I wanna show, programmatically, an activity indicator with text, like the one in the Photos app (after editing and saving a picture). How can I do this?
How to display an activity indicator with text on iOS 8 with Swift?
Here is an open source version of this I made github.com/goktugyil/CozyLoadingActivity –
Erastianism
Xcode 9.0 • Swift 4.0
import UIKit
class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
@IBOutlet weak var imageView: UIImageView!
@IBOutlet weak var filterButton: UIButton!
@IBOutlet weak var saveButton: UIButton!
let destinationUrl = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
.appendingPathComponent("filteredImage.png")
let imagePicker = UIImagePickerController()
let messageFrame = UIView()
var activityIndicator = UIActivityIndicatorView()
var strLabel = UILabel()
let effectView = UIVisualEffectView(effect: UIBlurEffect(style: .dark))
func activityIndicator(_ title: String) {
strLabel.removeFromSuperview()
activityIndicator.removeFromSuperview()
effectView.removeFromSuperview()
strLabel = UILabel(frame: CGRect(x: 50, y: 0, width: 160, height: 46))
strLabel.text = title
strLabel.font = .systemFont(ofSize: 14, weight: .medium)
strLabel.textColor = UIColor(white: 0.9, alpha: 0.7)
effectView.frame = CGRect(x: view.frame.midX - strLabel.frame.width/2, y: view.frame.midY - strLabel.frame.height/2 , width: 160, height: 46)
effectView.layer.cornerRadius = 15
effectView.layer.masksToBounds = true
activityIndicator = UIActivityIndicatorView(activityIndicatorStyle: .white)
activityIndicator.frame = CGRect(x: 0, y: 0, width: 46, height: 46)
activityIndicator.startAnimating()
effectView.contentView.addSubview(activityIndicator)
effectView.contentView.addSubview(strLabel)
view.addSubview(effectView)
}
func saveImage() {
do {
try imageView.image?.data?.write(to: destinationUrl, options: .atomic)
print("file saved")
} catch {
print(error)
}
}
func applyFilterToImage() {
imageView.image = imageView.image?.applying(contrast: 1.5)
}
override func viewDidLoad() {
super.viewDidLoad()
guard let url = URL(string: "https://upload.wikimedia.org/wikipedia/commons/a/a8/VST_images_the_Lagoon_Nebula.jpg"), let data = try? Data(contentsOf: url), let image = UIImage(data: data) else { return }
view.backgroundColor = UIColor(white: 0, alpha: 1)
imageView.image = image
}
@IBAction func startSavingImage(_ sender: AnyObject) {
saveButton.isEnabled = false
filterButton.isEnabled = false
activityIndicator("Saving Image")
DispatchQueue.main.async {
self.saveImage()
DispatchQueue.main.async {
self.effectView.removeFromSuperview()
self.saveButton.isEnabled = true
self.filterButton.isEnabled = true
}
}
}
@IBAction func filterAction(_ sender: AnyObject) {
filterButton.isEnabled = false
saveButton.isEnabled = false
activityIndicator("Applying Filter")
DispatchQueue.main.async {
self.applyFilterToImage()
DispatchQueue.main.async {
self.effectView.removeFromSuperview()
self.filterButton.isEnabled = true
self.saveButton.isEnabled = true
}
}
}
@IBAction func cameraAction(_ sender: AnyObject) {
if UIImagePickerController.isSourceTypeAvailable(.camera) {
imagePicker.delegate = self
imagePicker.sourceType = .camera
present(imagePicker, animated: true)
}
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingImage image: UIImage!, editingInfo: [AnyHashable: Any]!) {
dismiss(animated: true, completion: nil)
imageView.image = image
}
}
extension Data {
var image: UIImage? { return UIImage(data: self) }
}
extension UIImage {
var data: Data? { return UIImagePNGRepresentation(self) }
func applying(contrast value: NSNumber) -> UIImage? {
guard let ciImage = CIImage(image: self)?.applyingFilter("CIColorControls", withInputParameters: [kCIInputContrastKey: value]) else { return nil }
UIGraphicsBeginImageContextWithOptions(size, false, scale)
defer { UIGraphicsEndImageContext() }
UIImage(ciImage: ciImage).draw(in: CGRect(origin: .zero, size: size))
return UIGraphicsGetImageFromCurrentImageContext()
}
}
I modified progressBarDisplayer to be a class and have it displayed by passing in the view as a parameter. How would you identify the progressBarDisplayer that has already been added and remove it when everything is finished loading? –
Kurus
@Kurus feel free to open a new question, post your actual code there and let me know if you would like me to take a look at it. –
Tague
Thanks for your response! I actually ended up storing the created view in a variable and referencing it to
removeFromSuperview and set to nil. Not sure if it's the best way but your code set above helped greatly! –
Kurus anything for Objective-C? –
Phifer
@KrishnaMeena what it is not working? What is the error you are getting in which line? –
Tague
Do not add subviews directly to the visual effect view itself, instead add them to the -contentView.' I am getting this error –
Backstairs
Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '<UIActivityIndicatorView: 0x7ff425630c50; frame = (0 0; 46 46); layer = <CALayer: 0x60000022d900>> has been added as a subview to <UIVisualEffectView: 0x7ff4254258e0; frame = (107.5 310.5; 160 46); clipsToBounds = YES; layer = <CALayer: 0x60000003b400>>. Do not add subviews directly to the visual effect view itself, instead add them to the -contentView.' –
Backstairs
Getting above error on this line : effectView.addSubview(activityIndicator) –
Backstairs
Got it need to replace these 2 lines : effectView.contentView.addSubview(activityIndicator) effectView.contentView.addSubview(strLabel) –
Backstairs
While Esq's answer works, I've added my own implementation which is more in line with good component architecture by separating the view into it's own class. It also uses dynamic blurring introduced in iOS 8.
Here is how mine looks with an image background:
The code for this is encapsulated in it's own UIView class which means you can reuse it whenever you desire.
Updated for Swift 3
Usage
func viewDidLoad() {
super.viewDidLoad()
// Create and add the view to the screen.
let progressHUD = ProgressHUD(text: "Saving Photo")
self.view.addSubview(progressHUD)
// All done!
self.view.backgroundColor = UIColor.black
}
UIView Code
import UIKit
class ProgressHUD: UIVisualEffectView {
var text: String? {
didSet {
label.text = text
}
}
let activityIndictor: UIActivityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.gray)
let label: UILabel = UILabel()
let blurEffect = UIBlurEffect(style: .light)
let vibrancyView: UIVisualEffectView
init(text: String) {
self.text = text
self.vibrancyView = UIVisualEffectView(effect: UIVibrancyEffect(blurEffect: blurEffect))
super.init(effect: blurEffect)
self.setup()
}
required init?(coder aDecoder: NSCoder) {
self.text = ""
self.vibrancyView = UIVisualEffectView(effect: UIVibrancyEffect(blurEffect: blurEffect))
super.init(coder: aDecoder)
self.setup()
}
func setup() {
contentView.addSubview(vibrancyView)
contentView.addSubview(activityIndictor)
contentView.addSubview(label)
activityIndictor.startAnimating()
}
override func didMoveToSuperview() {
super.didMoveToSuperview()
if let superview = self.superview {
let width = superview.frame.size.width / 2.3
let height: CGFloat = 50.0
self.frame = CGRect(x: superview.frame.size.width / 2 - width / 2,
y: superview.frame.height / 2 - height / 2,
width: width,
height: height)
vibrancyView.frame = self.bounds
let activityIndicatorSize: CGFloat = 40
activityIndictor.frame = CGRect(x: 5,
y: height / 2 - activityIndicatorSize / 2,
width: activityIndicatorSize,
height: activityIndicatorSize)
layer.cornerRadius = 8.0
layer.masksToBounds = true
label.text = text
label.textAlignment = NSTextAlignment.center
label.frame = CGRect(x: activityIndicatorSize + 5,
y: 0,
width: width - activityIndicatorSize - 15,
height: height)
label.textColor = UIColor.gray
label.font = UIFont.boldSystemFont(ofSize: 16)
}
}
func show() {
self.isHidden = false
}
func hide() {
self.isHidden = true
}
}
Swift 2
An example on how to use it is like this:
override func viewDidLoad() {
super.viewDidLoad()
// Create and add the view to the screen.
let progressHUD = ProgressHUD(text: "Saving Photo")
self.view.addSubview(progressHUD)
// All done!
self.view.backgroundColor = UIColor.blackColor()
}
Here is the UIView code:
import UIKit
class ProgressHUD: UIVisualEffectView {
var text: String? {
didSet {
label.text = text
}
}
let activityIndictor: UIActivityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.White)
let label: UILabel = UILabel()
let blurEffect = UIBlurEffect(style: .Light)
let vibrancyView: UIVisualEffectView
init(text: String) {
self.text = text
self.vibrancyView = UIVisualEffectView(effect: UIVibrancyEffect(forBlurEffect: blurEffect))
super.init(effect: blurEffect)
self.setup()
}
required init(coder aDecoder: NSCoder) {
self.text = ""
self.vibrancyView = UIVisualEffectView(effect: UIVibrancyEffect(forBlurEffect: blurEffect))
super.init(coder: aDecoder)
self.setup()
}
func setup() {
contentView.addSubview(vibrancyView)
vibrancyView.contentView.addSubview(activityIndictor)
vibrancyView.contentView.addSubview(label)
activityIndictor.startAnimating()
}
override func didMoveToSuperview() {
super.didMoveToSuperview()
if let superview = self.superview {
let width = superview.frame.size.width / 2.3
let height: CGFloat = 50.0
self.frame = CGRectMake(superview.frame.size.width / 2 - width / 2,
superview.frame.height / 2 - height / 2,
width,
height)
vibrancyView.frame = self.bounds
let activityIndicatorSize: CGFloat = 40
activityIndictor.frame = CGRectMake(5, height / 2 - activityIndicatorSize / 2,
activityIndicatorSize,
activityIndicatorSize)
layer.cornerRadius = 8.0
layer.masksToBounds = true
label.text = text
label.textAlignment = NSTextAlignment.Center
label.frame = CGRectMake(activityIndicatorSize + 5, 0, width - activityIndicatorSize - 15, height)
label.textColor = UIColor.grayColor()
label.font = UIFont.boldSystemFontOfSize(16)
}
}
func show() {
self.hidden = false
}
func hide() {
self.hidden = true
}
}
Hi, Thanks for code but keep running into errors, declaring un viewDidLoad as suggested and get following error: 0x2dd698 of class '_TtC22LabMaternalhaematology11ProgressHUD' does not implement doesNotRecognizeSelector: -- abort (lldb) . Need to be able to show and hide within closures so need to make ref to object a instance ref –
Latonialatoniah
@Latonialatoniah did you ever figure this out? I am getting the same error now for some reason didn't change anything the error just started happening –
Canice
@tyler hey no I had planned to go back to it and have a look when I had finished project but not quite there yet, hopefully in next couple weeks, did u try any other solutions? –
Latonialatoniah
Hi guys, I shall have a look at this today and see what is going on. Sorry for not checking in sooner, been a busy month! –
Rigger
Maybe the class has to inherit from NSObject, not in front of it now so can't check –
Latonialatoniah
I'm not seeing any errors. Any way you can show me your code that is causing the crash? –
Rigger
Sure, will send code later . Essential I created a new class as above, but when I instantiated It as a instance variable I got the the error stated above. –
Latonialatoniah
Which initialiser did you use? init(text) or init(coder) ? –
Rigger
I actually figured out the issue UIBlureffect and UIVisualEffectView are not supported in iOS 8.. I updated the code to use uiview instead.. if you want it I can send it over not sure where to post it though –
Canice
Tried running there again in Xcode 6.1- When instantiang in viewDidLoad of a Viewcontroller I get a Error - ProgressHUD is not convertible to UIView......... let progressView = ProgressHUD(text: "hfoihw"); self.view.addSubview(ProgressHUD); –
Latonialatoniah
any reason why this doesn't center correctly in certain views on iPhone 6? iPhone 5 it works perfectly.. I just need it centered in the middle of the entire screen –
Canice
works great, no errors. I made some changes since on background with lots of white's, doesn't look good. I changed let blurEffect = UIBlurEffect(style: UIBlurEffectStyle.Dark) let width = superview.frame.size.width / 1.7 //to make more space label.font = UIFont.boldSystemFontOfSize(15) //more text... –
Hoagland
@Elliott Minns How to make this into center? –
Marilou
This is definitely the best approach (a reusable class), but the label text and spinner are way too light to see properly. And
label.color = <color> is ignored :-S –
Angadresma @Angadresma Try using
label.textColor = <color> –
Rigger @Marilou This should center the view already. The code is in the
didMoveToSuperview() function –
Rigger @ElliottMinns that's what I meant (i.g. pseudo code). If i do
label.textColor = UIColor.greenColor() it has no effect on the text color. –
Angadresma Nice; needed some tweakage to cope with orientation changes - but a great starting place –
Garret
Why don't you just create a cocoapod with this one? –
Dimond
@Dimond I probably should at this point. I'll whip something up tomorrow and post it on here. –
Rigger
To avoid text and spinner being too light (@Angadresma stated that) add the label and indicator views to the root's contentView instead of the vibrancy's. –
Radiative
@ElliottMinns This doesn't appear in center of the screen (Tested it in iPhone 7 Plus simulator) –
Brufsky
@Brufsky calling
self.view.addSubview(progressHUD) from viewWillAppear() instead of viewDidLoad solves the centering issue – Kirill Kudaev 15 mins ago –
Paramagnetic Heres how this code looks:
Heres my drag and drop code:
var boxView = UIView()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
view.backgroundColor = UIColor.blackColor()
addSavingPhotoView()
//Custom button to test this app
var button = UIButton(frame: CGRect(x: 20, y: 20, width: 20, height: 20))
button.backgroundColor = UIColor.redColor()
button.addTarget(self, action: "buttonAction:", forControlEvents: UIControlEvents.TouchUpInside)
view.addSubview(button)
}
func addSavingPhotoView() {
// You only need to adjust this frame to move it anywhere you want
boxView = UIView(frame: CGRect(x: view.frame.midX - 90, y: view.frame.midY - 25, width: 180, height: 50))
boxView.backgroundColor = UIColor.whiteColor()
boxView.alpha = 0.8
boxView.layer.cornerRadius = 10
//Here the spinnier is initialized
var activityView = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.Gray)
activityView.frame = CGRect(x: 0, y: 0, width: 50, height: 50)
activityView.startAnimating()
var textLabel = UILabel(frame: CGRect(x: 60, y: 0, width: 200, height: 50))
textLabel.textColor = UIColor.grayColor()
textLabel.text = "Saving Photo"
boxView.addSubview(activityView)
boxView.addSubview(textLabel)
view.addSubview(boxView)
}
func buttonAction(sender:UIButton!) {
//When button is pressed it removes the boxView from screen
boxView.removeFromSuperview()
}
Here is an open source version of this: https://github.com/goktugyil/CozyLoadingActivity
Here is an open source version of this I made github.com/goktugyil/CozyLoadingActivity –
Erastianism
Based o my previous answer, here is a more elegant solution with a custom class:
First define this custom class:
import UIKit
import Foundation
class ActivityIndicatorView
{
var view: UIView!
var activityIndicator: UIActivityIndicatorView!
var title: String!
init(title: String, center: CGPoint, width: CGFloat = 200.0, height: CGFloat = 50.0)
{
self.title = title
let x = center.x - width/2.0
let y = center.y - height/2.0
self.view = UIView(frame: CGRect(x: x, y: y, width: width, height: height))
self.view.backgroundColor = UIColor(red: 255.0/255.0, green: 204.0/255.0, blue: 51.0/255.0, alpha: 0.5)
self.view.layer.cornerRadius = 10
self.activityIndicator = UIActivityIndicatorView(frame: CGRect(x: 0, y: 0, width: 50, height: 50))
self.activityIndicator.color = UIColor.blackColor()
self.activityIndicator.hidesWhenStopped = false
let titleLabel = UILabel(frame: CGRect(x: 60, y: 0, width: 200, height: 50))
titleLabel.text = title
titleLabel.textColor = UIColor.blackColor()
self.view.addSubview(self.activityIndicator)
self.view.addSubview(titleLabel)
}
func getViewActivityIndicator() -> UIView
{
return self.view
}
func startAnimating()
{
self.activityIndicator.startAnimating()
UIApplication.sharedApplication().beginIgnoringInteractionEvents()
}
func stopAnimating()
{
self.activityIndicator.stopAnimating()
UIApplication.sharedApplication().endIgnoringInteractionEvents()
self.view.removeFromSuperview()
}
//end
}
Now on your UIViewController class:
var activityIndicatorView: ActivityIndicatorView!
override func viewDidLoad()
{
super.viewDidLoad()
self.activityIndicatorView = ActivityIndicatorView(title: "Processing...", center: self.view.center)
self.view.addSubview(self.activityIndicatorView.getViewActivityIndicator())
}
func doSomething()
{
self.activityIndicatorView.startAnimating()
UIApplication.sharedApplication().beginIgnoringInteractionEvents()
//do something here that will taking time
self.activityIndicatorView.stopAnimating()
}
Quick question. Why do you call UIApplication.sharedApplication().beginIgnoringInteractionEvents() twice in doSomething() -> self.activityIndicatorView.startAnimating() then right after that call ? –
Westland
For activity indicator, its better you create one custom class.
Instead of creating UIActivityIndicator in each UIViewController.Subclass UIView and use from any UIViewController.
Updated for Swift 5.0:
import UIKit
import Foundation
class ProgressIndicator: UIView {
var indicatorColor:UIColor
var loadingViewColor:UIColor
var loadingMessage:String
var messageFrame = UIView()
var activityIndicator = UIActivityIndicatorView()
init(inview:UIView,loadingViewColor:UIColor,indicatorColor:UIColor,msg:String){
self.indicatorColor = indicatorColor
self.loadingViewColor = loadingViewColor
self.loadingMessage = msg
super.init(frame: CGRect(x: inview.frame.midX - 90, y: inview.frame.midY - 250 , width: 180, height: 50))
initalizeCustomIndicator()
}
convenience init(inview:UIView) {
self.init(inview: inview,loadingViewColor: UIColor.brown,indicatorColor:UIColor.black, msg: "Loading..")
}
convenience init(inview:UIView,messsage:String) {
self.init(inview: inview,loadingViewColor: UIColor.brown,indicatorColor:UIColor.black, msg: messsage)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func initalizeCustomIndicator(){
messageFrame.frame = self.bounds
activityIndicator = UIActivityIndicatorView(style: UIActivityIndicatorView.Style.medium)
activityIndicator.tintColor = indicatorColor
activityIndicator.hidesWhenStopped = true
activityIndicator.frame = CGRect(x: self.bounds.origin.x + 6, y: 0, width: 20, height: 50)
print(activityIndicator.frame)
let strLabel = UILabel(frame:CGRect(x: self.bounds.origin.x + 30, y: 0, width: self.bounds.width - (self.bounds.origin.x + 30) , height: 50))
strLabel.text = loadingMessage
strLabel.adjustsFontSizeToFitWidth = true
strLabel.textColor = UIColor.white
messageFrame.layer.cornerRadius = 15
messageFrame.backgroundColor = loadingViewColor
messageFrame.alpha = 0.8
messageFrame.addSubview(activityIndicator)
messageFrame.addSubview(strLabel)
}
func start(){
//check if view is already there or not..if again started
if !self.subviews.contains(messageFrame){
activityIndicator.startAnimating()
self.addSubview(messageFrame)
}
}
func stop(){
if self.subviews.contains(messageFrame){
activityIndicator.stopAnimating()
messageFrame.removeFromSuperview()
}
}
}
Put this class in your project and then call from any ViewController as
var indicator:ProgressIndicator?
override func viewDidLoad() {
super.viewDidLoad()
//indicator = ProgressIndicator(inview: self.view,messsage: "Hello from Nepal..")
//self.view.addSubview(indicator!)
//OR
indicator = ProgressIndicator(inview:self.view,loadingViewColor: UIColor.grayColor(), indicatorColor: UIColor.blackColor(), msg: "Landing within minutes,Please hold tight..")
self.view.addSubview(indicator!)
}
@IBAction func startBtn(sender: AnyObject) {
indicator!.start()
}
@IBAction func stopBtn(sender: AnyObject) {
indicator!.stop()
}
For Swift 3
Usage
class LoginTVC: UITableViewController {
var loadingView : LoadingView!
override func viewDidLoad() {
super.viewDidLoad()
// CASE 1: To Show loadingView on load
loadingView = LoadingView(uiView: view, message: "Sending you verification code")
}
// CASE 2: To show loadingView on click of a button
@IBAction func showLoadingView(_ sender: UIButton) {
if let loaderView = loadingView{ // If loadingView already exists
if loaderView.isHidden() {
loaderView.show() // To show activity indicator
}
}
else{
loadingView = LoadingView(uiView: view, message: "Sending you verification code")
}
}
}
// CASE 3: To hide LoadingView on click of a button
@IBAction func hideLoadingView(_ sender: UIButton) {
if let loaderView = loadingView{ // If loadingView already exists
self.loadingView.hide()
}
}
}
LoadingView Class
class LoadingView {
let uiView : UIView
let message : String
let messageLabel = UILabel()
let loadingSV = UIStackView()
let loadingView = UIView()
let activityIndicator: UIActivityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.gray)
init(uiView: UIView, message: String) {
self.uiView = uiView
self.message = message
self.setup()
}
func setup(){
let viewWidth = uiView.bounds.width
let viewHeight = uiView.bounds.height
// Configuring the message label
messageLabel.text = message
messageLabel.textColor = UIColor.darkGray
messageLabel.textAlignment = .center
messageLabel.numberOfLines = 3
messageLabel.lineBreakMode = .byWordWrapping
// Creating stackView to center and align Label and Activity Indicator
loadingSV.axis = .vertical
loadingSV.distribution = .equalSpacing
loadingSV.alignment = .center
loadingSV.addArrangedSubview(activityIndicator)
loadingSV.addArrangedSubview(messageLabel)
// Creating loadingView, this acts as a background for label and activityIndicator
loadingView.frame = uiView.frame
loadingView.center = uiView.center
loadingView.backgroundColor = UIColor.darkGray.withAlphaComponent(0.3)
loadingView.clipsToBounds = true
// Disabling auto constraints
loadingSV.translatesAutoresizingMaskIntoConstraints = false
// Adding subviews
loadingView.addSubview(loadingSV)
uiView.addSubview(loadingView)
activityIndicator.startAnimating()
// Views dictionary
let views = [
"loadingSV": loadingSV
]
// Constraints for loadingSV
uiView.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-[loadingSV(300)]-|", options: [], metrics: nil, views: views))
uiView.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|-\(viewHeight / 3)-[loadingSV(50)]-|", options: [], metrics: nil, views: views))
}
// Call this method to hide loadingView
func show() {
loadingView.isHidden = false
}
// Call this method to show loadingView
func hide(){
loadingView.isHidden = true
}
// Call this method to check if loading view already exists
func isHidden() -> Bool{
if loadingView.isHidden == false{
return false
}
else{
return true
}
}
}
You can create your own. For example:
Create a view with white background and rounded corners:
var view = UIView(frame: CGRect(x: 0, y: 0, width: 300, height: 50))
view.backgroundColor = UIColor.whiteColor()
view.layer.cornerRadius = 10
Add two subviews, a UIActivityIndicatorView and a UILabel:
var wait = UIActivityIndicatorView(frame: CGRect(x: 0, y: 0, width: 50, height: 50))
wait.color = UIColor.blackColor()
wait.hidesWhenStopped = false
var text = UILabel(frame: CGRect(x: 60, y: 0, width: 200, height: 50))
text.text = "Processing..."
view.addSubview(wait)
view.addSubview(text)
your code is easy to understand but I does not work. I have a button in my app to save an image. I just pasted this code to its
IBAction in my view controller and nothing happened –
Station You need to add
view as a subview of the view where you are trying to show the spinner. Also, it looks like Apple’s version may be using a UIVisualEffectView to blur the background behind it. –
Brittle Please see Zev's comment. My code creates the view, but you need to place it somewhere. You will probably want to do something nicer with the dimensions. –
Tina
Ok, it works here, but i change this
wait.hidesWhenStopped = false. Question: how to hide the object view ? –
Cotoneaster Answer: view.removeFromSuperview() –
Cotoneaster
Based on "MirekE" answer here is a code that i tested now and its working:
var activityIndicator: UIActivityIndicatorView!
var viewActivityIndicator: UIView!
override func viewDidLoad()
{
super.viewDidLoad()
let width: CGFloat = 200.0
let height: CGFloat = 50.0
let x = self.view.frame.width/2.0 - width/2.0
let y = self.view.frame.height/2.0 - height/2.0
self.viewActivityIndicator = UIView(frame: CGRect(x: x, y: y, width: width, height: height))
self.viewActivityIndicator.backgroundColor = UIColor(red: 255.0/255.0, green: 204.0/255.0, blue: 51.0/255.0, alpha: 0.5)
self.viewActivityIndicator.layer.cornerRadius = 10
self.activityIndicator = UIActivityIndicatorView(frame: CGRect(x: 0, y: 0, width: 50, height: 50))
self.activityIndicator.color = UIColor.blackColor()
self.activityIndicator.hidesWhenStopped = false
let titleLabel = UILabel(frame: CGRect(x: 60, y: 0, width: 200, height: 50))
titleLabel.text = "Processing..."
self.viewActivityIndicator.addSubview(self.activityIndicator)
self.viewActivityIndicator.addSubview(titleLabel)
self.view.addSubview(self.viewActivityIndicator)
}
func doSometing()
{
self.activityIndicator.startAnimating()
UIApplication.sharedApplication().beginIgnoringInteractionEvents()
//do something here that will taking time
self.activityIndicator.stopAnimating()
UIApplication.sharedApplication().endIgnoringInteractionEvents()
self.viewActivityIndicator.removeFromSuperview()
}
With auto width and theme support also detects rotate while busy (Swift 3 version)
Use it like below:
var progressView: ProgressView?
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
self.progressView = ProgressView(message: "Work in progress!",
theme: .dark,
isModal: true)
}
@IBAction func onPause(_ sender: AnyObject) {
self.progressView.show()
}
@IBAction func onResume(_ sender: AnyObject) {
self.progressView.hide()
}
ProgressView.swift
import UIKit
class ProgressView: UIView {
enum Theme {
case light
case dark
}
var theme: Theme
var container: UIStackView
var activityIndicator: UIActivityIndicatorView
var label: UILabel
var glass: UIView
private var message: String
private var isModal: Bool
init(message: String, theme: theme, isModal: Bool) {
// Init
self.message = message
self.theme = theme
self.isModal = isModal
self.container = UIStackView()
self.activityIndicator = UIActivityIndicatorView()
self.label = UILabel()
self.glass = UIView()
// Get proper width by text message
let fontName = self.label.font.fontName
let fontSize = self.label.font.pointSize
if let font = UIFont(name: fontName, size: fontSize) {
let fontAttributes = [NSFontAttributeName: font]
let size = (message as NSString).size(attributes: fontAttributes)
super.init(frame: CGRect(x: 0, y: 0, width: size.width + 50, height: 50))
} else {
super.init(frame: CGRect(x: 0, y: 0, width: 200, height: 50))
}
// Detect rotation
NotificationCenter.default.addObserver(self, selector: #selector(onRotate), name: NSNotification.Name.UIDeviceOrientationDidChange, object: nil)
// Style
self.layer.cornerRadius = 3
if (self.theme == .dark) {
self.backgroundColor = .darkGray
} else {
self.backgroundColor = .lightGray
}
// Label
if self.theme == .dark {
self.label.textColor = .white
}else{
self.label.textColor = .black
}
self.label.text = self.message
// Container
self.container.frame = self.frame
self.container.spacing = 5
self.container.layoutMargins = UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5)
self.container.isLayoutMarginsRelativeArrangement = true
// Activity indicator
if (self.theme == .dark) {
self.activityIndicator = UIActivityIndicatorView(activityIndicatorStyle: .whiteLarge)
self.activityIndicator.color = .white
} else {
self.activityIndicator = UIActivityIndicatorView(activityIndicatorStyle:.whiteLarge)
self.activityIndicator.color = .black
}
self.activityIndicator.startAnimating()
// Add them to container
// First glass
if let superview = UIApplication.shared.keyWindow {
if (self.isModal) {
// glass
self.glass.frame = superview.frame;
if (self.theme == .dark) {
self.glass.backgroundColor = UIColor.black.withAlphaComponent(0.5)
} else {
self.glass.backgroundColor = UIColor.white.withAlphaComponent(0.5)
}
superview.addSubview(glass)
}
}
// Then activity indicator and label
container.addArrangedSubview(self.activityIndicator)
container.addArrangedSubview(self.label)
// Last attach it to container (StackView)
self.addSubview(container)
if let superview = UIApplication.shared.keyWindow {
self.center = superview.center
superview.addSubview(self)
}
//Do not show until show() is called
self.hide()
}
required init(coder: NSCoder) {
self.theme = .dark
self.Message = "Not set!"
self.isModal = true
self.container = UIStackView()
self.activityIndicator = UIActivityIndicatorView()
self.label = UILabel()
self.glass = UIView()
super.init(coder: coder)!
}
func onRotate() {
if let superview = self.superview {
self.glass.frame = superview.frame
self.center = superview.center
// superview.addSubview(self)
}
}
public func show() {
self.glass.isHidden = false
self.isHidden = false
}
public func hide() {
self.glass.isHidden = true
self.isHidden = true
}
}
simple activity controller class !!!
class ActivityIndicator: UIVisualEffectView {
let activityIndictor: UIActivityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.WhiteLarge)
let label: UILabel = UILabel()
let blurEffect = UIBlurEffect(style: .Dark)
let vibrancyView: UIVisualEffectView
init() {
self.vibrancyView = UIVisualEffectView(effect: UIVibrancyEffect(forBlurEffect: blurEffect))
super.init(effect: blurEffect)
self.setup()
}
required init?(coder aDecoder: NSCoder) {
self.vibrancyView = UIVisualEffectView(effect: UIVibrancyEffect(forBlurEffect: blurEffect))
super.init(coder: aDecoder)
self.setup()
}
func setup() {
contentView.addSubview(vibrancyView)
vibrancyView.contentView.addSubview(activityIndictor)
activityIndictor.startAnimating()
}
override func didMoveToSuperview() {
super.didMoveToSuperview()
if let superview = self.superview {
let width: CGFloat = 75.0
let height: CGFloat = 75.0
self.frame = CGRectMake(superview.frame.size.width / 2 - width / 2,
superview.frame.height / 2 - height / 2,
width,
height)
vibrancyView.frame = self.bounds
let activityIndicatorSize: CGFloat = 40
activityIndictor.frame = CGRectMake(18, height / 2 - activityIndicatorSize / 2,
activityIndicatorSize,
activityIndicatorSize)
layer.cornerRadius = 8.0
layer.masksToBounds = true
}
}
func show() {
self.hidden = false
}
func hide() {
self.hidden = true
}}
usage :-
let activityIndicator = ActivityIndicator()
self.view.addSubview(activityIndicator)
to hide :-
activityIndicator.hide()
Xcode 10.1 • Swift 4.2
import UIKit
class ProgressHUD: UIVisualEffectView {
var title: String?
var theme: UIBlurEffect.Style = .light
let strLabel = UILabel(frame: CGRect(x: 50, y: 0, width: 160, height: 46))
let activityIndicator = UIActivityIndicatorView()
init(title: String, theme: UIBlurEffect.Style = .light) {
super.init(effect: UIBlurEffect(style: theme))
self.title = title
self.theme = theme
[activityIndicator, strLabel].forEach(contentView.addSubview(_:))
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func didMoveToSuperview() {
super.didMoveToSuperview()
if let superview = self.superview {
frame = CGRect(x: superview.frame.midX - strLabel.frame.width / 2,
y: superview.frame.midY - strLabel.frame.height / 2, width: 160, height: 46)
layer.cornerRadius = 15.0
layer.masksToBounds = true
activityIndicator.frame = CGRect(x: 0, y: 0, width: 46, height: 46)
activityIndicator.startAnimating()
strLabel.text = title
strLabel.font = .systemFont(ofSize: 14, weight: UIFont.Weight.medium)
switch theme {
case .dark:
strLabel.textColor = .white
activityIndicator.style = .white
default:
strLabel.textColor = .gray
activityIndicator.style = .gray
}
}
}
func show() {
self.isHidden = false
}
func hide() {
self.isHidden = true
}
}
Use:
let progress = ProgressHUD(title: "Authorization", theme: .dark)
[progress].forEach(view.addSubview(_:))
This code work in SWIFT 2.0.
Must Declare a variable for initialize UIActivityIndicatorView
let actInd: UIActivityIndicatorView = UIActivityIndicatorView()
After initialize put this code in your controller.
actInd.center = ImageView.center
actInd.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.WhiteLarge
view.addSubview(actInd)
actInd.startAnimating()
after your download process complete then hide a animation.
self.actInd.stopAnimating()
In Swift 3
Declare variables which we will use
var activityIndicator = UIActivityIndicatorView()
let loadingView = UIView()
let loadingLabel = UILabel()
Set label , view and activityIndicator
func setLoadingScreen(myMsg : String) {
let width: CGFloat = 120
let height: CGFloat = 30
let x = (self.view.frame.width / 2) - (width / 2)
let y = (169 / 2) - (height / 2) + 60
loadingView.frame = CGRect(x: x, y: y, width: width, height: height)
self.loadingLabel.textColor = UIColor.white
self.loadingLabel.textAlignment = NSTextAlignment.center
self.loadingLabel.text = myMsg
self.loadingLabel.frame = CGRect(x: 0, y: 0, width: 160, height: 30)
self.loadingLabel.isHidden = false
self.activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.white
self.activityIndicator.frame = CGRect(x: 0, y: 0, width: 30, height: 30)
self.activityIndicator.startAnimating()
loadingView.addSubview(self.spinner)
loadingView.addSubview(self.loadingLabel)
self.view.addSubview(loadingView)
}
Start Animation
@IBAction func start_animation(_ sender: Any) {
setLoadingScreen(myMsg: "Loading...")
}
Stop Animation
@IBAction func stop_animation(_ sender: Any) {
self.spinner.stopAnimating()
UIApplication.shared.endIgnoringInteractionEvents()
self.loadingLabel.isHidden = true
}
import UIKit
class ViewControllerUtils {
let containerView: UIView = {
let view = UIView()
view.translatesAutoresizingMaskIntoConstraints = false
view.backgroundColor = UIColor(white: 0, alpha: 0.3)
return view
}()
let loadingView: UIView = {
let view = UIView()
view.translatesAutoresizingMaskIntoConstraints = false
view.backgroundColor = UIColor(white: 0, alpha: 0.7)
view.clipsToBounds = true
view.layer.cornerRadius = 10
return view
}()
let activityIndicatorView: UIActivityIndicatorView = {
let aiv = UIActivityIndicatorView()
aiv.translatesAutoresizingMaskIntoConstraints = false
aiv.style = UIActivityIndicatorView.Style.whiteLarge
return aiv
}()
let loadingLabel: UILabel = {
let label = UILabel()
label.translatesAutoresizingMaskIntoConstraints = false
label.text = "Loading..."
label.textAlignment = .center
label.textColor = .white
label.font = .systemFont(ofSize: 15, weight: UIFont.Weight.medium)
return label
}()
func showLoader() {
guard let window = UIApplication.shared.keyWindow else { return }
window.addSubview(containerView)
containerView.addSubview(loadingView)
loadingView.addSubview(activityIndicatorView)
loadingView.addSubview(loadingLabel)
containerView.leftAnchor.constraint(equalTo: window.leftAnchor).isActive = true
containerView.rightAnchor.constraint(equalTo: window.rightAnchor).isActive = true
containerView.topAnchor.constraint(equalTo: window.topAnchor).isActive = true
containerView.bottomAnchor.constraint(equalTo: window.bottomAnchor).isActive = true
loadingView.centerXAnchor.constraint(equalTo: window.centerXAnchor).isActive = true
loadingView.centerYAnchor.constraint(equalTo: window.centerYAnchor).isActive = true
loadingView.widthAnchor.constraint(equalToConstant: 120).isActive = true
loadingView.heightAnchor.constraint(equalToConstant: 120).isActive = true
activityIndicatorView.centerXAnchor.constraint(equalTo: window.centerXAnchor).isActive = true
activityIndicatorView.centerYAnchor.constraint(equalTo: window.centerYAnchor).isActive = true
activityIndicatorView.widthAnchor.constraint(equalToConstant: 60).isActive = true
activityIndicatorView.heightAnchor.constraint(equalToConstant: 60).isActive = true
loadingLabel.leftAnchor.constraint(equalTo: loadingView.leftAnchor).isActive = true
loadingLabel.rightAnchor.constraint(equalTo: loadingView.rightAnchor).isActive = true
loadingLabel.bottomAnchor.constraint(equalTo: loadingView.bottomAnchor).isActive = true
loadingLabel.heightAnchor.constraint(equalToConstant: 40).isActive = true
DispatchQueue.main.async {
self.activityIndicatorView.startAnimating()
}
}
func hideLoader() {
DispatchQueue.main.async {
self.activityIndicatorView.stopAnimating()
self.activityIndicatorView.removeFromSuperview()
self.loadingLabel.removeFromSuperview()
self.loadingView.removeFromSuperview()
self.containerView.removeFromSuperview()
}
}
}
//// In order to show the activity indicator, call the function from your view controller
// let viewControllerUtils = ViewControllerUtils()
// viewControllerUtils.showLoader()
//// In order to hide the activity indicator, call the function from your view controller
// viewControllerUtils.hideLoader()
class ViewControllerUtils2 {
var container: UIView = UIView()
var loadingView: UIView = UIView()
var activityIndicator: UIActivityIndicatorView = UIActivityIndicatorView()
let loadingLabel = UILabel()
func showLoader(_ uiView: UIView) {
container.frame = uiView.frame
container.center = uiView.center
container.backgroundColor = UIColor(white: 0, alpha: 0.3)
loadingView.frame = CGRect(x: 0, y: 0, width: 120, height: 120)
loadingView.center = uiView.center
loadingView.backgroundColor = UIColor(white: 0, alpha: 0.7)
loadingView.clipsToBounds = true
loadingView.layer.cornerRadius = 10
activityIndicator.frame = CGRect(x: 0, y: 0, width: 60, height: 60)
activityIndicator.style = UIActivityIndicatorView.Style.whiteLarge
activityIndicator.center = CGPoint(x: loadingView.frame.size.width / 2, y: loadingView.frame.size.height / 2)
loadingLabel.frame = CGRect(x: 0, y: 80, width: 120, height: 40)
loadingLabel.text = "Loading..."
loadingLabel.textAlignment = .center
loadingLabel.textColor = .white
loadingLabel.font = .systemFont(ofSize: 15, weight: UIFont.Weight.medium)
uiView.addSubview(container)
container.addSubview(loadingView)
loadingView.addSubview(activityIndicator)
loadingView.addSubview(loadingLabel)
DispatchQueue.main.async {
self.activityIndicator.startAnimating()
}
}
func hideLoader() {
DispatchQueue.main.async {
self.activityIndicator.stopAnimating()
self.activityIndicator.removeFromSuperview()
self.loadingLabel.removeFromSuperview()
self.loadingView.removeFromSuperview()
self.container.removeFromSuperview()
}
}
}
ViewControllerUtils use for all the view controller, where as with webView kindly use ViewControllerUtils2.. –
Formation
For Swift 5
Indicator with label inside WKWebview
var strLabel = UILabel()
let effectView = UIVisualEffectView(effect: UIBlurEffect(style: .dark))
let loadingTextLabel = UILabel()
@IBOutlet var indicator: UIActivityIndicatorView!
@IBOutlet var webView: WKWebView!
var refController:UIRefreshControl = UIRefreshControl()
override func viewDidLoad() {
webView = WKWebView(frame: CGRect.zero)
webView.navigationDelegate = self
webView.uiDelegate = self as? WKUIDelegate
let preferences = WKPreferences()
preferences.javaScriptEnabled = true
let configuration = WKWebViewConfiguration()
configuration.preferences = preferences
webView.allowsBackForwardNavigationGestures = true
webView.load(URLRequest(url: URL(string: "https://www.google.com")!))
setBackground()
}
func setBackground() {
view.addSubview(webView)
webView.translatesAutoresizingMaskIntoConstraints = false
webView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
webView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
webView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
webView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
}
func showActivityIndicator(show: Bool) {
if show {
strLabel = UILabel(frame: CGRect(x: 55, y: 0, width: 400, height: 66))
strLabel.text = "Please Wait. Checking Internet Connection..."
strLabel.font = UIFont(name: "Avenir Light", size: 12)
strLabel.textColor = UIColor(white: 0.9, alpha: 0.7)
effectView.frame = CGRect(x: view.frame.midX - strLabel.frame.width/2, y: view.frame.midY - strLabel.frame.height/2 , width: 300, height: 66)
effectView.layer.cornerRadius = 15
effectView.layer.masksToBounds = true
indicator = UIActivityIndicatorView(style: .white)
indicator.frame = CGRect(x: 0, y: 0, width: 66, height: 66)
indicator.startAnimating()
effectView.contentView.addSubview(indicator)
effectView.contentView.addSubview(strLabel)
indicator.transform = CGAffineTransform(scaleX: 1.4, y: 1.4);
effectView.center = webView.center
view.addSubview(effectView)
} else {
strLabel.removeFromSuperview()
effectView.removeFromSuperview()
indicator.removeFromSuperview()
indicator.stopAnimating()
}
}
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