completionhandler Questions
2
I have a iOS (swift) Application available AppStore since November 2017. I added Firebase Analytics and Crashlytics to proactively see issues which didn't occur during development and testing.
I'm...
Luba asked 18/10, 2018 at 17:12
9
Solved
I was just curious as to how I would approach this. If I had a function, and I wanted something to happen when it was fully executed, how would I add this into the function? Thanks
Mortensen asked 22/5, 2015 at 16:13
3
Solved
After years, I'm trying to develop an Android app, using Firebase Firestore. I'm basically trying to replicate this Swift function:
func getCategories(onCompletion completionBlock: @escaping (_ ca...
Froh asked 30/12, 2018 at 16:41
3
Solved
Looking at the documentation for URLSession.dataTask it's clear this function is called asynchronously but there's no mention of whether the completionHandler returns to the main thread, the thread...
Littell asked 23/2, 2018 at 16:9
3
Solved
I'm using DispatchGroup.enter() and leave() to process a helper class's reverseG async function. Problem is clear, I'm using mainViewController's object to call mainViewControllers's dispatchGroup....
Dearly asked 6/8, 2017 at 17:38
1
Solved
In my project, I came across a situation when I need to use the background queue to create an AVPlayerItem (which I create in setupTrackModels function). I'd like do it in getTracks function, and t...
Wilbur asked 22/10, 2020 at 12:6
8
Solved
In my UIActivityViewController, I use completion handler to execute a "successfully shared" notification. It works but my only problem is, it still shows the notification if the user presses cancel...
Arta asked 28/2, 2014 at 0:42
3
Solved
I have this same question as was asked and answered here: How to get data to return from NSURLSessionDataTask
The difference: How can I do this in Swift? I do not know Objective C at all so trying...
Kissable asked 7/11, 2014 at 5:29
1
Solved
I am attempting to open an app in one of two ways:
If the user has no UserDefaults saved, then open up a WelcomeViewController
If the user has UserDefaults saved, then open up a MenuContainerView...
Norrisnorrv asked 13/11, 2019 at 20:45
3
Solved
I am trying to call a swift method, which is implemented like this:-
@objc class DataAPI: NSObject {
func makeGet(place:NSString , completionHandler: (String! , Bool!) -> Void)
{
var str:Str...
Sacrilegious asked 17/8, 2016 at 9:54
4
I am messed with both completion handler and blocks while I am using them in Swift and Objective-C. And when I am searching blocks in Swift on google it is showing result for completion handler! Ca...
Nuncio asked 21/9, 2016 at 7:11
1
I am trying to handle "google sign in" in singleton helper class.
I have LoginHelper, and a method which handles logins with completion handler. As you know Google Sign have delegate methods. When...
Sclerite asked 28/4, 2018 at 18:54
0
I am still quite new to iOS development and I am trying to teach myself good coding practices and design patterns in Swift starting with MVVM. I need to pass the data from a completion handle in my...
Prevaricator asked 28/4, 2018 at 6:2
2
Solved
I'm trying to coordinate several completion handlers for each element in an array.
The code is essentially this:
var results = [String:Int]()
func requestData(for identifiers: [String])
{
iden...
Vicenta asked 20/11, 2017 at 2:14
4
Solved
I am trying to check if UserNotifications are enabled and if not I want to throw an alert. So I have a function checkAvailability which checks multiple things, including the UserNotification author...
Beaubeauchamp asked 15/2, 2017 at 16:52
2
Solved
I have following function to download JSON data in my SeachVC (UIViewController) which works perfect.
func downloadJSON(){
guard let url = URL(string: "myURL") else { return }
URLSession.share...
Tortuosity asked 31/10, 2017 at 21:48
1
Solved
I'm sorry if this question has been asked previously, I really couldn't find anything even similar! I'm also sorry if the question is dumb, I'm an iOS Developer and I'm a bit lost here in Android.....
Bakst asked 30/8, 2017 at 17:3
3
I have the following function where I have completion handler but I'm getting this error:
Closure use of non-escaping parameter may allow it to escape
Here is my code:
func makeRequestcompletio...
Tangerine asked 13/2, 2017 at 22:38
2
Solved
I have a series of nested completion blocks in the code provided below. This is because I need to make separate network requests in the background to abstract data to be used in the next method, wh...
Glacis asked 1/6, 2017 at 7:42
3
Solved
I am wondering how to do the following correctly: I have a method that is to return an NSData object. It gets the NSData object from a UIDocument. The NSData object can get large, so I want to make...
Icarus asked 8/3, 2014 at 10:4
2
Solved
I am trying to fetch data from two different Firebase tables. Here is the structure of table:
Post {
1{
pImages{
i1:true
i2:true
}
}
2{
pImages{
i3:true
}
}
}
Images{
i1{
iUrl : .......
Newscast asked 10/7, 2016 at 2:55
2
Solved
working on some FirAuth things, but for some reason I can't figure out how to check if the users proposed email address has already been taken. I've tried calling .fetchProvidersForEmail as suggest...
Scarberry asked 30/7, 2016 at 17:43
2
I have a function performSync which runs through an array and for each item in this array, I am calling a function which in itself contains an async alamofire request. I need to be able to tell whe...
Introduction asked 1/2, 2017 at 11:6
2
Solved
I've tried to troubleshoot this warning but have had no success. Since upgrading to swift3, I am receiving a warning message in my Facebook Graph Request completion handler.
The error message is ...
Rimskykorsakov asked 26/9, 2016 at 21:4
5
Solved
It seems that for some reason Swift have chosen to make coding in it less readable by forcing users to remove completion handler parameter labels. I have read the Swift discussion and still think i...
Janie asked 21/9, 2016 at 9:56
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