Set UINavigationBar appearance whenContainedInInstancesOf to my viewcontroller not working

Question

I want to set white barTintColor in some viewcontroller I have set UINavigationBar.appearance().barTintColor for all default color but when I use appearance whenContainedInInstancesOf It's not change my viewcontroller

UINavigationBar.appearance(whenContainedInInstancesOf: [MyViewController.self]).barTintColor = .white

---

Any idea?. I tried this in my viewcontroller

self.navigationcontroller.navigationbar.barTintColor = .white

but I have to set color back to default when screen will disappear. I don't want to do like that. How can I do?

Burleson

Possible duplicate of appearanceWhenContainedIn in Swift – Baez

@Baez I tried this UINavigationBar.appearance(whenContainedInInstancesOf: [MyViewController.self]).barTintColor = .white but it still not work! – Burleson

But it says that it's only for iOS 10 so which version are you testing on – Baez

@Baez my device is 10.1.1. – Burleson

Answer 1

UINavigationBar is contained in a UINavigationController not UIViewController

with that said you need to create a custom UINavigationController

an empty class will do the job

class NavigationController: UINavigationController {}

then we can use it

UINavigationBar.appearance(whenContainedInInstancesOf: [NavigationController.self]).barTintColor = .white

Example can be found here

Baez

I think this will change others screen too. which screens are next to first screen (screen that's need white navigationbar). – Burleson

if you mean that this will change the color for UINavigationController too then no. it will take effect only for NavigationController – Baez

@Burleson by the way did you think or try? – Baez

Yeah, I tried. It's show as I think. It's change all screen that's in flow. Now I have to set it in each viewcontroller. I don't want to struck on it. Thanks for your solutions :) – Burleson

@Burleson that's strange anyway I added an example to take a look at. Please let me know if you still have a problem – Baez

This should be the correct answer, you saved my day. Thank you :) – Adrien

Answer 2

@zombie has the correct answer. I just came across this issue a moment ago with UISearchBar. Here's the Swift 3 version of the answer. Using .red as the sample UIColor for this example.

 let textField = UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self])
 textField.tintColor = .red

 let searchBar = UIBarButtonItem.appearance(whenContainedInInstancesOf: [UISearchBar.self])
 searchBar.setTitleTextAttributes([NSForegroundColorAttributeName: .red], for: .normal)
 searchBar.setTitleTextAttributes([NSForegroundColorAttributeName: .red], for: .disabled)

Britnibrito

Answer 3

Swift 4:

    // For the cursor color
    let textField = UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self])
    textField.tintColor = .lightBlue

    // For the cancel button on search bar
    UIBarButtonItem.appearance(whenContainedInInstancesOf: [UISearchBar.self]).setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.white], for: .normal)
    UIBarButtonItem.appearance(whenContainedInInstancesOf: [UISearchBar.self]).setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.lightText], for: .disabled)

Burrussburry

Answer 4

UIBarButtonItem.appearance(whenContainedInInstancesOf: [UIImagePickerController.self]).setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.black], for: .normal)

This worked for me!

Bonucci