How to change UIAlertController button text colour in iOS9?

Question

The question is similar to iOS 8 UIActivityViewController and UIAlertController button text color uses window's tintColor but in iOS 9.

I have a UIAlertController and the dismiss button keeps white colour even I have tried to set

[[UIView appearanceWhenContainedIn:[UIAlertController class], nil] setTintColor:[UIColor blackColor]];

UIAlertController *strongController = [UIAlertController alertControllerWithTitle:title
                                                             message:message
                                                      preferredStyle:preferredStyle];
strongController.view.tintColor = [UIColor black];

Solution 1

I've run into something similar in the past and the issue seems to stem from the fact that the alert controller's view isn't ready to accept tintColor changes before it's presented. Alternatively, try setting the tint color AFTER you present your alert controller:

[self presentViewController:strongController animated:YES completion:nil];
strongController.view.tintColor = [UIColor black];

Solution 2

In Swift 3.x:

I found the following to work effectively. I call this at app launch .

UIView.appearance(whenContainedInInstancesOf: [UIAlertController.self]).tintColor = UIColor.black

So this would change the tint color of all UIAlertViewController button labels in your app globally. The only button label color it doesn't change are those which have a UIAlertActionStyle of destructive.

Solution 3

Objective-C

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Title text"  message:@"Message text"  preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction* ok = [UIAlertAction actionWithTitle:@"Yes" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) {
//code here…
}];
UIAlertAction* cancel = [UIAlertAction actionWithTitle:@"Later" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) {
//code here….
}];
[ok setValue:[UIColor greenColor] forKey:@"titleTextColor"];
[cancel setValue:[UIColor redColor] forKey:@"titleTextColor"];
[alertController addAction:ok];
[alertController addAction:cancel];
[alertController.view setTintColor:[UIColor yellowColor]];
[self presentViewController:alertController animated:YES completion:nil];

Swift 3

let alertController = UIAlertController(title: "Title text", message: "Message text", preferredStyle: .alert)
let ok = UIAlertAction(title: "Yes" , style: .default) { (_ action) in
             //code here…
        }
let cancel = UIAlertAction(title: "Later" , style: .default) { (_ action) in
            //code here…
        }
ok.setValue(UIColor.green, forKey: "titleTextColor")
cancel.setValue(UIColor.red, forKey: "titleTextColor")
alertController.addAction(ok)
alertController.addAction(cancel)
alertController.view.tintColor = .yellow
self.present(alertController, animated: true, completion: nil)

Solution 4

I was able to solve this by subclassing UIAlertController:

class MyUIAlertController: UIAlertController {

    override func viewWillLayoutSubviews() {
        super.viewWillLayoutSubviews()

        //set this to whatever color you like...
        self.view.tintColor = UIColor.blackColor()
    }
}

This survives a device rotation while the alert is showing.

You also don't need to set the tintColor after presenting the alert when using this subclass.

Though it isn't necessary on iOS 8.4, this code does work on iOS 8.4 as well.

Objective-C implementation should be something like this:

@interface MyUIAlertController : UIAlertController
@end

@implementation MyUIAlertController
-(void)viewWillLayoutSubviews {
    [super viewWillLayoutSubviews];

    //set this to whatever color you like...
    self.view.tintColor = [UIColor blackColor];
}
@end

Solution 5

swift3

Tried to use UIView.appearance(whenContainedInInstancesOf: [UIAlertController.self]).tintColor = MyColor but this prevents other items unrelated to the UIAlertController from tintColor configuration. I saw it while trying to change the color of navigation bar button items.

I switched to an extension (based on Mike Taverne's response above) and it works great.

extension UIAlertController {

override open func viewWillLayoutSubviews() {
    super.viewWillLayoutSubviews()

    //set this to whatever color you like...
    self.view.tintColor = MyColor
}
}

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