How to change UIAlertController button color universally in ObjC

Question

this question is similar to this

But, instead of changing the color in every UIAlertController, I want to change it universal like 'AppDelegate'. So, If I change the color in one place, then all the alert controller action button should change to the new color. My question is:

1. Is it possible to do it from AppDelegate? If not, how can I do it?
2. Will Apple approve to change the button color to custom in all iOS Versions?

Answer 1

Yes, It's possible. Add the following line in AppDelegate and all the UIAlertControllers will set the tint color!

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

Answer 2

Yes,you can do it. Do one thing:

1. make a subclass of UIAlertController Class say MyAlertController
2. in .m file in viewDidLoad method write

self.view.tintColor = [UIColor requiredColor];

it will change the button color. It will work :)

Answer 3

Below is .h file

@interface MyAlertController : UIAlertController

@end

Below is .m file

@interface MyAlertController ()

@end

@implementation MyAlertController

- (void)viewDidLoad
{

[super viewDidLoad];
    self.view.tintColor = [UIColor redColor];

}