iOS 8: UIAlertView / UIAlertController not showing text or buttons

Question

I have an UIAlertView which is getting shown perfectly in iOS 7 but in iOS 8, it does not show any buttons or labels. Alert is still visible but just a small white box. The OK and cancel buttons take their events as well but no texts are visible.

I have used this alert to show on click of a button

- (IBAction)sel_btnLogout:(id)sender {
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Logout!" message:@"Are you sure you want to logout?" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Ok", nil];
    [alert show];
}

I checked the frame in iOS 8: it is giving (0,0,0,0) but in iOS 7 it is giving a definite value.

I also checked for iterating into the subviews of uialertview. In iOS7, it goes in the loop, as it finds alert's subviews. In iOS8, it says there are no subviews of alertView.

Answer 1

Check if the class is available

if ([UIAlertController class])
{

    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Alert title" message:@"Alert message" preferredStyle:UIAlertControllerStyleAlert];

    UIAlertAction* ok = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:nil];
    [alertController addAction:ok];

    [self presentViewController:alertController animated:YES completion:nil];

} 
else 
{

    UIAlertView * alert = [[UIAlertView alloc]initWithTitle:@"Alert title" message:@"Alert message" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];

    [alert show];

}

Answer 2

With iOS 8 you can set the title instead of the message:

[[[UIAlertView alloc] initWithTitle:@"AlertView in iOS 8." message:nil delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]show];

UIAlertView is deprecated from iOS 8 for more information visit this

http://nshipster.com/uialertcontroller/. https://developer.apple.com/LIBRARY/IOS/documentation/UIKit/Reference/UIAlertViewDelegate_Protocol/index.html

So if you're going to write separate code for iOS 7 and iOS 8, you should be using UIAlertController instead:

UIAlertController *alertController = [UIAlertController  alertControllerWithTitle:@"AlertView in iOS 8"  message:nil  preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
 [self dismissViewControllerAnimated:YES completion:nil];
}]];
[self presentViewController:alertController animated:YES completion:nil];