iOS AlertViews with UIAlertController


Example

UIAlertView and UIActionSheet are Deprecated in iOS 8 and Later. So Apple introduced a new controller for AlertView and ActionSheet called UIAlertController , changing the preferredStyle, you can switch between AlertView and ActionSheet. There is no delegate method for it because all button events are handled in their blocks.

Simple AlertView

Swift:

let alert = UIAlertController(title: "Simple", message: "Simple alertView demo with Cancel and OK.", preferredStyle: .alert)

alert.addAction(UIAlertAction(title: "Cancel", style: .cancel) { _ in
        print("Cancel")
})
alert.addAction(UIAlertAction(title: "OK", style: .default) { _ in
        print("OK")
})

present(alert, animated: true)

Objective-C:

 UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Simple" message:@"Simple alertView demo with Cancel and OK." preferredStyle:UIAlertControllerStyleAlert];
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction * action) {
        NSLog(@"Cancel");
    }];
    UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) {
        NSLog(@"OK");
    }];
    
    [alertController addAction:cancelAction];
    [alertController addAction:okAction];
    [self presentViewController:alertController animated: YES completion: nil];

enter image description here

Destructive AlertView

Swift:

let alert = UIAlertController(title: "Simple", message: "Simple alertView demo with Cancel and OK.", preferredStyle: .alert)

alert.addAction(UIAlertAction(title: "Destructive", style: .destructive) { _ in
        print("Destructive")
})
alert.addAction(UIAlertAction(title: "OK", style: .default) { _ in
        print("OK")
})

present(alert, animated: true)

Objective-C:

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Destructive" message:@"Simple alertView demo with Destructive and OK." preferredStyle:UIAlertControllerStyleAlert];
    UIAlertAction *destructiveAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * action) {
        NSLog(@"Destructive");
    }];
    UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) {
        NSLog(@"OK");
    }];
    
    [alertController addAction:destructiveAction];
    [alertController addAction:okAction];
    [self presentViewController:alertController animated: YES completion: nil];

enter image description here