Category of UIAlertView that offers a completion handler to listen to interaction. This avoids the need of the implementation of the delegate pattern.

Installation instructions

1. Import UIAlertView+Blocks.h in the desired classes of your project.

2. You has to create the alert the regular way

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Test alert view"
                                                    message:@"This is a test of an alert view with a completion block instead of the delegate pattern"
                                                   delegate:nil // Can be another value but will be overridden when showing with handler.
                                          cancelButtonTitle:@"Cancel"
                                          otherButtonTitles:@"Button 1", @"Button 2", nil];
   

3. Now you have a new method to show the alert that passes the completion handler

    [alert showWithHandler:^(UIAlertView *alertView, NSInteger buttonIndex) {
        
        if (buttonIndex == [alertView cancelButtonIndex]) {
            
            NSLog(@"You clicked the cancel button (index %i)", buttonIndex);
            
        } else {
            
            NSLog(@"You clicked the button at index %i", buttonIndex);
        }
    }];
   

4. There are some utility selectors to show common alerts.

    // Utility selector to show an alert with a title, a message and a button to dimiss.
    + (void)showWithTitle:(NSString *)title
                  message:(NSString *)message
                  handler:(UIAlertViewHandler)handler;
   
    // Utility selector to show an alert with an "Error" title, a message and a button to dimiss.
    + (void)showErrorWithMessage:(NSString *)message
                         handler:(UIAlertViewHandler)handler;
   
    // Utility selector to show an alert with a "Warning" title, a message and a button to dimiss.
    + (void)showWarningWithMessage:(NSString *)message
                           handler:(UIAlertViewHandler)handler;
   
    // Utility selector to show a confirmation dialog with a title, a message and two buttons to accept or cancel.
    + (void)showConfirmationDialogWithTitle:(NSString *)title
                                    message:(NSString *)message
                                    handler:(UIAlertViewHandler)handler;
   

5. You can see some examples in ViewController class.

Documentation

Execute appledoc appledoc.plist in the root of the project path to generate documentation.