alert-blocks's Introduction

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

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

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];

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);
     }
 }];

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;