action sheet 也来 block ～

https://github.com/emenegro/action-sheet-blocks

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

Installation instructions

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

2. You has to create the sheet the regular way

   UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"Test"
                                                      delegate:nil // Can be another value but will be overridden when showing with handler.
                                             cancelButtonTitle:@"Cancel"
                                        destructiveButtonTitle:@"Delete"
                                             otherButtonTitles:@"Option 1", @"Option 2", nil];
   

3. Now you have several new methods to show the sheet passing the completion handler.

   [sheet showInView:view
             handler:^(UIActionSheet *actionSheet, NSInteger buttonIndex) {
   
                 if (buttonIndex == [actionSheet cancelButtonIndex]) {
   
                     NSLog(@"Cancel button index tapped");
   
                 } else if (buttonIndex == [actionSheet destructiveButtonIndex]) {
   
                     NSLog(@"Destructive button index tapped");
   
                 } else  {
   
                     NSLog(@"Button %i tapped", buttonIndex);
                 }                      
             }];
   

4. For each method in UIActionSheet that shows a sheet there is a new method with the same signature but that also passes the handler.

   - (void)showInView:(UIView *)view handler:(UIActionSheetHandler)handler;
   - (void)showFromBarButtonItem:(UIBarButtonItem *)item animated:(BOOL)animated handler:(UIActionSheetHandler)handler;
   - (void)showFromRect:(CGRect)rect inView:(UIView *)view animated:(BOOL)animated handler:(UIActionSheetHandler)handler;
   - (void)showFromTabBar:(UITabBar *)view handler:(UIActionSheetHandler)handler;
   - (void)showFromToolbar:(UIToolbar *)view handler:(UIActionSheetHandler)handler;
   

5. You can see some examples in ViewController class.