Category of UIAlertView need callback for alert button click iOS

Question

My scenario is as follows

1) I created a Category for UIAlertView class

//UIAlertView+Remove.m file
#import "UIAlertView+Remove.h"

@implementation UIAlertView (Remove)

- (void) hide {
    [self dismissWithClickedButtonIndex:0 animated:YES];
}

- (void)removeNotificationObserver
{
    [[NSNotificationCenter defaultCenter] removeObserver:self name:NSCalendarDayChangedNotification object:nil];
}

@end

2)Added a notification to UIAlertView object when its show

3)And I want to call removeNotificationObserver method when user click on any button in alertview to remove notification observer.

My tried out scinerios,

• Calling its from - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex delegate is not possible here because of delegate is not properly set to all alertview objects.

• Called it from a -dealloc method in category but -dealloc is not triggering when alertview close

Can anybody help me to get through this?

Answer 1

thank you for the responses!

Finally, I solved it myself by implementing SubClass for UIAlertView instead of using Category. Here I commented my code snippet, it may be helpful for those who experience same issue

//UIAlertView_AutoClose.m file

#import "UIAlertView_AutoClose.h"

@implementation UIAlertView_AutoClose

- (id)initWithTitle:(NSString *)title
            message:(NSString *)message
           delegate:(id)delegate
  cancelButtonTitle:(NSString *)cancelButtonTitle
  otherButtonTitles:(NSString *)otherButtonTitles, ...
{
    if(delegate == nil){
        delegate = self;
    }

    return [super initWithTitle:title message:message delegate:delegate cancelButtonTitle:cancelButtonTitle otherButtonTitles:otherButtonTitles, nil];
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    [[NSNotificationCenter defaultCenter] removeObserver:self name:NSCalendarDayChangedNotification object:nil];
    NSLog(@"Reached alertview_autoclose");
}

- (void) hide {
    [self dismissWithClickedButtonIndex:0 animated:YES];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:NSCalendarDayChangedNotification object:nil];
}

@end