UIAlertView & Block function

source

//

//  CustomUIAlertView.m

//  patternpie

//

//  Created by MYUNG GU KIM on 10/2/14.

//  Copyright (c) 2014 piestudio. All rights reserved.

//

#import "CustomUIAlertView.h"

@implementation CustomUIAlertView

- (void)showWithBlock:(void (^)(int selectedIndex))complete

{

    self.delegate = self;

    ptrComplete = complete;

    [self show];

}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex

{

    ptrComplete((int)buttonIndex);

}

@end

header 

//

//  CustomUIAlertView.h

//  patternpie

//

//  Created by MYUNG GU KIM on 10/2/14.

//  Copyright (c) 2014 piestudio. All rights reserved.

//

#import <UIKit/UIKit.h>

void (^ptrComplete)(int);

@interface CustomUIAlertView : UIAlertView <UIAlertViewDelegate>

{

}

- ( void )showWithBlock: ( void ( ^ )( int selectedIndex) )complete;

@end

using

[[[CustomUIAlertView alloc] initWithTitle:nil message:@"Do you want Challenge?" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:@"Cancel", nil] showWithBlock:^(int selectedIndex) {

            NSLog(@"You selected button %d", selectedIndex);

        }];