Block应用 UIAlertView来实现点击回调

TRYBlockAlertView.h

//
//  TRYBlockAlertView.h
//  HelloWorld
//
//  Created by Terry on 2013-10-07.
//  Copyright (c) 2013 Terry. All rights reserved.
//

#import <UIKit/UIKit.h>
typedef void(^ClickedBlock)(NSInteger);

@interface TRYBlockAlertView : UIAlertView

- (id)initWithTitle:(NSString *)title message:(NSString *)message cancelButtonTitle:(NSString *)cancelButtonTitle otherButtonTitle:(NSString *)otherButtonTitle clickedBlock:(ClickedBlock) clickedBlock;

@end

TRYBlockAlertView.m

//
//  TRYBlockAlertView.m
//  HelloWorld
//
//  Created by Terry on 2013-10-07.
//  Copyright (c) 2013 Terry. All rights reserved.
//

#import "TRYBlockAlertView.h"

@implementation TRYBlockAlertView

ClickedBlock clickedBlock;

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}

- (id)initWithTitle:(NSString *)title message:(NSString *)message cancelButtonTitle:(NSString *)cancelButtonTitle otherButtonTitle:(NSString *)otherButtonTitle clickedBlock:(ClickedBlock) block {
    self = [super initWithTitle:title message:message delegate:self cancelButtonTitle:cancelButtonTitle otherButtonTitles:otherButtonTitle, nil];
    if (self != nil) {
        clickedBlock = block;
    }
    return self;
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    clickedBlock(buttonIndex);
}


@end

usage.m

//
//  TRYViewController.m
//  HelloWorld
//
//  Created by Terry on 2013-10-07.
//  Copyright (c) 2013 Terry. All rights reserved.
//

#import "TRYViewController.h"
#import "TRYBlockAlertView.h"

@interface TRYViewController ()

@end

@implementation TRYViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
}

- (IBAction)btnClick:(id)sender {
    TRYBlockAlertView *alert = [[TRYBlockAlertView alloc]initWithTitle:@"Title" message:@"Message" cancelButtonTitle:@"Cancel" otherButtonTitle:@"Other" clickedBlock:^(NSInteger index) {
        switch (index) {
            case 0:
                NSLog(@"点了取消");
                break;
            case 1:
                NSLog(@"点了 Other");
                break;
            default:
                break;
        }
    }];
    [alert show];
}


@end