1 #import <UIKit/UIKit.h>
 2 
 3 @class MyBlockButton;      // 此处一定要声明
 4 typedef void(^TouchBlock)(MyBlockButton *button);
 5 
 6 @interface MyBlockButton : UIButton
 7 
 8 @PRoperty (copy, nonatomic) TouchBlock block;
 9 
10 @end    

MyBlockButton.m

 1 #import "MyBlockButton.h"
 2 
 3 @implementation MyBlockButton
 4 
 5 -(instancetype)initWithFrame:(CGRect)frame
 6 {
 7     self = [super initWithFrame:frame];
 8     
 9     if (self) {
10         // 按钮边框美化
11         self.layer.borderWidth = 1;
12         self.layer.borderColor = [UIColor lightGrayColor].CGColor;
13         self.layer.cornerRadius = 3;
14         self.layer.masksToBounds = YES;
15         
16         // 为按钮添加阴影
17         self.layer.shadowColor = [UIColor blackColor].CGColor;
18         self.layer.shadowOffset = CGSizeMake(3, 3);
19         self.layer.shadowRadius = 3;
20         
21         // 调用此方法以触发block
22         [self addTarget:self action:@selector(clickAction:) forControlEvents:UIControlEventTouchUpInside];
23     }
24     return self;
25 }
26 
27 - (void)clickAction:(MyBlockButton *)button
28 {
29     _block(button);
30 }
31 
32 @end

ViewController.m

 1 #import "ViewController.h"
 2 #import "MyBlockButton.h"
 3 
 4 @interface ViewController ()
 5 
 6 @end
 7 
 8 @implementation ViewController
 9 
10 - (void)viewDidLoad {
11     [super viewDidLoad];
12     
13     // 创建一个"确定按钮"
14     MyBlockButton *button = [[MyBlockButton alloc]initWithFrame:CGRectMake(35, 100, 260, 30)];
15     [button setTitle:@"确定" forState:UIControlStateNormal];
16     [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
17     button.backgroundColor = [UIColor orangeColor];
18     [button setBlock:^(MyBlockButton *blockButton) {
19         NSLog(@"按钮被点击了");
20     }];
21     [self.view addSubview:button];
22     
23     // 创建三个数字按钮
24     for (int i = 1; i <= 3; i ++) {
25         MyBlockButton *btn = [[MyBlockButton alloc]initWithFrame:CGRectMake(70 * i, 200, 60, 30)];
26         [btn setTitle:[NSString stringWithFormat:@"%d",i] forState:UIControlStateNormal];
27         [btn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
28         btn.backgroundColor = [UIColor redColor];
29         btn.block = ^(MyBlockButton *blockBtn) {
30             NSLog(@"按钮%d被点击了",i);
31         };
32         
33         [self.view addSubview:btn];
34     }
35 }
36 
37 - (void)didReceiveMemoryWarning {
38     [super didReceiveMemoryWarning];
39     // Dispose of any resources that can be recreated.
40 }
41 
42 @end

其运行效果如下:

(2)接下来给出的方法中,使用自定义方法调用block;继承自UIButton,在初始化使用的时候还需要设置其样式.

MyButtonBlock.h

 1 #import <UIKit/UIKit.h>
 2 
 3 typedef void(^TouchBlock)(UIButton *button);
 4 
 5 @interface MyButtonBlock : UIButton
 6 
 7 @property (copy, nonatomic) TouchBlock block;
 8 
 9 // 自定义方法,调用block
10 - (void)clikAction:(TouchBlock)block;
11 
12 @end

MyButtonBlock.m

 1 #import "MyButtonBlock.h"
 2 
 3 @implementation MyButtonBlock
 4 
 5 - (void)clikAction:(TouchBlock)block
 6 {
 7     _block = block;
 8     // 调用此方法以触发block
 9     [self addTarget:self action:@selector(clickButton:) forControlEvents:UIControlEventTouchUpInside];
10 }
11 
12 - (void)clickButton:(UIButton *)button
13 {
14     _block(button);
15 }
16 
17 @end

ViewController.m

 1 #import "ViewController.h"
 2 #import "MyButtonBlock.h"
 3 
 4 @interface ViewController ()
 5 
 6 @end
 7 
 8 @implementation ViewController
 9 
10 - (void)viewDidLoad {
11     [super viewDidLoad];
12     
13     MyButtonBlock *buttonBlock = [MyButtonBlock buttonWithType:UIButtonTypeCustom];
14     buttonBlock.frame = CGRectMake(35, 100, 300, 30);
15     [buttonBlock setTitle:@"确定" forState:UIControlStateNormal];
16     [buttonBlock setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
17     buttonBlock.backgroundColor = [UIColor orangeColor];
18 
19     [buttonBlock clikAction:^(UIButton *button) {
20         NSLog(@"按钮被点击了!");
21     }];
22     
23     [self.view addSubview:buttonBlock];
24 }
25 
26 - (void)didReceiveMemoryWarning {
27     [super didReceiveMemoryWarning];
28     // Dispose of any resources that can be recreated.
29 }
30 
31 @end

其运行效果如下:

 1 #import <UIKit/UIKit.h>
 2 
 3 typedef void(^TouchBlock)(NSInteger buttonIndex);
 4 
 5 @interface MyAlertViewBlock : UIAlertView
 6 
 7 @property (copy, nonatomic) TouchBlock block;
 8 
 9 // 自定义初始化方法
10 - (instancetype)initWithTitle:(NSString *)title
11                       message:(NSString *)message
12             cancelButtonTitle:(NSString *)cancelButtonTitle
13             otherButtonTitles:(NSString *)otherButtonTitles
14                 andTouchBlock:(TouchBlock)block;
15 
16 @end

MyAlertViewBlock.m

 1 #import "MyAlertViewBlock.h"
 2 
 3 @implementation MyAlertViewBlock
 4 
 5 - (instancetype)initWithTitle:(NSString *)title message:(NSString *)message cancelButtonTitle:(NSString *)cancelButtonTitle otherButtonTitles:(NSString *)otherButtonTitles andTouchBlock:(TouchBlock)block
 6 {
 7     // 先初始化父类的方法
 8     self = [super initWithTitle:title message:message delegate:self cancelButtonTitle:cancelButtonTitle otherButtonTitles:otherButtonTitles, nil];
 9     if (self) {
10         self.block = block;
11     }
12     return self;
13 }
14 
15 #pragma mark - UIAlertViewDelegate(这只是一个提示,不需要签订代理协议)
16 - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
17 {
18     _block(buttonIndex);
19 }
20 
21 @end

ViewController.m

 1 #import "ViewController.h"
 2 #import "MyAlertViewBlock.h"
 3 
 4 @interface ViewController ()
 5 
 6 @end
 7 
 8 @implementation ViewController
 9 
10 - (void)viewDidLoad {
11     [super viewDidLoad];
12     
13     // 创建一个UIButton(用于弹出UIAlertView)
14     UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
15     button.frame = CGRectMake(35, 100, 260, 30);
16     button.backgroundColor = [UIColor orangeColor];
17     [button setTitle:@"确定" forState:UIControlStateNormal];
18     [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
19     [button addTarget:self action:@selector(clickAction:) forControlEvents:UIControlEventTouchUpInside];
20     [self.view addSubview:button];
21 }
22 
23 // 按钮点击方法
24 - (void)clickAction:(UIButton *)button {
25     MyAlertViewBlock *alertView = [[MyAlertViewBlock alloc]initWithTitle:@"测试"message:@"将UIAlertView的按钮点击事件代理用block实现" cancelButtonTitle:@"取消"otherButtonTitles:@"确定"andTouchBlock:^(NSInteger buttonIndex) {
26          //在这里面执行触发的行为，省掉了代理，这样的好处是在使用多个Alert的时候可以明确定义各自触发的行为，不需要在代理方法里判断是哪个Alert了
27         if (buttonIndex == 0) {
28             NSLog(@"取消");
29         } else if (buttonIndex == 1) {
30             NSLog(@"确定");
31         }
32     }];
33     
34     [alertView show];
35 }
36 
37 @end

其运行效果如下: