1 #import <UIKit/UIKit.h> 2 3 @class MyBlockButton; // 此處一定要聲明 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 // 按鈕邊框美化11 self.layer.borderWidth = 1;12 self.layer.borderColor = [UIColor lightGrayColor].CGColor;13 self.layer.cornerRadius = 3;14 self.layer.masksToBounds = YES;15 16 // 為按鈕添加陰影17 self.layer.shadowColor = [UIColor blackColor].CGColor;18 self.layer.shadowOffset = CGSizeMake(3, 3);19 self.layer.shadowRadius = 3;20 21 // 調(diào)用此方法以觸發(fā)block22 [self addTarget:self action:@selector(clickAction:) forControlEvents:UIControlEventTouchUpInside];23 }24 return self;25 }26 27 - (void)clickAction:(MyBlockButton *)button28 {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 // 創(chuàng)建一個(gè)"確定按鈕"14 MyBlockButton *button = [[MyBlockButton alloc]initWithFrame:CGRectMake(35, 100, 260, 30)];15 [button setTitle:@"確定" forState:UIControlStateNormal];16 [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];17 button.backgroundColor = [UIColor orangeColor];18 [button setBlock:^(MyBlockButton *blockButton) {19 NSLog(@"按鈕被點(diǎn)擊了");20 }];21 [self.view addSubview:button];22 23 // 創(chuàng)建三個(gè)數(shù)字按鈕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(@"按鈕%d被點(diǎn)擊了",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
其運(yùn)行效果如下:
(2)接下來給出的方法中,使用自定義方法調(diào)用block;繼承自UIButton,在初始化使用的時(shí)候還需要設(shè)置其樣式.
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 // 自定義方法,調(diào)用block10 - (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 // 調(diào)用此方法以觸發(fā)block 9 [self addTarget:self action:@selector(clickButton:) forControlEvents:UIControlEventTouchUpInside];10 }11 12 - (void)clickButton:(UIButton *)button13 {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:@"確定" forState:UIControlStateNormal];16 [buttonBlock setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];17 buttonBlock.backgroundColor = [UIColor orangeColor];18 19 [buttonBlock clikAction:^(UIButton *button) {20 NSLog(@"按鈕被點(diǎn)擊了!");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
其運(yùn)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 // 自定義初始化方法10 - (instancetype)initWithTitle:(NSString *)title11 message:(NSString *)message12 cancelButtonTitle:(NSString *)cancelButtonTitle13 otherButtonTitles:(NSString *)otherButtonTitles14 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 // 先初始化父類的方法 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(這只是一個(gè)提示,不需要簽訂代理協(xié)議)16 - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex17 {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 // 創(chuàng)建一個(gè)UIButton(用于彈出UIAlertView)14 UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];15 button.frame = CGRectMake(35, 100, 260, 30);16 button.backgroundColor = [UIColor orangeColor];17 [button setTitle:@"確定" 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 // 按鈕點(diǎn)擊方法24 - (void)clickAction:(UIButton *)button {25 MyAlertViewBlock *alertView = [[MyAlertViewBlock alloc]initWithTitle:@"測(cè)試"message:@"將UIAlertView的按鈕點(diǎn)擊事件代理用block實(shí)現(xiàn)" cancelButtonTitle:@"取消"otherButtonTitles:@"確定"andTouchBlock:^(NSInteger buttonIndex) {26 //在這里面執(zhí)行觸發(fā)的行為，省掉了代理，這樣的好處是在使用多個(gè)Alert的時(shí)候可以明確定義各自觸發(fā)的行為，不需要在代理方法里判斷是哪個(gè)Alert了27 if (buttonIndex == 0) {28 NSLog(@"取消");29 } else if (buttonIndex == 1) {30 NSLog(@"確定");31 }32 }];33 34 [alertView show];35 }36 37 @end
其運(yùn)行效果如下:
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