ios UIButton點擊快捷回調 前言

前言

• 我又來偷懶來了，
• UIButton同樣也是我們經常使用到的控件，那麼常規我們爲按鈕綁定點擊事件都是寫一個方法，然後綁定這樣子，一如既往我還是比較喜歡東西放在一起找起來也方便，於是有了下面的封裝處理
  之前寫過一篇UIView的手勢點擊，這兩基本就解決了大部分常規的點擊處理
  iOS UIView添加手勢回調 . 將偷懶進行到底 - -|

API

/// 添加點擊事件，默認UIControlEventTouchUpInside
- (void)kj_addAction:(KJButtonBlock)block;
/// 添加事件，不支持多枚舉形式
- (void)kj_addAction:(KJButtonBlock)block forControlEvents:(UIControlEvents)controlEvents;

常規對比

常規做法

[_button addTarget:self action:@selector(action) forControlEvents:(UIControlEventTouchUpInside)];
[_button addTarget:self action:@selector(action2) forControlEvents:(UIControlEventTouchDown)];

/// Action
- (void)action{
    NSLog(@"UIControlEventTouchUpInside");
}
- (void)action2{
    NSLog(@"UIControlEventTouchDown");
}

封裝之後做法

[_button kj_addAction:^(UIButton * _Nonnull kButton) {
    NSLog(@"UIControlEventTouchUpInside");
}];
[_button kj_addAction:^(UIButton * _Nonnull kButton) {
    NSLog(@"UIControlEventTouchDown");
} forControlEvents:(UIControlEventTouchDown)];

------- 🎈 給我點贊 🎈 -------
編譯時間:16:51:45
文件名:KJButtonVC.m
方法名:-[KJButtonVC button]_block_invoke_2
行號:128
打印信息:UIControlEventTouchDown

------- 🎈 給我點贊 🎈 -------
編譯時間:16:51:45
文件名:KJButtonVC.m
方法名:-[KJButtonVC button]_block_invoke
行號:125
打印信息:UIControlEventTouchUpInside

簡單介紹

1. 暫時支持UIControlEvents九種類型

static NSString * const _Nonnull KJButtonControlEventsStringMap[] = {
    [UIControlEventTouchDown]        = @"KJ_X_UIControlEventTouchDown",
    [UIControlEventTouchDownRepeat]  = @"KJ_X_UIControlEventTouchDownRepeat",
    [UIControlEventTouchDragInside]  = @"KJ_X_UIControlEventTouchDragInside",
    [UIControlEventTouchDragOutside] = @"KJ_X_UIControlEventTouchDragOutside",
    [UIControlEventTouchDragEnter]   = @"KJ_X_UIControlEventTouchDragEnter",
    [UIControlEventTouchDragExit]    = @"KJ_X_UIControlEventTouchDragExit",
    [UIControlEventTouchUpInside]    = @"KJ_X_UIControlEventTouchUpInside",
    [UIControlEventTouchUpOutside]   = @"KJ_X_UIControlEventTouchUpOutside",
    [UIControlEventTouchCancel]      = @"KJ_X_UIControlEventTouchCancel",
};

2. 事件響應方法處理

我喜歡偷懶所以採用宏的方式處理

#define KJButtonAction(name) \
- (void)kj_action##name{ \
KJButtonBlock block = objc_getAssociatedObject(self, _cmd);\
if (block) block(self);\
}
/// 事件響應方法
KJButtonAction(KJ_X_UIControlEventTouchDown);
KJButtonAction(KJ_X_UIControlEventTouchDownRepeat);
KJButtonAction(KJ_X_UIControlEventTouchDragInside);
KJButtonAction(KJ_X_UIControlEventTouchDragOutside);
KJButtonAction(KJ_X_UIControlEventTouchDragEnter);
KJButtonAction(KJ_X_UIControlEventTouchDragExit);
KJButtonAction(KJ_X_UIControlEventTouchUpInside);
KJButtonAction(KJ_X_UIControlEventTouchUpOutside);
KJButtonAction(KJ_X_UIControlEventTouchCancel);

3. kj_addAction:forControlEvents:

事件處理

/// 添加點擊事件，默認UIControlEventTouchUpInside
- (void)kj_addAction:(KJButtonBlock)block{
    [self kj_addAction:block forControlEvents:UIControlEventTouchUpInside];
}
/// 添加事件
- (void)kj_addAction:(KJButtonBlock)block forControlEvents:(UIControlEvents)controlEvents{
    if (block == nil || controlEvents>(1<<8)) return;
    if (controlEvents != UIControlEventTouchDown && (controlEvents&1)) return;
    NSString *actionName = [@"kj_action" stringByAppendingFormat:@"%@",KJButtonControlEventsStringMap[controlEvents]];
    SEL selector = NSSelectorFromString(actionName);
    objc_setAssociatedObject(self, selector, block, OBJC_ASSOCIATION_COPY_NONATOMIC);
    [self addTarget:self action:selector forControlEvents:controlEvents];
}

分別說說三種return的情況

• block ：回調未處理
• controlEvents>(1<<8) ：超出九種情況
• controlEvents&1 ：多枚舉情況

4. 獲取每種UIControlEvents對應的綁定方法

NSString *actionName = [@"kj_action" stringByAppendingFormat:@"%@",KJButtonControlEventsStringMap[controlEvents]];
SEL selector = NSSelectorFromString(actionName);

5. 回調和綁定方法

objc_setAssociatedObject(self, selector, block, OBJC_ASSOCIATION_COPY_NONATOMIC);
[self addTarget:self action:selector forControlEvents:controlEvents];

6. 獲取回調處理

獲取每種方法對應的回調

KJButtonBlock block = objc_getAssociatedObject(self, _cmd);
if (block) block(self);

友情提醒

• 暫時我只封裝了上述的九種點擊方式，其餘的暫未處理
• 暫時不支持多枚舉，例如如下方式是不支持的

[_button kj_addAction:^(UIButton * _Nonnull kButton) {
    NSLog(@"UIControlEventTouchDown");
} forControlEvents:(UIControlEventTouchDown)|(UIControlEventTouchUpInside)];

備註：本文用到的部分函數方法和Demo，均來自三方庫KJExtensionHandler，如有需要的朋友可自行pod 'KJExtensionHandler'引入即可

UIButton點擊快捷回調介紹就到此完畢，後面有相關再補充，寫文章不容易，還請點個小星星傳送門