前言

• 我又来偷懒来了，
• UIButton同样也是我们经常使用到的控件，那么常规我们为按钮绑定点击事件都是写一个方法，然后绑定这样子，一如既往我还是比较喜欢东西放在一起找起来也方便，于是有了下面的封装处理
  之前写过一篇UIView的手势点击，这两基本就解决了大部分常规的点击处理
  iOS UIView添加手势回调 . 将偷懒进行到底 - -|

. Demo地址

API

/// 添加点击事件，默认UIControlEventTouchUpInside
- (void)kj_addAction:(KJButtonBlock)block;
/// 添加事件，不支持多枚举形式
- (void)kj_addAction:(KJButtonBlock)block forControlEvents:(UIControlEvents)controlEvents;

常规对比

常规做法

[_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");
}

封装之后做法

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

------- 🎈 给我点赞 🎈 -------
编译时间:16:51:45
文件名:KJButtonVC.m
方法名:-[KJButtonVC button]_block_invoke_2
行号:128
打印信息:UIControlEventTouchDown

------- 🎈 给我点赞 🎈 -------
编译时间:16:51:45
文件名:KJButtonVC.m
方法名:-[KJButtonVC button]_block_invoke
行号:125
打印信息:UIControlEventTouchUpInside

简单介绍

1. 暂时支持UIControlEvents九种类型

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. 事件响应方法处理

我喜欢偷懒所以采用宏的方式处理

#define KJButtonAction(name) \
- (void)kj_action##name{ \
KJButtonBlock block = objc_getAssociatedObject(self, _cmd);\
if (block) block(self);\
}
/// 事件响应方法
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:

事件处理

/// 添加点击事件，默认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];
}

分别说说三种return的情况

• block ：回调未处理
• controlEvents>(1<<8) ：超出九种情况
• controlEvents&1 ：多枚举情况

4. 获取每种UIControlEvents对应的绑定方法

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

5. 回调和绑定方法

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

6. 获取回调处理

获取每种方法对应的回调

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

友情提醒

• 暂时我只封装了上述的九种点击方式，其余的暂未处理
• 暂时不支持多枚举，例如如下方式是不支持的

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

备注：本文用到的部分函数方法和Demo，均来自三方库KJCategories，如有需要的朋友可自行pod 'KJCategories'引入即可

UIButton点击快捷回调介绍就到此完毕，后面有相关再补充，写文章不容易，还请点个小星星传送门