解决UIButton 连续点击重复响应事件问题

经常会遇到重复点击某个按钮事件被响应多次的情景, 有时候可能对程序本身并没有什么影响 , 可有时候偏偏需要限制button响应事件直接的间隔 .

方法一 : 标记

1 . 利用空闲enable属性来标记

1 - (IBAction)clickBtn1:(UIbutton *)sender
2 {
3     sender.enabled = NO;
4     doSomething
5     sender.enabled = YES;
6 }

2. 专门定义一个属性标记

1 - (IBAction)clickBtn1:(UIbutton *)sender
2 {
3     if (doingSomeThing) return;
4     doingSomeThing = YES;
5     doSomething
6     doingSomeThing = NO;
7 }

方法二 : 利用runtime来实现

和前一种方法的实现原理基本一样只不过通过给UIControl 添加分类由此扩大了应用范围

首先给按钮条件一个属性记录目标间隔时间

@interface UIControl (MYButton)
@property (nonatomic, assign) NSTimeInterval my_acceptEventInterval;   // 可以用这个给重复点击加间隔
@end
static const char *UIControl_acceptEventInterval = "UIControl_acceptEventInterval";
- (NSTimeInterval)my_acceptEventInterval
{
   return [objc_getAssociatedObject(self, UIControl_acceptEventInterval) doubleValue];
}
- (void)setMy_acceptEventInterval:(NSTimeInterval)my_acceptEventInterval
{
   objc_setAssociatedObject(self, UIControl_acceptEventInterval, @(my_acceptEventInterval), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

//交换系统的方法

1 @implementation UIControl (MYButton)
2 + (void)load
3 {
4     Method a = class_getInstanceMethod(self, @selector(sendAction:to:forEvent:));
5     Method b = class_getInstanceMethod(self, @selector(__my_sendAction:to:forEvent:));
6     method_exchangeImplementations(a, b);
7 }
8 @end

//定义自己的点击事件

- (void)__my_sendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event
{
   if (self.my_ignoreEvent) return;
   if (self.my_acceptEventInterval > 0)
   {
       self.my_ignoreEvent = YES;
       [self performSelector:@selector(setMy_ignoreEvent:) withObject:@(NO) afterDelay:self.my_acceptEventInterval];
   }
   [self __my_sendAction:action to:target forEvent:event];
}

实际使用起来就是这个样子

UIButton *tempBtn = [UIButton buttonWithType:UIButtonTypeCustom];
   [tempBtn addTarget:self action:@selector(clickWithInterval:) forControlEvents:UIControlEventTouchUpInside];
   tempBtn.uxy_acceptEventInterval = 0.5;

一个应用Runtime 的小小实例