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

 - (IBAction)clickBtn1:(UIbutton *)sender
 {
     sender.enabled = NO;
     doSomething
     sender.enabled = YES;
 }

2. 专门定义一个属性标记

 - (IBAction)clickBtn1:(UIbutton *)sender
 {
     if (doingSomeThing) return;
     doingSomeThing = YES;
     doSomething
     doingSomeThing = NO;
 }

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

 

 @implementation UIControl (MYButton)
 + (void)load
 {
     Method a = class_getInstanceMethod(self, @selector(sendAction:to:forEvent:));
     Method b = class_getInstanceMethod(self, @selector(__my_sendAction:to:forEvent:));
     method_exchangeImplementations(a, b);
 }
 @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 > )
     {
         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