一、.使用runtime解决
创建按钮的分类
.声明文件（.h）
#define defaultInterval .5//默认时间间隔
@interface UIButton (UIbutton_Delay)
@property(nonatomic,assign)NSTimeInterval timeInterval;//用这个给重复点击加间隔
@property(nonatomic,assign)BOOL isIgnoreEvent;//YES不允许点击NO允许点击
@end
.实现文件（.m）
#import <objc/runtime.h>
@implementation UIButton (UIbutton_Delay)
- (NSTimeInterval)timeInterval{
return[objc_getAssociatedObject(self,_cmd)doubleValue];
}
- (void)setTimeInterval:(NSTimeInterval)timeInterval{
objc_setAssociatedObject(self,@selector(timeInterval),@(timeInterval),OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
//runtime动态绑定属性
- (void)setIsIgnoreEvent:(BOOL)isIgnoreEvent{
objc_setAssociatedObject(self,@selector(isIgnoreEvent),@(isIgnoreEvent),OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (BOOL)isIgnoreEvent{
return[objc_getAssociatedObject(self,_cmd)boolValue];
}
- (void)resetState{
[self setIsIgnoreEvent:NO];
}
+ (void)load{
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
SEL selA =@selector(sendAction:to:forEvent:);
SEL selB =@selector(mySendAction:to:forEvent:);
Method methodA =class_getInstanceMethod(self, selA);
Method methodB =class_getInstanceMethod(self, selB);
//将methodB的实现添加到系统方法中也就是说将methodA方法指针添加成方法methodB的返回值表示是否添加成功
BOOL isAdd =class_addMethod(self, selA,method_getImplementation(methodB),method_getTypeEncoding(methodB));
//添加成功了说明本类中不存在methodB所以此时必须将方法b的实现指针换成方法A的，否则b方法将没有实现。
if(isAdd) {
class_replaceMethod(self, selB,method_getImplementation(methodA),method_getTypeEncoding(methodA));
}else{
//添加失败了说明本类中有methodB的实现，此时只需要将methodA和methodB的IMP互换一下即可。
method_exchangeImplementations(methodA, methodB);
}
});
}
- (void)mySendAction:(SEL)action to:(id)target forEvent:(UIEvent*)event{
if([NSStringFromClass(self.class)isEqualToString:@"UIButton"]) {
self.timeInterval=self.timeInterval==0?defaultInterval:self.timeInterval;
if(self.isIgnoreEvent){
return;
}else if(self.timeInterval>0){
[self performSelector:@selector(resetState) withObject:nil afterDelay:self.timeInterval];
}
}
//此处methodA和methodB方法IMP互换了，实际上执行sendAction；所以不会死循环
self.isIgnoreEvent=YES;
[self mySendAction:action to:target forEvent:event];
}
二、使用按钮的enable属性解决
三、每次在点击时先取消之前的操作
[[self class] cancelPreviousPerformRequestsWithTarget:self selector:@selector(buttonClicked:) object:sender];
[sel fperformSelector:@selector(buttonClicked: )withObject:sender afterDelay:0.2f];
