UIControl类防止重复暴力点击方法汇总

一、按钮点击后先取消之前的操作

- (void)buttonClicked:(id)sender{
//点击按钮后先取消之前的操作，再进行需要进行的操作
[[self class]cancelPreviousPerformRequestsWithTarget:selfselector:@selector(buttonClicked:) object:sender];
}

二、按钮点击后设为不可点击状态，几秒后恢复

-(void)buttonClicked:(id)sender{
self.button.enabled = NO;
[self performSelector:@selector(changeButtonStatus) withObject:nil afterDelay:1.0f];//防止重复点击
}
-(void)changeButtonStatus{
self.button.enabled =YES;
}

三、使用runtime

#import 
@interface UIControl (repeatedClick)
/**
 可以重复点击的时间间隔
 默认为0 不对按钮重复点击处理
 */
@property (nonatomic,assign) NSTimeInterval timeInterval;//用这个给重复点击加间隔
/**
 内部属性用于判断是否忽略替换的点击事件
 */
@property (nonatomic,assign) BOOL isIgnoreEvent;
@end

#import "UIControl+repeatedClick.h"
#import 
#define defaultInterval 0.25    //默认时间间隔  

@implementation UIControl (repeatedClick)
- (NSTimeInterval)timeInterval{
    return [objc_getAssociatedObject(self,_cmd)doubleValue];
}

- (void)setTimeInterval:(NSTimeInterval)timeInterval{
   objc_setAssociatedObject(self,@selector(timeInterval),@(timeInterval),OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (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];
}
@end