一碉怔、.使用runtime解決
創(chuàng)建按鈕的分類
.聲明文件（.h）
#define defaultInterval .5//默認時間間隔
@interface UIButton (UIbutton_Delay)
@property(nonatomic,assign)NSTimeInterval timeInterval;//用這個給重復點擊加間隔
@property(nonatomic,assign)BOOL isIgnoreEvent;//YES不允許點擊NO允許點擊
@end
.實現(xiàn)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動態(tài)綁定屬性
- (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);
????????//將methodB的實現(xiàn)添加到系統(tǒng)方法中也就是說將methodA方法指針添加成方法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));
????????//添加成功了說明本類中不存在methodB所以此時必須將方法b的實現(xiàn)指針換成方法A的甥桂，否則b方法將沒有實現(xiàn)。
????????if(isAdd) {
????????????class_replaceMethod(self, selB,method_getImplementation(methodA),method_getTypeEncoding(methodA));
????????}else{
????????????//添加失敗了說明本類中有methodB的實現(xiàn)梧奢，此時只需要將methodA和methodB的IMP互換一下即可。
????????????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];
????????}
????}
????//此處methodA和methodB方法IMP互換了，實際上執(zhí)行sendAction；所以不會死循環(huán)
????self.isIgnoreEvent=YES;
????[self mySendAction:action to:target forEvent:event];
}
二蔬捷、使用按鈕的enable屬性解決
三、每次在點擊時先取消之前的操作
[[self class] cancelPreviousPerformRequestsWithTarget:self selector:@selector(buttonClicked:) object:sender];
[sel fperformSelector:@selector(buttonClicked:?)withObject:sender afterDelay:0.2f];
