防止按钮被重复点击
避免一个button被多次点击(共总结了3种)
第一种:每次在点击时先取消之前的操作
将这段代码放在你按钮点击的方法中,例如:
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- (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[[selfclass]cancelPreviousPerformRequestsWithTarget:selfselector:@selector(buttonClicked:)object:sender];[selfperformSelector:@selector(buttonClicked: )withObject:senderafterDelay:0.2f];} |
第二种:点击后设为不可被点击的状态,几秒后恢复:
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-(void)buttonClicked:(id)sender{self.button.enabled =NO;[selfperformSelector:@selector(changeButtonStatus)withObject:nilafterDelay:1.0f];//防止重复点击}-(void)changeButtonStatus{self.button.enabled =YES;} |
第三种:使用runtime,一劳永逸我这设的是0.5秒内不会被重复点击
1.导入objc / runtime.h(可以放在PCH文件里)
2.创建uicontrol或UIButton的的分类!
创建分类文件:
2.1 打开Xcode中,新建文件,选择OC文件
2.2 在第二个界面,File名为UIControl+UIControl_buttonCon,将文件类型File Type选为Category类,在类里选继承的类别,这里咱们选的Class是UIButton
注:若用Unbutton分类,则会对对Unbutton创建的按钮反应。
2.3 分类创建完毕对分类进行操作
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.h文件
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#import#define defaultInterval.5//默认时间间隔@interfaceUIControl (UIControl_buttonCon)@property(nonatomic,assign)NSTimeIntervaltimeInterval;//用这个给重复点击加间隔@property(nonatomic,assign)BOOLisIgnoreEvent;//YES不允许点击NO允许点击@end |
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.m文件
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#import"UIControl+UIControl_buttonCon.h"@implementationUIControl (UIControl_buttonCon)- (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{[selfsetIsIgnoreEvent:NO];}+ (void)load{staticdispatch_once_tonceToken;dispatch_once(&onceToken, ^{SELselA =@selector(sendAction:to:forEvent:);SELselB =@selector(mySendAction:to:forEvent:);MethodmethodA =class_getInstanceMethod(self, selA);MethodmethodB =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BOOLisAdd =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;}elseif(self.timeInterval>0){[selfperformSelector:@selector(resetState)withObject:nilafterDelay: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;[selfmySendAction:actionto:targetforEvent:event];}@end |

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