(转)避免uibutton连续点击,多次触发响应事件

#import <UIKit/UIKit.h>
#define defaultInterval .7// 默认间隔时间
@interface UIButton (touch)
/**
*  设置点击时间间隔
*/
@property (nonatomic, assign) NSTimeInterval timeInterVal;
@end



#import "UIButton+touch.h"
#import <objc/runtime.h>

@interface UIButton ()
/**
*  bool 设置是否执行触及事件方法
*/
@property (nonatomic, assign) BOOL isExcuteEvent;
@end
@implementation UIButton (touch)

+ (void)load
{
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
SEL oldSel = @selector(sendAction:to:forEvent:);
SEL newSel = @selector(newSendAction:to:forEvent:);
// 获取到上面新建的oldsel方法
Method oldMethod = class_getInstanceMethod(self, oldSel);
// 获取到上面新建的newsel方法
Method newMethod = class_getInstanceMethod(self, newSel);
// IMP 指方法实现的指针,每个方法都有一个对应的IMP,调用方法的IMP指针避免方法调用出现死循环问题
/**
*  给oldSel添加方法
*
*  @param self      被添加方法的类
*  @param oldSel    被添加方法的方法名
*  @param newMethod 实现这个方法的函数
*  (@types 定义该函数返回值类型和参数类型的字符串)
*  @return 是否添加成功
想了解的可以查看下:
http://blog.csdn.net/lvmaker/article/details/32396167
*/
BOOL isAdd = class_addMethod(self, oldSel, method_getImplementation(newMethod), method_getTypeEncoding(newMethod));
if (isAdd) {
// 将newSel替换成oldMethod
class_replaceMethod(self, newSel, method_getImplementation(oldMethod), method_getTypeEncoding(oldMethod));
}else{
// 给两个方法互换实现
method_exchangeImplementations(oldMethod, newMethod);
}
});
}

- (void)newSendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event
{
if ([NSStringFromClass(self.class) isEqualToString:@"UIButton"]) {
if (self.isExcuteEvent == 0) {
self.timeInterVal = self.timeInterVal = 0? defaultInterval:self.timeInterVal;
}
if (self.isExcuteEvent) return;
if (self.timeInterVal > 0) {
self.isExcuteEvent = YES;
[self performSelector:@selector(setIsExcuteEvent:) withObject:nil afterDelay:self.timeInterVal];
}
}
[self newSendAction:action to:target forEvent:event];
}

- (NSTimeInterval)timeInterVal
{
// 动态获取关联对象
return [objc_getAssociatedObject(self, _cmd) doubleValue];
}

- (void)setTimeInterVal:(NSTimeInterval)timeInterVal
{
// 动态设置关联对象
objc_setAssociatedObject(self, @selector(timeInterVal), @(timeInterVal), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (void)setIsExcuteEvent:(BOOL)isExcuteEvent
{
// 动态设置关联对象
objc_setAssociatedObject(self, @selector(isExcuteEvent), @(isExcuteEvent), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (BOOL)isExcuteEvent
{
// 动态获取关联对象
return [objc_getAssociatedObject(self, _cmd) boolValue];
}

@end