解决方案：此方案只能解决连续点击的时候只响应第一次点击事件
使用runtime来对sendAction:to:forEvent:方法进行hook
分析：
UIControl的sendAction:to:forEvent:方法用于处理事件响应.
如果我们在该方法的实现中, 添加针对点击事件的时间间隔相关的处理代码, 则能够做到在指定时间间隔中防止重复点击.
@interface UIButton (MultiClick)
@property (nonatomic, assign) NSTimeInterval cs_acceptEventInterval; // 重复点击的间隔
@property (nonatomic, assign) NSTimeInterval cs_acceptEventTime;//事件点击的时间
@end
@implementation UIButton (MultiClick)
// 因category不能添加属性，只能通过关联对象的方式。
static const char *UIControl_acceptEventInterval = "UIControl_acceptEventInterval";
- (NSTimeInterval)cs_acceptEventInterval {
return [objc_getAssociatedObject(self, UIControl_acceptEventInterval) doubleValue];
}
- (void)setCs_acceptEventInterval:(NSTimeInterval)cs_acceptEventInterval {
objc_setAssociatedObject(self, UIControl_acceptEventInterval, @(cs_acceptEventInterval), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
static const char *UIControl_acceptEventTime = "UIControl_acceptEventTime";
- (NSTimeInterval)cs_acceptEventTime {
return [objc_getAssociatedObject(self, UIControl_acceptEventTime) doubleValue];
}
- (void)setCs_acceptEventTime:(NSTimeInterval)cs_acceptEventTime {
objc_setAssociatedObject(self, UIControl_acceptEventTime, @(cs_acceptEventTime), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
// 在load时执行hook
+ (void)load {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
Class class = [self class];
SEL originalSelector = @selector(sendAction:to:forEvent:);
SEL swizzledSelector = @selector(cs_sendAction:to:forEvent:);
Method originalMethod = class_getInstanceMethod(class, originalSelector);
Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector);
BOOL success = class_addMethod(class, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod));
if (success) {
class_replaceMethod(class, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod));
} else {
method_exchangeImplementations(originalMethod, swizzledMethod);
}
});
}
- (void)cs_sendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event {
if ([NSDate date].timeIntervalSince1970 - self.cs_acceptEventTime < self.cs_acceptEventInterval) {
return;
}
if (self.cs_acceptEventInterval > 0) {
self.cs_acceptEventTime = [NSDate date].timeIntervalSince1970;
}
[self cs_sendAction:action to:target forEvent:event];
}
@end
