UIButton+Delay.h

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@interface UIButton (Delay)

/**
 按鈕獨(dú)有的防止被多次點(diǎn)擊的屬性
 */
@property (nonatomic, assign) NSTimeInterval eventTimeInterval;

@end

NS_ASSUME_NONNULL_END

UIButton+Delay.m

#import "UIButton+Delay.h"
#import <objc/runtime.h>
#define defaultInterval 5  //默認(rèn)時(shí)間間隔

@interface UIButton ()

/**
 bool YES 忽略點(diǎn)擊事件 NO 允許點(diǎn)擊事件
 */
@property (nonatomic, assign) BOOL isIgnoreEvent;

@end


@implementation UIButton (Delay)


static const char *UIControl_eventTimeInterval = "UIControl_eventTimeInterval";
static const char *UIControl_enventIsIgnoreEvent = "UIControl_enventIsIgnoreEvent";

// runtime 動態(tài)綁定 屬性
- (void)setIsIgnoreEvent:(BOOL)isIgnoreEvent {
    objc_setAssociatedObject(self, UIControl_enventIsIgnoreEvent, @(isIgnoreEvent), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (BOOL)isIgnoreEvent {
    return [objc_getAssociatedObject(self, UIControl_enventIsIgnoreEvent) boolValue];
}

- (NSTimeInterval)eventTimeInterval {
    return [objc_getAssociatedObject(self, UIControl_eventTimeInterval) doubleValue];
}

- (void)setEventTimeInterval:(NSTimeInterval)eventTimeInterval {
    objc_setAssociatedObject(self, UIControl_eventTimeInterval, @(eventTimeInterval), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

+ (void)load {
    // Method Swizzling
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        SEL selA = @selector(sendAction:to:forEvent:);
        SEL selB = @selector(_wpf_sendAction:to:forEvent:);
        Method methodA = class_getInstanceMethod(self,selA);
        Method methodB = class_getInstanceMethod(self, selB);
        
        BOOL isAdd = class_addMethod(self, selA, method_getImplementation(methodB), method_getTypeEncoding(methodB));
        
        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(shí)現(xiàn)，此時(shí)只需要將methodA和methodB的IMP互換一下即可。
            method_exchangeImplementations(methodA, methodB);
        }
    });
}

- (void)_wpf_sendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event {
    self.eventTimeInterval = self.eventTimeInterval == 0 ? defaultInterval : self.eventTimeInterval;
    if (self.isIgnoreEvent){
        return;
    }else if (self.eventTimeInterval > 0){
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(self.eventTimeInterval * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            [self setIsIgnoreEvent:NO];
        });
    }
    
    self.isIgnoreEvent = YES;
    // 這里看上去會陷入遞歸調(diào)用死循環(huán)，但在運(yùn)行期此方法是和sendAction:to:forEvent:互換的，相當(dāng)于執(zhí)行sendAction:to:forEvent:方法，所以并不會陷入死循環(huán)。
    [self _wpf_sendAction:action to:target forEvent:event];
}

@end