iOS防止Button多次点击终极解决方案！

目标：使按钮在单位时间间隔内只能点击一次。

创建分类：UIButton+TimeInterval

使用时：异常简单，和普通的按钮用法一模一样，只是需要多加一个属性。

// 关键属性，设置每隔多少秒按钮可点
btn.timeInterval = 2;

代码：UIButton+TimeInterval.h

#import <UIKit/UIKit.h>
@interface UIButton (TimeInterval)

/**
 点击时间间隔
 */
@property (nonatomic, assign) NSTimeInterval timeInterval;

@end

UIButton+TimeInterval.m

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

@interface UIButton ()

/**
 是否忽略响应事件
 */
@property (nonatomic, assign) BOOL isIgnoreEvent;

@end

@implementation UIButton (TimeInterval)

/**
 应用启动时，hook住所有按钮的event
 */
+ (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);
        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{
            method_exchangeImplementations(methodA, methodB);
        }
    });
}

- (void)mySendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event
{
    if ([NSStringFromClass(self.class) isEqualToString:@"UIButton"]) {
        if (self.isIgnoreEvent) {
            return;
        }

        if (self.timeInterval > 0)
        {
            self.isIgnoreEvent = YES;
            [self performSelector:@selector(setIsIgnoreEvent:) withObject:@(NO) afterDelay:self.timeInterval];
        }

    }
    [self mySendAction:action to:target forEvent:event];
}

// MARK: - 运行时设置分类属性
- (NSTimeInterval)timeInterval
{
    return [objc_getAssociatedObject(self, _cmd) doubleValue];
}
- (void)setTimeInterval:(NSTimeInterval)timeInterval
{
    objc_setAssociatedObject(self, @selector(timeInterval), @(timeInterval), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (BOOL)isIgnoreEvent{
    return [objc_getAssociatedObject(self, _cmd) boolValue];
}
- (void)setIsIgnoreEvent:(BOOL)isIgnoreEvent{
    objc_setAssociatedObject(self, @selector(isIgnoreEvent), @(isIgnoreEvent), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

@end