利用Runtime来拦截UIButton的点击事件，防止重复点击

对于公司原来的一些代码，想对UIButton的点击事件做一部分修改，但是如果使用继承出来的UIBtton来解决的话， 又要改大量的代码，这时候，使用runtime拦截替换发送点击事件的方法可以迅速解决这个问题，超级给力！

不废话，直接上代码

#import <UIKit/UIKit.h>

@interface UIControl (UIControl_XY)
@property (nonatomic, assign) NSTimeInterval cjr_acceptEventInterval;// 可以用这个给重复点击加间隔
@end

#import "UIControl+UIControl_XY.h"
#import <objc/runtime.h>

@interface UIControl()
@property (nonatomic, assign) NSTimeInterval cjr_acceptEventTime;
@end

@implementation UIControl (UIControl_XY)
static const char *UIControl_acceptEventInterval = "UIControl_acceptEventInterval";
static const char *UIControl_acceptEventTime = "UIControl_acceptEventTime";
- (NSTimeInterval )cjr_acceptEventInterval{
return [objc_getAssociatedObject(self, UIControl_acceptEventInterval) doubleValue];
}

- (void)setCjr_acceptEventInterval:(NSTimeInterval)cjr_acceptEventInterval{
objc_setAssociatedObject(self, UIControl_acceptEventInterval, @(cjr_acceptEventInterval), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (NSTimeInterval )cjr_acceptEventTime{
return [objc_getAssociatedObject(self, UIControl_acceptEventTime) doubleValue];
}

- (void)setCjr_acceptEventTime:(NSTimeInterval)cjr_acceptEventTime{
objc_setAssociatedObject(self, UIControl_acceptEventTime, @(cjr_acceptEventTime), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

+ (void)load{
//获取着两个方法
Method systemMethod = class_getInstanceMethod(self, @selector(sendAction:to:forEvent:));
SEL sysSEL = @selector(sendAction:to:forEvent:);

Method myMethod = class_getInstanceMethod(self, @selector(cjr_sendAction:to:forEvent:));
SEL mySEL = @selector(cjr_sendAction:to:forEvent:);

//添加方法进去
BOOL didAddMethod = class_addMethod(self, sysSEL, method_getImplementation(myMethod), method_getTypeEncoding(myMethod));

//如果方法已经存在了
if (didAddMethod) {
class_replaceMethod(self, mySEL, method_getImplementation(systemMethod), method_getTypeEncoding(systemMethod));
}else{
method_exchangeImplementations(systemMethod, myMethod);

}

//----------------以上主要是实现两个方法的互换,load是gcd的只shareinstance，果断保证执行一次

}

- (void)cjr_sendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event{
if (NSDate.date.timeIntervalSince1970 - self.cjr_acceptEventTime < self.cjr_acceptEventInterval) {
return;
}

if (self.cjr_acceptEventInterval > 0) {
self.cjr_acceptEventTime = NSDate.date.timeIntervalSince1970;
}

[self cjr_sendAction:action to:target forEvent:event];
}
@end

@interface ALViewController ()
@property (nonatomic, strong) UIButton *;
@end

@implementation AutoLayoutViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.suggessBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[self.suggessBtn addTarget:self action:@selector(clickWithInterval:) forControlEvents:UIControlEventTouchUpInside];
self.suggessBtn.cjr_acceptEventInterval = 5.0f;
}

- (void)clickWithInterval:(UIButton *)suButton{
NSLog(@"打印出来－－"):
}