UIButton重复点击的bug解决方法

我们平时在写代码的时候，很少关注按钮重复点击的问题。这往往会导致程序的bug，轻则重复弹出页面，重则多次提交网络请求，导致app crash掉。

可以采用rumtime解决这个问题。

代码如下：

1、创建UIButton的分类

UIButton+OnceButton.h

#import <UIKit/UIKit.h>

@interface UIButton (OnceButton)

- (void)setT_acceptEventInterval:(NSTimeInterval)uxy_acceptEventInterval;


@end

UIButton+OnceButton.m

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

@interface UIControl (OnceButton)

@property (nonatomic, assign) NSTimeInterval t_acceptEventInterval;
@property (nonatomic)           BOOL            t_ignoreEvent;
@end

static const char *UIControl_acceptEventInterval = "UIControl_acceptEventInterval";
static const char *aaa = "abc";

@implementation UIControl (OnceButton)

@dynamic t_ignoreEvent;
- (NSTimeInterval)t_acceptEventInterval
{
    return [objc_getAssociatedObject(self, UIControl_acceptEventInterval) doubleValue];
}

- (void)setT_acceptEventInterval:(NSTimeInterval)uxy_acceptEventInterval
{
    objc_setAssociatedObject(self, UIControl_acceptEventInterval, @(uxy_acceptEventInterval), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}


- (BOOL)t_ignoreEvent
{
    return [objc_getAssociatedObject(self, aaa) boolValue];

}

- (void)setT_ignoreEvent:(BOOL)ignore
{
    objc_setAssociatedObject(self, aaa, @(ignore), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}


+ (void)load{
    Method a = class_getInstanceMethod(self, @selector(sendAction:to:forEvent:));
    Method b = class_getInstanceMethod(self, @selector(__t_sendAction:to:forEvent:));
    method_exchangeImplementations(a, b);
}

- (void)__t_sendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event
{
    
    
    if (self.t_ignoreEvent) return;
    if (self.t_acceptEventInterval > 0)
    {
        self.t_ignoreEvent = YES;
        [self performSelector:@selector(setT_ignoreEvent:) withObject:@(NO) afterDelay:self.t_acceptEventInterval];
        self.backgroundColor = [UIColor greenColor];
    }
    [self __t_sendAction:action to:target forEvent:event];
}

2、然后在ViewContrller.m里面这样调用

#import "ViewController.h"
#import "UIButton+OnceButton.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UIButton *tempBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    [tempBtn setFrame:CGRectMake(100, 100, 120, 30)];
    [tempBtn setBackgroundColor:[UIColor redColor]];
    [tempBtn addTarget:self action:@selector(clickWithInterval:) forControlEvents:UIControlEventTouchUpInside];

    [tempBtn setT_acceptEventInterval:6];
    [self.view addSubview:tempBtn];
    
}

- (void)clickWithInterval:(UIButton *)sender{
    NSLog(@"6s后可以执行");
}