Runtime优雅的解决UIButton多次点击(重复点击)

在实际开发中我们，点击一个button按键时，需要触发一个事件去执行。用户在正常操作情况下，单次点击时，button只会响应一次点击。但是如果用户多次点击一个button，那么就会引起这个事件被多次执行，导致一些bug的出现。

如何优雅解决的这个问题呢?今天我们来使用Runtime来解决UIButton重复点击的问题。

首先新建一个分类category，继承于UIControl,名字自己定义。 UIControl+ZHW.h(.h文件)

@interface UIControl (ZHW) @property (nonatomic, assign) NSTimeInterval zhw_acceptEventInterval;//添加点击事件的间隔时间

@property (nonatomic, assign) BOOL zhw_ignoreEvent;//是否忽略点击事件,不响应点击事件 @end

UIControl+ZHW.m(.m文件)在使用runtime时，需要导入相应的库(objc/runtime.h)

@implementation UIControl (ZHW) static const char *UIControl_acceptEventInterval = \"UIControl_acceptEventInterval\";

static const char *UIcontrol_ignoreEvent = \"UIcontrol_ignoreEvent\";

- (NSTimeInterval)zhw_acceptEventInterval {

return [objc_getAssociatedObject(self, UIControl_acceptEventInterval) doubleValue]; } -

(void)setZhw_acceptEventInterval:(NSTimeInterval)zhw_acceptEventInterval {

objc_setAssociatedObject(self, UIControl_acceptEventInterval, @(zhw_acceptEventInterval), OBJC_ASSOCIATION_RETAIN_NONATOMIC);

}

- (BOOL)zhw_ignoreEvent {

return [objc_getAssociatedObject(self, UIcontrol_ignoreEvent) boolValue]; }

- (void)setZhw_ignoreEvent:(BOOL)zhw_ignoreEvent {

objc_setAssociatedObject(self, UIcontrol_ignoreEvent, @(zhw_ignoreEvent), OBJC_ASSOCIATION_RETAIN_NONATOMIC); }

+ (void)load {

Method a = class_getInstanceMethod(self, @selector(sendAction:to:forEvent:));

Method b = class_getInstanceMethod(self, @selector(__zhw_sendAction:to:forEvent:));

method_exchangeImplementations(a, b); }

- (void)__zhw_sendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event {

if (self.zhw_ignoreEvent) return;

if (self.zhw_acceptEventInterval > 0) {

self.zhw_ignoreEvent = YES;

[self performSelector:@selector(setZhw_ignoreEvent:) withObject:@(NO) afterDelay:self.zhw_acceptEventInterval];

}

[self __zhw_sendAction:action to:target forEvent:event];

} @end

在需要用到地方导入UIControl+ZHW.h头文件设置button的点击时间间隔 @interface ViewController ()

@property (weak, nonatomic) IBOutlet UIButton *button; @property (weak, nonatomic) IBOutlet UIView *colorView; @end

@implementation ViewController

- (void)viewDidLoad { [super viewDidLoad];

self.button.zhw_ignoreEvent = NO;

self.button.zhw_acceptEventInterval = 3.0; }

- (IBAction)runtimeAction:(UIButton *)sender { NSLog(@\"----run click\");

[UIView animateWithDuration:3 animations:^{

self.colorView.center = CGPointMake(200, 500);

} completion:^(BOOL finished) {

self.colorView.center = CGPointMake(95, 85);

}]; }

- (IBAction)buttonAction:(UIButton *)sender { NSLog(@\"------comm click\");

[UIView animateWithDuration:3 animations:^{

self.colorView.center = CGPointMake(200, 500);

} completion:^(BOOL finished) {

self.colorView.center = CGPointMake(95, 85);

}]; }

运行demo,可以发现button多次点击的问题得到了解决。在设置button的相应点击事件的时间间隔，在这个 间隔时间内，button只会响应一次点击事件。