Question

我已经浏览了有关此主题的现有问题，在iOS 11之后似乎没有任何答案（这似乎打断了手势识别器）。

是否可以检测UIBarButtonItem上的短按/长按？ Apple在“页面，数字，撤消/重做的主题演讲”中使用了此功能。

Answer 1

只需将默认事件处理程序替换为tap事件

-(void)handlerForBarButton:(UIBarButtonItem*)p_Sender

及其扩展版本

-(void)handlerForBarButton:(UIBarButtonItem*)p_Sender forEvent:(UIEvent*)p_Event

通过检查UIEvent对象，您可以了解该事件是否是长按（第一个UITouch对象的tapCount为0）。

这是我的播放速率按钮的代码，如果长条按钮项被按下约一秒钟，则该速率将速率返回“ 1x”：

/*
 rateButtonPressed:forEvent:

 */
- (IBAction)rateButtonPressed:(UIBarButtonItem*)p_Sender
                     forEvent:(UIEvent*)p_Event
{
    UITouch*    firstTouch = nil;
    if (   (nil != ((firstTouch = p_Event.allTouches.allObjects.firstObject)))
        && (0 == firstTouch.tapCount))
    {
        self.avAudioPlayer.rate = 1.0;
    }
    else
    {   // Default tap
        if (2.0 == self.avAudioPlayer.rate)
        {
            self.avAudioPlayer.rate = 0.5;
        }
        else
        {
            self.avAudioPlayer.rate += 0.25;
        }
    }
    [WBSettingsSharedInstance.standardUserDefaults setDouble:self.avAudioPlayer.rate
                                                      forKey:@"audioPlayerRate"];
    [self updateRateBarButton];
}

Answer 2

尝试

@IBOutlet weak var btn: UIButton!

override func viewDidLoad() {

    let tapGesture = UITapGestureRecognizer(target: self, #selector (tap))  //Tap function will call when user tap on button
    let longGesture = UILongPressGestureRecognizer(target: self, #selector(long))  //Long function will call when user long press on button.
    tapGesture.numberOfTapsRequired = 1
    btn.addGestureRecognizer(tapGesture)
    btn.addGestureRecognizer(longGesture)
}

@objc func tap() {
     print("Single tap done")
}

@objc func long() {
     print("Long gesture recognized")
}

UIBarButtonItem长按/短按

2 个答案: