Question

我正在寻找一种方法来检测用户是否按住屏幕（按住屏幕1秒）我尝试使用计时器，但我没有工作。这是我现在的代码。

var brakeTimer = NSTimer()

func update () {
    print("The user is holding the screen")   
}

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    var brakeTimer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: "update", userInfo: nil, repeats: true)
}


override func touchesCancelled(touches: Set<UITouch>?, withEvent event: UIEvent?) {
    brakeTimer.invalidate()
}

Answer 1

＆＃34;保持＆＃34;在iOS开发中通常称为界面＆＃34; Long Pressing＆＃34;。以下是如何设置其中一个：

let longPressRecognizer = UILongPressGestureRecognizer(target: self, action: "longPressed:")
        self.view.addGestureRecognizer(longPressRecognizer)

func longPressed(sender: UILongPressGestureRecognizer)
    {
        println("longpressed")
    }

与简单的点击识别器相反，当用户只是点击屏幕而不是保持更长的时间时，它会触发。

let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: "tapped:")
        self.view.addGestureRecognizer(tapGestureRecognizer)

    func tapped(sender: UITapGestureRecognizer)
    {
        println("tapped")
    }

Swift 2.0如何检测用户持有而不是仅仅点击

1 个答案: