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我只想在检测到长按后实现平移手势。我正在监视“UIGestureRecognizerState.Changed”的长按手势,并调用我的选择器来处理那里的平移。选择器触发(我的“print()”检查显示在控制台中),但我必须在 uiview (blueRec) 实际移动/翻译之前抬起手指。

我知道长按和平移手势本质上都是连续的,但是我如何使用触发长按的初始按下来平移触摸的 uiview (blueRec)?我不相信这完全是-requireGestureRecognizerToFail的情况:

我已经剥离了下面的代码,只包含基本行。

@IBOutlet weak var graySuper: UIView!
@IBOutlet weak var blueRec: UIView!

@IBOutlet weak var blueLeading: NSLayoutConstraint!
@IBOutlet weak var blueTop: NSLayoutConstraint!

var longPressGesture:UILongPressGestureRecognizer!


override func viewDidLoad() {

    super.viewDidLoad()

    self.longPressGesture = UILongPressGestureRecognizer(target:self, action:"handleLongpress:")
    self.longPressGesture.minimumPressDuration = 2
    self.blueRec.addGestureRecognizer(self.longPressGesture)


}


func handleLongpress(sender:UILongPressGestureRecognizer) {

    print("LPress")

   switch (sender.state) {
    case UIGestureRecognizerState.Began:

        self.blueRec.center = sender.locationInView(self.graySuper)


        break;
    case UIGestureRecognizerState.Changed:

        self.blueRec.center = sender.locationInView(self.graySuper)



        break;
    case UIGestureRecognizerState.Ended:

        print("Press Ended ")

        break;
    default:
        break;
    } 

}

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1 回答 1

1

我正在回答我自己的问题,因为这是一个非常基本的解决方案,目前我还没有遇到。希望这至少可以帮助某人。

长按手势足以跟踪可拖动对象的移动,不需要单独的平移手势,因为它出现在我的原始代码中。

    @IBOutlet weak var graySuper: UIView!
@IBOutlet weak var blueRec: UIView!

@IBOutlet weak var blueLeading: NSLayoutConstraint!
@IBOutlet weak var blueTop: NSLayoutConstraint!

var longPressGesture:UILongPressGestureRecognizer!


override func viewDidLoad() {

    super.viewDidLoad()

    self.longPressGesture = UILongPressGestureRecognizer(target:self, action:"handleLongpress:")
    self.longPressGesture.minimumPressDuration = 2
    self.blueRec.addGestureRecognizer(self.longPressGesture)


}


func handleLongpress(sender:UILongPressGestureRecognizer) {

    print("LPress")

   switch (sender.state) {
    case UIGestureRecognizerState.Began:

        self.blueRec.center = sender.locationInView(self.graySuper)


        break;
    case UIGestureRecognizerState.Changed:

        self.blueRec.center = sender.locationInView(self.graySuper)



        break;
    case UIGestureRecognizerState.Ended:

        print("Press Ended ")

        break;
    default:
        break;
    } 
于 2015-09-27T03:22:17.263 回答