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请知道我是Swift和IOS的新手。我正在使用平移手势来移动标签。完成后,我想自动添加新标签。我试图在pan函数的末尾调用函数,但添加新标签时,我移动的标签会从屏幕上移开。我试图使用“panGR.state.rawValue == 3”,“panGR.state == UIGestureRecognizerState.ended”和一个计时器 - 没有成功。请帮忙。如何在平移手势后立即调用某个函数?
但愿这是需要解释的问题代码:
func initGestureRecognizers() {
let panGR = UIPanGestureRecognizer(target: self, action:
#selector(ShapeView.didPan(_:)))
addGestureRecognizer(panGR)
}
func didPan(_ panGR: UIPanGestureRecognizer) {
self.superview!.bringSubview(toFront: self)
var size: CGFloat = 53
var translation = panGR.translation(in: self)
translation = translation.applying(self.transform)
self.center.x += translation.x
self.center.y += translation.y
panGR.setTranslation(CGPoint.zero, in: self)
if panGR.state.rawValue == 1 { // save the last position
let startX = self.center.x
let startY = self.center.y
}
if panGR.state.rawValue == 3 { // when move is finished
// this will remove ability to move tile
removeGestureRecognizer(panGR)
// the following code should replace the moved tile,
// with a new tile, but leave the moved tile where it is.
// BUT - it moves the moved tile to coordinates (x=0,y=0), if
// the following 2 lines are executed.
self.center.x = 0
self.center.y = 0
// if the above 2 lines are not executed, the new tile
// does not get displayed
replaceMovedTile()
}
}
func replaceMovedTile() {
// position new tile
let tapPoint = CGPoint(x: 46 + 22, y: 596 + 22)
let shapeView = ShapeView(origin: tapPoint)
addSubview(shapeView)
}
我们需要更多的代码,您的选择器的平移手势代码。 –
显示你的代码,然后我可以帮你 –
欢迎来到堆栈溢出!请参阅[问]和[mcve]。 – Mat