如何在Swift 3.0中拖放精灵?
发布时间:2020-12-14 05:28:10 所属栏目:百科 来源:网络整理
导读:我所要做的就是能够在屏幕上拖放一个精灵.我试过以下代码: override func touchesBegan(touches: SetUITouch,withEvent event: UIEvent?) {}override func touchesMoved(touches: SetUITouch,withEvent event: UIEvent?) { for touch in (touches ) { let l
我所要做的就是能够在屏幕上拖放一个精灵.我试过以下代码:
override func touchesBegan(touches: Set<UITouch>,withEvent event: UIEvent?) { } override func touchesMoved(touches: Set<UITouch>,withEvent event: UIEvent?) { for touch in (touches ) { let location = touch.locationInNode(self) if ball.containsPoint(location) { ball.position = location } } } 这段代码确实有效,但是当我快速拖动球时,我猜它会检测到“球”不再包含点“位置”并且球停止,这意味着我再次接球.我希望球能够快速响应我的触球,这样球就不会停止移动.我该怎么办?
我有一个实现,我已经将UIImageView子类化并称之为“DraggableImage”
override func touchesBegan(_ touches: Set<UITouch>,with event: UIEvent?) { originalPosition = self.center } override func touchesMoved(_ touches: Set<UITouch>,with event: UIEvent?) { if let touch = touches.first { let position = touch.location(in: self.superview) self.center = CGPoint(x: position.x,y: position.y) } } override func touchesEnded(_ touches: Set<UITouch>,with event: UIEvent?) { self.center = originalPosition } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |