[英]iOS Pinch Zoom Start from Previous Scale
I want to do a pinch/zoom having the zoom start at the current scale. 我想进行捏/缩放,以当前比例开始缩放。 I have tried the following code:
我尝试了以下代码:
@objc func pinchedView(recognizer:UIPinchGestureRecognizer) {
if (recognizer.state == .ended) {
lastScale = 1.0
return
}
let scale = 1.0 - (lastScale - recognizer.scale)
let zoomInAction = SKAction.scale(to: cameraNode.yScale + scale, duration: 0.25)
lastScale = recognizer.scale
cameraNode.run(zoomInAction)
}
The problem is that it keeps getting smaller and smaller no matter which way I pinch. 问题是,无论我捏哪种方式,它都会变得越来越小。 How can I correct this?
我该如何纠正?
I think you might instead want to initialize lastScale to 1.0 when your gesture begins. 我认为您可能想在手势开始时将lastScale初始化为1.0。
Look at the accepted answer to this question. 查看此问题的公认答案 。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.