我有2个视图(viewLeft
,viewRight
)。我通过计算相同的锚点,使用天使0(初始设置)旋转这些视图,以使视图看起来像跨铰链旋转。
我已经完成了下面的代码,如果我在情节提要(viewcontroller)中获取视图,则工作正常,如果我将相同的视图和代码复制并粘贴到笔尖中,则无法正常工作。在《鸟巢》中,天使视角为0时,它们之间留有一些空间。这是奇怪的行为,我检查了所有代码输出和约束,一切都很好,但无法弄清为什么它不起作用。
我希望它可以在NIB中工作。
任何帮助都是有意义的。
Github 虚拟项目参考here
从情节提要
来自XIB
设置锚点
extension UIView {
func setAnchorPoint(_ point: CGPoint) {
var newPoint = CGPoint(x: bounds.size.width * point.x, y: bounds.size.height * point.y)
var oldPoint = CGPoint(x: bounds.size.width * layer.anchorPoint.x, y: bounds.size.height * layer.anchorPoint.y);
newPoint = newPoint.applying(transform)
oldPoint = oldPoint.applying(transform)
var position = layer.position
position.x -= oldPoint.x
position.x += newPoint.x
position.y -= oldPoint.y
position.y += newPoint.y
layer.position = position
layer.anchorPoint = point
}
}
旋转功能
func rotateView(_ addAngel : CGFloat) {
let rotateToAngel = angel + addAngel
guard rotateToAngel <= 0.6 && rotateToAngel >= -0.6 else {
return
}
angel = rotateToAngel
let anchorPointLeft = CGPoint(x: (viewLeft.frame.width - viewLeft.frame.height/2)/viewLeft.frame.width,
y: ( viewLeft.frame.height/2)/viewLeft.frame.height)
viewLeft.setAnchorPoint(anchorPointLeft)
let anchorPointRight = CGPoint(x: (viewRight.frame.height/2/viewRight.frame.width),
y: ( viewRight.frame.height/2)/viewRight.frame.height)
viewRight.setAnchorPoint(anchorPointRight)
self.viewLeft.transform = CGAffineTransform.init(rotationAngle: rotateToAngel)
self.viewRight.transform = CGAffineTransform.init(rotationAngle: -rotateToAngel)
}