Question

我有一个带有UIView功能的expand。当我调用此函数时，UIView保持居中，并且扩大了它的宽度。

问题是我的UIView有一个shadow和一个shadowPath。每当我扩展它时，阴影都会立即扩展到视图在动画结束时获得的最大宽度，而不是遵循边界。

func expand() {
    guard self.expanded == false else {
        return
    }

    let originX = self.frame.origin.x
    let originY = self.frame.origin.y
    let originWidth = self.frame.width
    let originHeight = self.frame.height
    let newWidth = self.frame.width * 2

    let newRect = CGRect(x: originX - ((newWidth - originWidth) / 2), y: originY, width: newWidth, height: originHeight)

    self.expanded = true

    UIView.animate(withDuration: 0.4, animations: {
        self.frame = newRect
        self.layoutIfNeeded()
    }) { (completed) in
    }
}


override func layoutSubviews() {
    super.layoutSubviews()
    self.layer.shadowPath = UIBezierPath(roundedRect: self.bounds, cornerRadius: self.layer.cornerRadius).cgPath
}

Answer 1

UIView显式（但私下）选择隐式设置其图层属性中的哪一个，而shadowPath不是其中之一。您必须自己制作动画。

UIView动画shadowPath不跟随

1 个答案: