添加漸變圖層（swift 2.3）

Question

如何設置漸變從左到右？

let uiview : UIView = UIView.init(frame: CGRect(x: 50, y: 100, width: 100, height: 10)) 
let gradient = CAGradientLayer() 
gradient.frame = uiview.bounds 
gradient.colors = [UIColor.whiteColor().CGColor, UIColor.lightGrayColor().CGColor] 
gradient.startPoint = CGPoint(x: 0, y: 0.5) 
gradient.endPoint = CGPoint(x: 1, y: 0.5) 
uiview.layer.insertSublayer(gradient, atIndex: 0) 
self.view.addSubview(uiview) 

Answer 1

看看CAGradientLayer - Core Animation | Apple Developer Documentation

試着這麼做：

let radians: CGFloat = CGFloat.pi 
let x: CGFloat = 0.0 
let y: CGFloat = 0.0 
let z: CGFloat = 1.0 

gradient.transform = CATransform3DMakeRotation(radians, x, y, z) 

當然，你可以玩的值，直到你得到你想要的精確結果。