如何在 Swift 3 中画圆

Question

Swift 3 如何做一个圆？圆圈应位于中心。是一定的半径。背景-blackblur。谢谢

Answer 1

为了让一个圆画一个正方形并添加一个等于宽度/2 的角半径：

let circle = UIView(frame: CGRect(x: 0.0, y: 0.0, width: 100.0, height: 100.0))

circle.center = self.view.center
circle.layer.cornerRadius = 50
circle.backgroundColor = UIColor.black
circle.clipsToBounds = true


var darkBlur = UIBlurEffect(style: UIBlurEffectStyle.dark)
var blurView = UIVisualEffectView(effect: darkBlur)

blurView.frame = circle.bounds

circle.addSubview(blurView)
self.view.addSubview(circle)

祝你好运！ :)

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