在日常開(kāi)發(fā)中我們有時(shí)候會(huì)遇到View只有部分圓角的需求，這是我們可以讓UI給我們切符合需求的圖引镊，那么我們能不能用代碼實(shí)現(xiàn)這一需求呢，答案是肯定的。

上代碼

給view擴(kuò)展設(shè)置部分角是原角的方法
extension UIView {

    /// 設(shè)置多個(gè)圓角
    ///
    /// - Parameters:
    ///   - cornerRadii: 圓角幅度
    ///   - roundingCorners: UIRectCorner(rawValue: (UIRectCorner.topRight.rawValue) | (UIRectCorner.bottomRight.rawValue))
     public func filletedCorner(_ cornerRadii:CGSize,_ roundingCorners:UIRectCorner)  {
          let fieldPath = UIBezierPath.init(roundedRect: bounds, byRoundingCorners: roundingCorners, cornerRadii:cornerRadii )
          let fieldLayer = CAShapeLayer()
          fieldLayer.frame =bounds
          fieldLayer.path = fieldPath.cgPath
          self.layer.mask = fieldLayer
    }
}

調(diào)用

class TextViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = UIColor.white

        let frame = CGRect(x: 0, y: 0, width: 150, height: 150)
        let tempView = UIView(frame: frame)
        tempView.backgroundColor = UIColor.o
        tempView.center  = self.view.center
        view.addSubview(tempView)
        tempView.ViewCornerRadius(CGSize(width: 5, height: 5), 
        UIRectCorner(rawValue: (UIRectCorner.topLeft.rawValue)| 
        (UIRectCorner.topRight.rawValue)))
   }
}

在iOS11之前想要用代碼實(shí)現(xiàn)部分圓角在用以上方法虑椎，但是iOS11之后就沒(méi)必要這樣麻煩

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        view.backgroundColor = UIColor.white
        let frame = CGRect(x: 0, y: 0, width: 150, height: 150)
        let tempView = UIView(frame: frame)
        tempView.backgroundColor = UIColor.orange
        tempView.center  = view.center
        view.addSubview(tempView)

        if #available(iOS 11.0, *) {
           // iOS11:只需要帶用這個(gè)系統(tǒng)方法就可以隨意設(shè)置View的圓角了，是不是很方便俱笛，趕快試一下吧
            tempView.layer.cornerRadius = 10
            tempView.layer.maskedCorners = CACornerMask(rawValue: CACornerMask.layerMinXMinYCorner.rawValue | CACornerMask.layerMaxXMinYCorner.rawValue)
        } else {
            tempView.ViewCornerRadius(CGSize(width: 5, height: 5), UIRectCorner(rawValue: (UIRectCorner.topLeft.rawValue)|(UIRectCorner.topRight.rawValue)))
        }
    }
}

運(yùn)行效果:

效果圖