这里的角落正在工作，但影子在iOS 9和10中无效

Question

  

此处角落正在运行，但影子在iOS 9和10中无效

     

和iOS 11都运行良好

 viewBlueMe.chatCellDesign([.topLeft,.bottomLeft,.topRight], [.layerMinXMinYCorner,.layerMinXMaxYCorner,.layerMaxXMinYCorner], radius: 5)

扩展：

    extension UIView {
    func chatCellDesign(_ corners:UIRectCorner,_ cormerMask:CACornerMask, radius: CGFloat) {

        if #available(iOS 11.0, *){
            self.clipsToBounds = false
            self.layer.cornerRadius = radius
            self.layer.maskedCorners = cormerMask

            self.layer.shadowColor = UIColor.gray.cgColor
            self.layer.shadowOpacity = 1
            self.layer.shadowOffset = CGSize.zero
            self.layer.shadowRadius = 5
        }else{
            let rectShape = CAShapeLayer()
            rectShape.bounds = self.frame
            rectShape.position = self.center
            rectShape.path = UIBezierPath(roundedRect: self.bounds,    byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius)).cgPath
            self.layer.mask = rectShape

            // FIXME: THIS CODE IS NOT WORK
            self.layer.shadowColor = UIColor.gray.cgColor
            self.layer.shadowOpacity = 1
            self.layer.shadowOffset = CGSize.zero
            self.layer.shadowRadius = 5


        }
    }
}

我在iOS 9和10中需要这种类型的输出，这也是iOS11

提前致谢

Answer 1

创建一个outerview并将UILabel放入其中，请查看以下详细信息，

outerView.layer.cornerRadius = 5.0
outerView.layer.shadowColor = UIColor.black.cgColor
outerView.layer.shadowOffset = CGSize.zero
outerView.layer.shadowOpacity = 0.2
outerView.layer.shadowRadius = 5.0

<强>更新

见下图，

这是IBOutlets

@IBOutlet weak var tmpView: UIView!
@IBOutlet weak var innerView: UIView!

你可以这样做，

innerView.roundCorners([.topLeft, .topRight, .bottomLeft], radius: 5)
tmpView.layer.shadowColor = UIColor.black.cgColor
tmpView.layer.shadowOffset = CGSize.zero
tmpView.layer.shadowOpacity = 0.2
tmpView.layer.shadowRadius = 10.0

在这里找到UIView扩展，

extension UIView {
    func roundCorners(_ corners: UIRectCorner, radius: CGFloat) {
        let path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
        let mask = CAShapeLayer()
        mask.path = path.cgPath
        self.layer.mask = mask
    }
}

这将为您提供以下输出，

FYI。播放阴影属性以获得您想要的精确输出。