swift - 使用@IBInspectable Swift 4.2 的 UIView 上的 CornerRadius 和阴影

Question

是否可以在a 上同时拥有CornerRaduis和阴影UIView？

我为 a 设置了一个自定义类，用于UIView设置@IBInspectableacornerRadius和 aaddShadow可以是trueor false。当我设置cornerRadius阴影不显示时，如果我拿走cornerRadius它，它会再次显示。提前致谢！

自定义类：

import UIKit

class CustomUIView: UIView {

    override func awakeFromNib() {
        self.layer.masksToBounds = cornerRadius > 0
    }

    @IBInspectable var useDefaultRadius: Bool = true {
        didSet {
            self.layer.masksToBounds = cornerRadius > 0
        }
    }

    @IBInspectable var cornerRadius: CGFloat {
        set {
            self.layer.cornerRadius = newValue

        }
        get {
            if (useDefaultRadius) {
                    // Set default radius
                    self.layer.cornerRadius = 23
                }

            return self.layer.cornerRadius
        }
    }

    @IBInspectable var addShadow:Bool = true{

        didSet(newValue) {
            if(newValue == true){
                self.layer.masksToBounds = false
                self.layer.shadowColor = UIColor.black.cgColor
                self.layer.shadowOpacity = 0.5
                self.layer.shadowOffset = CGSize(width: 2, height: 3)
                self.layer.shadowRadius = 3

                self.layer.shadowPath = UIBezierPath(rect: bounds).cgPath
                self.layer.shouldRasterize = true
                self.layer.rasterizationScale =  UIScreen.main.scale
                print("trying to use shadow")
            }
        }

    }


}

标签： swiftibinspectable

Answer 1

我更喜欢扩展它，而不是每次都创建自定义类和更改 uiview 类。我通过扩展 UIView 来实现这一点，如下所述：

extension UIView {

    @IBInspectable
    var cornerRadius: CGFloat {
        get {
            return layer.cornerRadius
        }
        set {
            layer.cornerRadius = newValue
        }
    }

    @IBInspectable
    var borderWidth: CGFloat {
        get {
            return layer.borderWidth
        }
        set {
            layer.borderWidth = newValue
        }
    }

    @IBInspectable
    var borderColor: UIColor? {
        get {
            let color = UIColor.init(cgColor: layer.borderColor!)
            return color
        }
        set {
            layer.borderColor = newValue?.cgColor
        }
    }

    @IBInspectable
    var shadowRadius: CGFloat {
        get {
            return layer.shadowRadius
        }
        set {

            layer.shadowRadius = shadowRadius
        }
    }
    @IBInspectable
    var shadowOffset : CGSize{

        get{
            return layer.shadowOffset
        }set{

            layer.shadowOffset = newValue
        }
    }

    @IBInspectable
    var shadowColor : UIColor{
        get{
            return UIColor.init(cgColor: layer.shadowColor!)
        }
        set {
            layer.shadowColor = newValue.cgColor
        }
    }
    @IBInspectable
    var shadowOpacity : Float {

        get{
            return layer.shadowOpacity
        }
        set {

            layer.shadowOpacity = newValue

        }
    }        
}

并将情节提要中的属性设置为：

而已。

希望这可以帮助。