Swift 给视图添加边框，给图像视图添加圆角效果,给图像视图添加阴影效果

// MARK:给视图添加边框，给图像视图添加圆角效果,给图像视图添加阴影效果

    private func addLayer(){

        

        let img = UIImage(named: "image")

        let imgView = UIImageView(frame: CGRect(x: 24, y: 88, width: 300, height: 300))

        

        imgView.image = img

        imgView.layer.borderWidth = 10

        imgView.layer.borderColor = UIColor.lightGray.cgColor

//        imgView.layer.cornerRadius = 150

//        imgView.layer.masksToBounds = true

        

        imgView.layer.shadowColor = UIColor.black.cgColor

        imgView.layer.shadowOffset = CGSize(width: 10.0, height: 10.0)

        imgView.layer.shadowOpacity = 0.45

        imgView.layer.shadowRadius = 10

        

       self.view.addSubview(imgView)

 

    }

    

    // MARK:UIView视图渐变填充

    private func viewGradientFilling(){

        

        let rect = CGRect(x: 30, y: 60, width: 200, height: 200)

        let gradientView = UIView(frame: rect)//初始化一个视图对象，作为渐变图形的容器

        

        let gradientLayer = CAGradientLayer()//新建一个渐变层

        gradientLayer.frame = gradientView.frame//设置渐变层的位置和尺寸，与视图对象保持一致

        

        let fromColor = UIColor.yellow.cgColor //设置渐变色的起始颜色为黄色

        let midColor = UIColor.red.cgColor //设置渐变色的中间颜色为红色

        let toColor = UIColor.purple.cgColor//设置渐变的颜色为紫色

        

        gradientLayer.colors = [fromColor,midColor,toColor];//将颜色的数组赋值给颜色渐变层的颜色数组属性

        gradientView.layer.addSublayer(gradientLayer)//将配置好的渐变层添加到视图对象的层中

        

        self.view.addSubview(gradientView)

        

    }

    

    // MARK:UiView视图的纹理填充

    private func textureFillingOfViews(){

//        将导入的图片作为纹理，平铺整个屏幕

        let image = UIImage(named: "image")

        let patternColor = UIColor.init(patternImage: image!)

        self.view.backgroundColor = patternColor

    }