在uiimageview中有边框的彩色区域

let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 200, height: 200))
imageView.image = UIImage(named: "your_image_name")

imageView.layer.borderWidth = 2.0
imageView.layer.borderColor = UIColor.red.cgColor

imageView.layer.cornerRadius = 10.0
imageView.layer.masksToBounds = true

view.addSubview(imageView)