Swift - UIImageView、UIProgressView的用法

1、UIImageView

 let imageView = UIImageView(frame: CGRect(x: 10, y: 10, width: 100, height: 100))
       imageView.image = UIImage.init(named: "baibai")
        self.view.addSubview(imageView);

2、UIProgressView

 let progressView = UIProgressView(progressViewStyle: .default)

        progressView.center = self.view.center

        progressView.progress = 0.1

        progressView.setProgress(0.8, animated:true)

        progressView.progressTintColor = UIColor.green

        progressView.trackTintColor = UIColor.blue

        self.view.addSubview(progressView);

 3、