Swift进度条（UIProgressView）的用法

import UIKit

class ViewController: UIViewController        ,UITextFieldDelegate,UITextViewDelegate,UIActionSheet  Delegate,UIAlertViewDelegate{
override func viewDidLoad() {
    super.viewDidLoad()


let progressView = UIProgressView(progressViewStyle: UIProgressViewStyle.Default)
//        progressView.center = self.view.center;
    
    progressView.frame = CGRectMake(10, 590, 200, 30)
    //默认进度
    progressView.progress = 0.1
    self.view.addSubview(progressView)
   //设置进度，同时有动画效果
    progressView.setProgress(0.8, animated: true)
    progressView.progressTintColor = UIColor.blackColor()//已有进度颜色
    progressView.trackTintColor = UIColor.greenColor()//剩余进度颜色



}

}