Swift - 丸められたUIImageViewと制約付き

Question

私はシンプルなビューコントローラを持っており、丸みを帯びたイメージビューを入れたいと思っています。 （私はストーリーボードをまったく使用しませんが、プログラムですべてをしたいです） しかし、私が何をしても、画像ビューは正方形です。

class DetailViewController: UIViewController{ 

    // MARK: - Controls 
    var imageView:UIImageView!; 
    var label:UILabel = UILabel(); 
    var button:UIButton = UIButton(); 
    var close:UIButton = UIButton(); 

    // MARK: - Fields 
    var person: Person!; 

    // MARK: - Constructors 
    init(person: Person) { 
     super.init(nibName: nil, bundle: nil); 

     self.person = person; 
     self.view.backgroundColor = UIColor.whiteColor(); 
    } 

    required init?(coder aDecoder: NSCoder) { 
     fatalError("init(coder:) has not been implemented") 
    } 

    override func viewDidLoad() { 
     super.viewDidLoad(); 

     self.imageView = UIImageView(); 
     self.imageView.image = person.picture; 
     self.imageView.translatesAutoresizingMaskIntoConstraints = false; 
     self.imageView.contentMode = .ScaleAspectFill; 
     self.view.addSubview(self.imageView); 

     self.label.translatesAutoresizingMaskIntoConstraints = false; 
     self.label.text = person.name; 
     self.label.sizeToFit(); 
     self.view.addSubview(self.label); 

     self.button.setTitle("Open Webview", forState: .Normal); 
     self.button.setTitleColor(UIColor.whiteColor(), forState: .Normal); 
     self.button.backgroundColor = UIColor.grayColor(); 
     self.button.translatesAutoresizingMaskIntoConstraints = false; 
     self.button.addTarget(self, action: #selector(DetailViewController.open), forControlEvents: .TouchUpInside); 
     self.view.addSubview(self.button); 

     self.close.setTitle("Close", forState: .Normal); 
     self.close.setTitleColor(UIColor.blueColor(), forState: .Normal); 
     self.close.backgroundColor = UIColor.clearColor(); 
     self.close.translatesAutoresizingMaskIntoConstraints = false; 
     self.close.addTarget(self, action: #selector(DetailViewController.closeView), forControlEvents: .TouchUpInside); 
     self.view.addSubview(self.close); 
     self.close.alpha = 0; 
     if(UIDevice.currentDevice().userInterfaceIdiom == .Pad) { 
      self.close.alpha = 1; 
     } 

     // Center constraint 
     self.view.addConstraint(NSLayoutConstraint(item: button, attribute: .CenterX, relatedBy: .Equal, toItem: self.view, attribute: .CenterX, multiplier: 1, constant: 0)); 
     self.view.addConstraint(NSLayoutConstraint(item: label, attribute: .CenterX, relatedBy: .Equal, toItem: self.view, attribute: .CenterX, multiplier: 1, constant: 0)); 
     self.view.addConstraint(NSLayoutConstraint(item: imageView, attribute: .CenterX, relatedBy: .Equal, toItem: self.view, attribute: .CenterX, multiplier: 1, constant: 0)); 

     // position order constraint 
     self.view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|-20-[close(40)]-60-[imageView(150)]-20-[nameLabel(40)]-35-[button(40)]", options: NSLayoutFormatOptions(rawValue:0), metrics: nil, views: ["close" : close,"imageView" : imageView, "nameLabel" : label, "button" : button])); 

     //width constaints 
     self.view.addConstraint(NSLayoutConstraint(item: button, attribute: .Width, relatedBy: .Equal, toItem: self.view, attribute: .Width, multiplier: 0.5, constant: 0)); 
     self.view.addConstraint(NSLayoutConstraint(item: imageView, attribute: .Width, relatedBy: .Equal, toItem: imageView, attribute: .Height, multiplier: 1, constant: 0)); 
     self.view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:[close(60)]-20-|", options: NSLayoutFormatOptions(rawValue:0), metrics: nil, views: ["close" : close])); 
    } 

    override func viewWillAppear(animated: Bool) { 
     super.viewWillAppear(false); 
     let dSize: CGFloat = min(imageView.frame.height, imageView.frame.width) 
     imageView.bounds = CGRectMake(0, 0, dSize, dSize) // centered in container you want to use bounds over frame for this scenario 
     imageView.layer.cornerRadius = dSize/2.0 
     imageView.layer.masksToBounds = true; 
     imageView.layer.borderWidth = 3.0 
     imageView.layer.borderColor = UIColor.redColor().CGColor 
    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 

    func open() { 

     if(UIDevice.currentDevice().userInterfaceIdiom == .Pad) { 
      self.presentViewController(WebViewController(url: self.person.url), animated: false, completion: nil); 
     } else { 
      self.presentViewController(WebViewController(url: self.person.url), animated: true, completion: nil); 
     } 
    } 

    func closeView() { 
     self.dismissViewControllerAnimated(true, completion: nil); 
    } 

} 

私は制約の代わりにフレームを使用するとうまく動作しますが、私はこれを学んでいるので制約でやりたいと思います。

誰かが私に指示をお願いできますか？

ありがとうございます！

Answer 1

は `viewWillLayoutSubviews