Ios 约束不'；我不能正常工作

我目前正在处理一个项目，并以编程方式创建了一个自定义视图

以下是我在自定义类中编写的代码：

class CodeView: UIView {

let codeTextView = UITextView()
let nameLabel = UILabel()
let dateLabel = UILabel()
let mainStackView = UIStackView()
let labelStackView = UIStackView()
let buttonStackView = UIStackView()
let lowerStackView = UIStackView()
let copyButton = UIButton()
let shareButton = UIButton()

let size = CGRect(x: 0, y: 0, width: 250, height: 175)

public init(name: String?, date: String?, code: String) {

    if let name = name {
        nameLabel.text = name
    } else {
        nameLabel.isHidden = true
    }

    if let date = date {
        dateLabel.text = date
    } else {
        dateLabel.isHidden = true
    }

    codeTextView.text = code

    super.init(frame: CGRect(x: 0, y: 0, width: 250, height: 175))

    subview()
    setup()
    addingConstraints()

}

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
}

func setup() {

    self.layer.cornerRadius = 15
    self.backgroundColor = .white

    codeTextView.textColor = .white
    codeTextView.backgroundColor = UIColor(red: 2/255, green: 11/255, blue: 57/255, alpha: 0.75)
    codeTextView.layer.cornerRadius = 15
    codeTextView.font = UIFont(name: "Avenir-Medium", size: 15)

    nameLabel.font = UIFont(name: "Avenir-Medium", size: 17)

    dateLabel.font = UIFont(name: "Avenir-Light", size: 17)

    copyButton.setImage(UIImage(named: "Copy"), for: .normal)
    copyButton.setImage(UIImage(named: "Copy Highlighted"), for: .highlighted)
    copyButton.setImage(UIImage(named: "Copy Highlighted"), for: .selected)
    copyButton.addTarget(self, action: #selector(copyText), for: .touchUpInside)
    copyButton.setTitle("", for: .normal)
    copyButton.imageView?.contentMode = .scaleAspectFit

    shareButton.setImage(UIImage(named: "Share"), for: .normal)
    shareButton.setImage(UIImage(named: "Share Highlighted"), for: .highlighted)
    shareButton.setImage(UIImage(named: "Share Highlighted"), for: .selected)
    shareButton.addTarget(self, action: #selector(shareText), for: .touchUpInside)
    shareButton.setTitle("", for: .normal)
    shareButton.imageView?.contentMode = .scaleAspectFit


    mainStackView.axis = .vertical
    mainStackView.spacing = 10

    lowerStackView.axis = .horizontal
    lowerStackView.alignment = .center
    lowerStackView.distribution = .fillProportionally

    labelStackView.axis = .vertical

    buttonStackView.axis = .horizontal
    buttonStackView.alignment = .fill
    buttonStackView.distribution = .fillEqually
    buttonStackView.spacing = 10

}

func addingConstraints() {

    //TranslatesAutoresizingMaskIntoConstraints = false
    self.translatesAutoresizingMaskIntoConstraints = false
    codeTextView.translatesAutoresizingMaskIntoConstraints = false
    mainStackView.translatesAutoresizingMaskIntoConstraints = false
    labelStackView.translatesAutoresizingMaskIntoConstraints = false
    buttonStackView.translatesAutoresizingMaskIntoConstraints = false
    nameLabel.translatesAutoresizingMaskIntoConstraints = false
    dateLabel.translatesAutoresizingMaskIntoConstraints = false
    copyButton.translatesAutoresizingMaskIntoConstraints = false
    shareButton.translatesAutoresizingMaskIntoConstraints = false

    var constraint = [NSLayoutConstraint]()

    let ViewWidth = NSLayoutConstraint(item: self, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .width, multiplier: 1, constant: 250)
    let ViewHeight = NSLayoutConstraint(item: self, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .height, multiplier: 1, constant: 175)

    let MainStackViewCenterX = NSLayoutConstraint(item: mainStackView, attribute: .centerX, relatedBy: .equal, toItem: self, attribute: .centerX, multiplier: 1, constant: 0)
    let MainStackViewCenterY = NSLayoutConstraint(item: mainStackView, attribute: .centerY, relatedBy: .equal, toItem: self, attribute: .centerY, multiplier: 1, constant: 0)
    let MainStackViewTop = NSLayoutConstraint(item: mainStackView, attribute: .top, relatedBy: .equal, toItem: self, attribute: .topMargin, multiplier: 1, constant: 5)
    let MainStackViewLeft = NSLayoutConstraint(item: mainStackView, attribute: .leading, relatedBy: .equal, toItem: self, attribute: .leadingMargin, multiplier: 1, constant: 5)
    let MainStackViewRight = NSLayoutConstraint(item: mainStackView, attribute: .trailing, relatedBy: .equal, toItem: self, attribute: .trailingMargin, multiplier: 1, constant: 5)

    let CodeTextViewTop = NSLayoutConstraint(item: codeTextView, attribute: .top, relatedBy: .equal, toItem: mainStackView, attribute: .topMargin, multiplier: 1, constant: 0)
    let CodeTextViewLeft = NSLayoutConstraint(item: codeTextView, attribute: .leading, relatedBy: .equal, toItem: mainStackView, attribute: .leadingMargin, multiplier: 1, constant: 0)
    let CodeTextViewRight = NSLayoutConstraint(item: codeTextView, attribute: .trailing, relatedBy: .equal, toItem: mainStackView, attribute: .trailingMargin, multiplier: 1, constant: 0)

    let LowerStackViewBottom = NSLayoutConstraint(item: lowerStackView, attribute: .bottom, relatedBy: .equal, toItem: mainStackView, attribute: .bottomMargin, multiplier: 1, constant: 0)
    let LowerStackViewLeft = NSLayoutConstraint(item: lowerStackView, attribute: .leading, relatedBy: .equal, toItem: mainStackView, attribute: .leadingMargin, multiplier: 1, constant: 0)
    let LowerStackViewRight = NSLayoutConstraint(item: lowerStackView, attribute: .trailing, relatedBy: .equal, toItem: mainStackView, attribute: .trailingMargin, multiplier: 1, constant: 0)

    let LabelStackViewCenterY = NSLayoutConstraint(item: labelStackView, attribute: .centerY, relatedBy: .equal, toItem: lowerStackView, attribute: .centerY, multiplier: 1, constant: 0)
    let LabelStackViewLeft = NSLayoutConstraint(item: labelStackView, attribute: .leading, relatedBy: .equal, toItem: lowerStackView, attribute: .leadingMargin, multiplier: 1, constant: 0)

    let ButtonStackViewCenterY = NSLayoutConstraint(item: buttonStackView, attribute: .centerY, relatedBy: .equal, toItem: lowerStackView, attribute: .centerY, multiplier: 1, constant: 0)
    let ButtonStackViewRight = NSLayoutConstraint(item: buttonStackView, attribute: .trailing, relatedBy: .equal, toItem: lowerStackView, attribute: .trailingMargin, multiplier: 1, constant: 0)

    let CopyButtonWidth = NSLayoutConstraint(item: copyButton, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .width, multiplier: 1, constant: 28)
    let CopyButtonHeight = NSLayoutConstraint(item: copyButton, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .height, multiplier: 1, constant: 35)

    constraint.append(contentsOf: [ViewHeight, ViewWidth, MainStackViewCenterX, MainStackViewCenterY, MainStackViewTop, MainStackViewLeft, MainStackViewRight, CodeTextViewTop, CodeTextViewLeft, CodeTextViewRight, LowerStackViewBottom, LowerStackViewLeft, LowerStackViewRight, LabelStackViewCenterY, LabelStackViewLeft, ButtonStackViewCenterY, ButtonStackViewRight, CopyButtonWidth, CopyButtonHeight])

    NSLayoutConstraint.activate(constraint)

}

func subview() {

    self.addSubview(codeTextView)
    self.addSubview(nameLabel)
    self.addSubview(dateLabel)
    self.addSubview(copyButton)
    self.addSubview(shareButton)
    self.addSubview(mainStackView)
    self.addSubview(lowerStackView)
    self.addSubview(labelStackView)
    self.addSubview(buttonStackView)

    mainStackView.addArrangedSubview(codeTextView)
    mainStackView.addArrangedSubview(lowerStackView)

    lowerStackView.addArrangedSubview(labelStackView)
    lowerStackView.addArrangedSubview(buttonStackView)

    labelStackView.addArrangedSubview(nameLabel)
    labelStackView.addArrangedSubview(dateLabel)

    buttonStackView.addArrangedSubview(copyButton)
    buttonStackView.addArrangedSubview(shareButton)

}



func copyText() {
    UIPasteboard.general.string = codeTextView.text
}

func shareText() {
    let alert = UIAlertController(title: "Share?", message: "You probably don't want to share your code to everyone out there", preferredStyle: .alert)
    alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
    alert.addAction(UIAlertAction(title: "Share", style: .default, handler: { (action) in
        let activity = UIActivityViewController(activityItems: [self.codeTextView.text], applicationActivities: nil)
        UIApplication.shared.keyWindow?.rootViewController?.present(activity, animated: true, completion: nil)
    }))
    UIApplication.shared.keyWindow?.rootViewController?.present(alert, animated: true, completion: nil)
}
}

下面是我想将视图添加到应用程序时编写的代码：

@IBOutlet weak var contentView: UIView!
let codeView1 = CodeView(name: "Hello", date: "Today", code: "Bla bla bla")
let stackView = UIStackView()
var viewArray = [CodeView]()

override func viewDidLoad() {
    super.viewDidLoad()

    viewArray.append(codeView1)

    for i in viewArray {
        stackView.addArrangedSubview(i)
    }

    contentView.addSubview(stackView)

    stackView.translatesAutoresizingMaskIntoConstraints = false

    stackView.axis = .horizontal
    stackView.alignment = .center
    stackView.spacing = 20

    let centerX = NSLayoutConstraint(item: stackView, attribute: .centerX, relatedBy: .equal, toItem: contentView, attribute: .centerX, multiplier: 1, constant: 0)
    let centerY = NSLayoutConstraint(item: stackView, attribute: .centerY, relatedBy: .equal, toItem: contentView, attribute: .centerY, multiplier: 1, constant: 0)

    NSLayoutConstraint.activate([centerX, centerY])

}

但运行应用程序后，它看起来像

即使我想让它看起来像

我在代码中添加了与在故事板中使用的完全相同的约束

---

非常感谢您，我非常感谢您在以编程方式编写约束时提供的各种帮助。通常，最好使用iOS 9约束锚。下面是我在通过编程开发的聊天应用程序中用于用户手机的约束锚代码片段

    //ios 9 constraint anchors
    //need x,y,width,height anchors
    profileImageView.leftAnchor.constraint(equalTo: self.leftAnchor, constant: 8).isActive = true
    profileImageView.centerYAnchor.constraint(equalTo: self.centerYAnchor).isActive = true
    profileImageView.widthAnchor.constraint(equalToConstant: 48).isActive = true
    profileImageView.heightAnchor.constraint(equalToConstant: 48).isActive = true

    //need x,y,width,height anchors
    timeLabel.rightAnchor.constraint(equalTo: self.rightAnchor).isActive = true
    timeLabel.topAnchor.constraint(equalTo: self.topAnchor, constant: 18).isActive = true
    timeLabel.widthAnchor.constraint(equalToConstant: 100).isActive = true
    timeLabel.heightAnchor.constraint(equalTo: textLabel!.heightAnchor).isActive = true
}

---

显然，约束的详细信息与本例不同，但这应该为您提供一个模板来试验，以解决您的问题。

因此，我的理解是，您希望视图具有锐角，而不是圆角。是这样吗？