Question

我正在尝试创建一个UIView并将其设置为ViewController's视图。我确实进行了设置，但无法正确显示。例如，我为视图选择了backgroundColor，该视图没有显示。我添加了两个按钮，它们确实显示了，但没有达到预期。这是我的UIView代码：

import UIKit

public final class LoginView: UIView {
public override init(frame: CGRect) {
    super.init(frame: frame)
    self.addSubview(stackView)
    self.backgroundColor = UIColor.appColors.white

    NSLayoutConstraint.activate([
        stackView.centerXAnchor.constraint(equalTo: self.centerXAnchor),
        stackView.centerYAnchor.constraint(equalTo: self.centerYAnchor),
        stackView.leadingAnchor.constraint(equalTo: self.leadingAnchor),
        stackView.trailingAnchor.constraint(equalTo: self.trailingAnchor),
    ])
}

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

public let login: UIButton = {
    let button = UIButton(type: .system)
    button.titleLabel?.font = UIFont(name: "AvenirNext-Regular", size: 17.0)
    button.setTitle("Login", for: .normal)
    button.setTitleColor(UIColor.appColors.white, for: .normal)
    button.backgroundColor = UIColor.appColors.green
    button.contentHorizontalAlignment = .center
    button.layer.cornerRadius = 10
    button.layer.shadowColor = UIColor(white: 0, alpha: 0.25).cgColor
    button.layer.shadowOffset = CGSize(width: 0, height: 2)
    button.layer.shadowOpacity = 1
    button.layer.shadowRadius = 0
    button.layer.masksToBounds = false
    button.clipsToBounds = true

    return button
}()

public let signup: UIButton = {
    let button = UIButton(type: .system)
    button.titleLabel?.font = UIFont(name: "AvenirNext-Regular", size: 17.0)
    button.setTitle("Signup", for: .normal)
    button.setTitleColor(UIColor.appColors.white, for: .normal)
    button.backgroundColor = UIColor.appColors.red
    button.contentHorizontalAlignment = .center
    button.layer.cornerRadius = 10
    button.layer.shadowColor = UIColor(white: 0, alpha: 0.25).cgColor
    button.layer.shadowOffset = CGSize(width: 0, height: 2)
    button.layer.shadowOpacity = 1
    button.layer.shadowRadius = 0
    button.layer.masksToBounds = false
    button.clipsToBounds = true

    return button
}()

private lazy var stackView: UIStackView = {
    let stackView = UIStackView(arrangedSubviews: [self.login, self.signup])
    stackView.axis = .vertical
    stackView.distribution = .fillEqually
    stackView.alignment = .fill
    stackView.spacing = 10.0
    stackView.translatesAutoresizingMaskIntoConstraints = false

    return stackView
}()
}

这是我的ViewController：

import UIKit

class loginVC: UIViewController {
override func loadView() {
    super.loadView()
    self.view = LoginVC()
}
override func viewDidLoad() {
    super.viewDidLoad()
}


}

如您所见，我已经完成了所有设置，并且确实改变了按钮的外观并选择了backgorund颜色，但是它不会显示在ViewController上。我想将View和ViewController分开，因为我确实需要此应用程序具有灵活性，但无法使用。有什么想法吗？

Answer 1

在loadView()中，它必须是LoginView()，而不是loginVC()，即

class loginVC: UIViewController {
    override func loadView() {
        super.loadView()
        self.view = LoginView()
    }

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

编辑：

尝试仅用UIColor.appColors替换UIColor，看看是否能达到预期的效果。这是我在您的代码中所做的唯一更改，以使其能够完美运行。

视图设计未在ViewController中显示

1 个答案: