以编程方式设置约束，以使视图全屏显示

Question

我在UIView上添加了loadingComponent，UINavigationController，并且我试图将约束设置为全屏。问题是topAnchor的loadingComponent从navigationBar的底部开始。

static func usingAutoLayout() -> Self {

    let anyUIView = self.init()
    anyUIView.translatesAutoresizingMaskIntoConstraints = false

    return anyUIView
}

private let loadingComponent: LoadingComponent = {

    let loadingComponent = LoadingComponent.usingAutoLayout()
    loadingComponent.render(with: .configure(.init(backgroundColor: ColorName.white.color,
                                                   styleText: StyledText(text: L10n.Submit.Upload.inProgress,
                                                                         style: StyleSheet.Label.boldDark19),
                                                   alpha: 1.0)))

    return loadingComponent
}()

private func defineSubviewsConstraints() {

    self.stackView.pinToBounds(of: self)

    NSLayoutConstraint.activate([

        self.loadingComponent.topAnchor.constraint(equalTo: self.topAnchor),
        self.loadingComponent.bottomAnchor.constraint(equalTo: self.bottomAnchor),
        self.loadingComponent.leadingAnchor.constraint(equalTo: self.leadingAnchor),
        self.loadingComponent.trailingAnchor.constraint(equalTo: self.trailingAnchor)
    ])
}

Answer 1

在向视图添加约束之前，您需要将translatesAutoresizingMaskIntoConstraints属性设置为false。

loadingComponent.translatesAutoresizingMaskIntoConstraints = false