UIViewRepresentable 保持白色

UIViewRepresentable remains white

我有这个非常基本的设置:

struct ConversationChatMessagesWrapper: UIViewRepresentable {
    private let view = ConversationChatViewWithSendMessage()

    func makeUIView(context _: Context) -> ConversationChatViewWithSendMessage {
        view
    }

    func updateUIView(
        _: ConversationChatViewWithSendMessage,
        context _: Context
    ) {}
}


class ConversationChatViewWithSendMessage: UIView {
    @available(*, unavailable)
    required init?(coder _: NSCoder) {
        fatalError("Not used")
    }

    init() {
        super.init(frame: .zero)

        translatesAutoresizingMaskIntoConstraints = false

        backgroundColor = .red

        let otherView = UIView()

        otherView.backgroundColor = .blue
        otherView.translatesAutoresizingMaskIntoConstraints = false

        addSubview(otherView)

        otherView.topAnchor.constraint(equalTo: topAnchor).isActive = true
        otherView.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
        otherView.trailingAnchor.constraint(equalTo: trailingAnchor).isActive = true
        otherView.leadingAnchor.constraint(equalTo: leadingAnchor).isActive = true
    }
}

我有一段时间没有使用 UIKit,但我认为它应该看到蓝屏,或者至少是红屏,但我的屏幕仍然是白色的。当我删除将 otherView 添加到 ConversationChatViewWithSendMessage 的调用时,我看到蓝屏,所以在添加 otherView 时出现问题,但我看不到什么。我什至在情节提要中复制了这个设置,而且效果很好。

有什么建议吗?

这是来自 Xcode 的屏幕截图,警告指出:

Position and size are ambigious

删除super.init后的这一行。

translatesAutoresizingMaskIntoConstraints = false