ios - 键盘扩展中的preferredScreenEdgesDeferringSystemGestures不起作用

Question

我试图在SwiftUI上进行键盘扩展。我的键盘经常使用手势。但是，位于屏幕底部附近的按键向上的手势将被识别为系统手势。就像说here一样，我尝试使用preferredScreenEdgesDeferringSystemGestures的UIInputViewController参数，但这无济于事。

这是我的代码:

导入UIKit
导入SwiftUI
//导入CoreData

struct SwiftUIContainer: View{
    @State var dragLocation: CGPoint = .zero
    var body: some View{
        VStack{
            Circle()
                .fill(Color.red)
                .frame(width: 20, height: 20)
                .position(self.dragLocation)
                .gesture(DragGesture().onChanged(){value in
                    self.dragLocation = value.location
                }
            )
        }.background(Color.green)
    }
}

class MyController<Content: View>: UIHostingController<Content>{
    open override var preferredScreenEdgesDeferringSystemGestures: UIRectEdge{
        print("request edges for conteiner")
        return [.bottom]
    }
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        print("set edges for conteiner")
        setNeedsUpdateOfScreenEdgesDeferringSystemGestures() // better to call it here
    }
}

class KeyboardViewController: UIInputViewController {
    @IBOutlet var nextKeyboardButton: UIButton!
    var swiftUIConteiner: UIViewController!
    override var preferredScreenEdgesDeferringSystemGestures: UIRectEdge{
        print("request edges for keyboard")
        return [.bottom]
    }
    override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
        super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
        let swiftUIView = SwiftUIContainer()
        let child = MyController(rootView: swiftUIView)
        child.view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        self.swiftUIConteiner = child as UIViewController
        //  child.setNeedsUpdateOfScreenEdgesDeferringSystemGestures()
        print("create children for keyboard")

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

    override func viewDidLoad(){
        super.viewDidLoad()
        view.addSubview(self.swiftUIConteiner.view)
        addChild(self.swiftUIConteiner)
        print("insert children for keyboard")
    }

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        print("set edges for keyboard")
        setNeedsUpdateOfScreenEdgesDeferringSystemGestures() // better to call it here
    }

    override var childForScreenEdgesDeferringSystemGestures: UIViewController? {
        print("show children for keyboard")
        return self.swiftUIConteiner
    }
}

我都尝试过，将UIHostingController覆盖为子类，并覆盖UIInputViewController。没什么帮助。键盘是否可以禁用系统底部屏幕边缘手势？

现在，它是如何工作的:



这是在全屏应用程序中的工作方式，我希望键盘也能做到这一点:

Answer 1

尝试更新。查看内联评论。

class KeyboardViewController: UIInputViewController {
    @IBOutlet var nextKeyboardButton: UIButton!
    let device = Device()
    override var preferredScreenEdgesDeferringSystemGestures: UIRectEdge{
        return [.bottom]
    }
    override func updateViewConstraints() {
        super.updateViewConstraints()
    }
    override func viewDidLoad() {
        super.viewDidLoad()
        let setting = KeyboardSettings.Default
        let swiftUIView = SwiftUIContainer(inputObjectDelegate: self, setting: setting)

        let child = MyController(rootView: swiftUIView.environmentObject(device))
        child.view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        view.addSubview(child.view)
        addChild(child)

        let heightConstraint = NSLayoutConstraint(item: view, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: CGFloat(setting.height))
        view.addConstraint(heightConstraint)
    }

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)

        setNeedsUpdateOfScreenEdgesDeferringSystemGestures() // better to call it here
    }

    // required if child controller used
    override var childForScreenEdgesDeferringSystemGestures: UIViewController? {
        return self.children.first // should be MyController, or provide explicitly
    }
}