如果項目在動畫時更改，工作表不會關閉

Question

我正在運行 XCode Beta 14.0 beta 3 盡管我認為這不是問題所在。

我有一個應用程序，它具有基於名為 Engine 的動態庫中的 AVCaptureSession 的自定義回調。 下面列出的枚舉/協議：

public enum EngineState {
    case initializing
    case running
    case ready
    case error
}

public protocol EngineStateDelegate {
    func onEngineState(state: EngineState)
}

在我的前端，當我第一次初始化 AVCaptureSession 並且代表被調用時，工作表會按應有的方式更新，但是當重新初始化它時，代表會被調用並且工作表不會關閉。 我的猜測是它不會被解雇，因為 animation 仍在發生，但我不確定。

struct MainView: View {
    @ObservedObject var viewModel = MainViewModel()
    var body: some View {
        ZStack (alignment: .topLeading) {
            // extra code here
        }
        .fullScreenCover(item: $viewModel.sheetIdentifier) { sheet in
            sheet.get()
        }
    }
}

class MainViewModel: ObservableObject {
    @Published var sheetIdentifier: MainViewSheetModel? = .init(id: .initializing)
    // --- other parts here ---
}

extension MainViewModel: EngineStateDelegate {
    func onEngineState(state: EngineState) {
        switch (state) {
        case .initializing, .ready:
            sheetIdentifier = .init(id: .initializing)
        case .running:
            self.sheetIdentifier = nil
        case .error:
            break
        }
    }
}

struct MainViewSheetModel: Identifiable {
    enum Sheets {
        case audioInterrupted
        case videoInterrupted
        case ipadInterrupted
        case pressureInterrupted
        case mediaServicesReset
        case runtimeError
        case streamStatus
        case initializing
        case other
    }
    
    var id: Sheets
    var message1: String
    var message2: String
    var progressSpinner: Bool
    
    //: DEFAULTS
    private struct internalSheetModel {
        var message1: String
        var message2: String
        var progressSpinner: Bool
    }
    
    private let SheetModelData: [Sheets: internalSheetModel] = [
        .audioInterrupted: internalSheetModel(
            message1: "Your camera/mic are unavailable. Waiting for them to become usable.",
            message2: "If you are playing music in the background, pause it to resume.",
            progressSpinner: true),
        .videoInterrupted: internalSheetModel(
            message1: "Restarting Video System ... ",
            message2: "",
            progressSpinner: true),
        .ipadInterrupted: internalSheetModel(
            message1: "The Camera is not usable in Split View.",
            message2: "Please open the app by itself.",
            progressSpinner: false),
        .pressureInterrupted: internalSheetModel(
            message1: "The device is too hot to use the camera/mic.",
            message2: "Please try again later.",
            progressSpinner: false),
        .mediaServicesReset: internalSheetModel(
            message1: "Media Services Reset",
            message2: "Restarting Camera Engine",
            progressSpinner: true),
        .runtimeError: internalSheetModel(
            message1: "The camera/mic system crashed.",
            message2: "Please contact support if the problem persists.",
            progressSpinner: false),
        .streamStatus: internalSheetModel(
            message1: "Stream Status",
            message2: "",
            progressSpinner: true),
        .initializing: internalSheetModel(
            message1: "Initializing the Camera Engine",
            message2: "",
            progressSpinner: true),
        .other: internalSheetModel(
            message1: "",
            message2: "",
            progressSpinner: true)
    ]
    
    //: BODY
    init() {
        self.id = .other
        self.message1 = ""
        self.message2 = ""
        self.progressSpinner = false
    }
    
    init(id: Sheets) {
        self.id = id
        self.message1 = SheetModelData[id]?.message1 ?? ""
        self.message2 = SheetModelData[id]?.message2 ?? ""
        self.progressSpinner = SheetModelData[id]?.progressSpinner ?? false
    }
    
    init(id: Sheets = .other, message1: String, message2: String, progressSpinner: Bool) {
        self.id = id
        self.message1 = message1
        self.message2 = message2
        self.progressSpinner = progressSpinner
    }
    
    //: Internal View
    struct InternalSheetView: View {
        var message1: String
        var message2: String
        var progressSpinner: Bool
        
        var body: some View {
            ZStack {
                Color.black.opacity(0.0)
                    .edgesIgnoringSafeArea(.all)
                
                VStack(spacing: 24) {
                    if (progressSpinner) {
                        ProgressView()
                            .progressViewStyle(.circular)
                            .scaleEffect(2)
                            .padding()
                    }
                    
                    if (!message1.isEmpty) {
                        Text(message1)
                    }
                    
                    if (!message2.isEmpty) {
                        Text(message2)
                    }
                } //: VStack
            } //: ZStack
            .edgesIgnoringSafeArea(.all)
            .background(
                BackgroundBlurView()
                    .edgesIgnoringSafeArea(.all)
            )
        }
    }
    
    func get() -> some View {
        return InternalSheetView(message1: message1, message2: message2, progressSpinner: progressSpinner)
    }
}

我的問題：如何確保視圖在沒有用戶交互的情況下消失？

提前感謝您的幫助。

Answer 1

我發現問題實際上是我的相機在應用程序失去焦點時試圖打開一張紙，並且由於一張紙已經打開，所以它出錯了。