SwiftUI(macOS)如何将变量传递到新窗口(WindowGroup)

Question

我正试图使用新的WindowGroup在新窗口中显示更复杂的视图，但不知怎么的，我不知道如何将值传递到视图中
到目前为止，我一直在玩NSWindow，但在那里我无法将新工具栏与.toolbar{}一起使用，而且在使用最新的swiftUI功能时，我不知何故出现了奇怪的错误

在我的旧代码中，我可以像往常一样将我的值传递到新视图中：

.simultaneousGesture(TapGesture(count: 2).onEnded {
      var window: NSWindow!
      if nil == window {
           let serverView = serverView(content: content) // parse my struct content(name: "XServe-Test", configFile: "/FileUrl", permissions: .rootPermissions, cluster: cluster(x12, CPUMax: .cores(28), ramMax: .gb(1200)))
           window = NSWindow(
           contentRect: NSRect(x: 20, y: 20, width: 580, height: 400),
           styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
            backing: .buffered,
            defer: false)
            window.center()
            window.setFrameAutosaveName("ServerMainView")
            window.isReleasedWhenClosed = false
            window.title = content.name
            window.contentView = NSHostingView(rootView: serverView)
            window.toolbar = NSToolbar()
            window.toolbarStyle = .unifiedCompact
         }
      window.makeKeyAndOrderFront(nil)
 }  

现在我在应用程序文件中使用：

import SwiftUI
@main
struct myApp: App {
    
    var body: some Scene {
        WindowGroup {
            contentView()
        }.windowStyle(HiddenTitleBarWindowStyle())
        .commands {
            SidebarCommands()
            ToolbarCommands()
        }
        // the view that should be displayed in a new window 
        WindowGroup("serverView") {
            let inputContent : content = content(name: "XServe-Test", configFile: "/FileUrl", permissions: .rootPermissions, cluster: cluster(x12, CPUMax: .cores(28), ramMax: .gb(1200))) 
            serverView(content: inputContent) // this is static now :(
        }.handlesExternalEvents(matching: Set(arrayLiteral: "serverView"))
}

和以下代码打开视图：

  .simultaneousGesture(TapGesture(count: 2).onEnded {
  guard let url = URL(string: "com-code-myApp://serverView") else { return }
        NSWorkspace.shared.open(url)
}

如何使用WindowGroup逻辑将点击手势的输入传递到新视图？

Answer 1

我找到了两种方法来解决这个问题。我使用第一个，因为我的应用程序是基于文件的。第二个解决方案是基于伟大的Pulse git回购
在这两种情况下，您都需要在Xcode项目设置中注册一个自定义URL：
Tragets->您的应用程序->信息->URL类型，否则它将不起作用。

第一个解决方案：

import SwiftUI
@main
struct myApp: App {
     
    var body: some Scene {
        // 'default' view
        WindowGroup { contentView() }
 
        // the view that should open if someone opens your file
        WindowGroup("fileView") { fileView() }
        .handlesExternalEvents(matching: ["file"]) // does the magic
 
    }
}
struct fileView: View {
    var body: some View {
        VStack{ /* your view content */}
        .onOpenURL(perform: { url in
            // get url and read e.g.: your info file
        })
    }
}

// you can open a file using:
Button("openMyFileinAnExtraWindow"){
   let fileUrl = URL(fileURLWithPath: "~/Documents/myFile.yourExtension")
   NSWorkspace.shared.open(fileUrl)
}  

第二种解决方案：

注意：我创建了这个基于伟大的Pulse git repo的代码片段。

import SwiftUI
@main
struct myApp: App {
    var body: some Scene {
        // 'default' view
        WindowGroup { contentView() }
        // the view that should open if someone opens your file
        WindowGroup { DetailsView() }
        .handlesExternalEvents(matching: Set(arrayLiteral: "newWindow")) // this url must be registerd
    }
}
struct DetailsView: View {
    var body: some View {
        ExternalEvents.open
    }
}
public struct ExternalEvents {
    /// - warning: Don't use it, it's used internally.
    public static var open: AnyView?
}
struct contentView: View {
    var body: some View {
        VStack {
            // create a button that opens a new window
            Button("open a new window") {
                ExternalEvents.open = AnyView(
                    newWindow(id: 0, WindowName: "I am a new window!" )
                )
                guard let url = URL(string: "your-url://newWindow") else { return }
                NSWorkspace.shared.open(url)
            }
            
        }
    }
}
struct newWindow: View {
    var id: Int
    var WindowName: String
    var body: some View{
        VStack{
            Text(WindowName + String(id))
        }
    }
}

我不确定这是否是将变量传递到新窗口的最佳方式，但它的效果非常令人信服。我对任何解决方案的方法和想法都很满意。