When you want to test a simple expression like print("Hello, World!") on the top level, it needs to be written in a fixed file main.swift, no other file names are allowed. And main.swift would only work with the project template: macOS Command Line Tool. Create a new project macOS Command Line Tool, and edit main.swift. Or if you want to test your code in a GUI app, you need to move the line print("Hello, World!") into some function.

If the transfer works then my sendData() method up top would print a statement but my addToFav only prints "favourite button pressed". Then I guess delegate is nil when sendData() is called. By the way, please follow the simple coding rule of Swift -- type names should start with Capital letter. Your code is hard to read.

There is a new non-blocking error : DocumentManager] Failed to associate thumbnails for picked URL  ... Some articles on the web say, that you can safely ignore it. If you find something non-ignorable with this message, you should better start a new thread.

I solved the problem, thank you. Thanks for reporting. Please mark the right answer as the solution if there is. Or else, please post an answer by yourself and mark it as the solution.

I probably need to assign a color name with swift code 5. The color in the little square next to the appicon is already there. You can edit the asset names by long-clicking on the names, no need to write code in Swift.

What am I missing? Maybe it is caused by some implementation details of the current SwiftUI in the similar way where .sheet cannot handle @State vars. A simple workaround: import SwiftUI @main struct MenuTestApp: App { 		@State var active = false 		var body: some Scene { 				WindowGroup { 						ContentView() 				} 				.commands(content: { 						CommandMenu("Tools", content: { 								Button("Normally active", action: {active = !active}).disabled(active) 								Button("Normally inactive", action: {active = !active}).disabled(!active) 						}) 						CommandGroup(after: .newItem, addition: { 								MyCommandGroup(active: $active) 						}) 				}) 		} } struct MyCommandGroup: View { 		@Binding var active: Bool 		var body: some View { 				Button("Normally active", action: {active.toggle()}).disabled(active) 				Button("Normally inactive", action: {active.toggle()}).disabled(!active) 		} }

Sorry, bug your description and code are too vague and I do not understand what you really want to do? when users press a button in another view called Play In your code, there is no button in the view Play. I have created a view called Graph  Your Play has a view named ViewGraph inside, is it the same as the view called Graph? a graph is displayed What triggers the graph to be displayed? Can you show the whole code of Graph (or ViewGraph) ?

Maybe it needs to type the right command in the terminal ?  No, never.

I can't save the color there next to the appicon in the small color square with the white color, while I set the color(any) to the large Universal squares. Sorry, but as far as I tried, I cannot get the screen you have described. What version of Xcode are you using? Are you sure you have chosen Color Set after pressing the + button at the left bottom? Can you share the screen shot of your Assets editor by any means? (It's a pity this site does not have an image sharing feature yet.)

As far as I tried, UIDocumentPickerViewController shows the file saved in the Documents directory. (For plist files, "com.apple.property-list" seems to be the right type specifier.) Have you set Info.plist of your app properly? You need to set both UIFileSharingEnabled and LSSupportsOpeningDocumentsInPlace to YES.

if you know what is the caused that lead me to wrap those methods with DispatchQueue.main.async{} as stated above please let me know hehe Thanks for sharing your experience. But unfortunately, whether enclosing with DispatchQueue.main.async{...} or not does not affect the behavior of my test project, so I have nothing to tell you right now. Please share your info when you find something new, I will be watching on this thread.

the "new" menu item is grayed out after the close is performed Can you explain what sort of app you have created?

Yes it is, I guess this yes is for Editing Assets.xcassets?. How is the color asset shown in the Assets editor?

Preferably based on text on a website Can you prepare a website which you can control?

I was setting custom colors and got an warning: Color set has an unassigned color child. How are you setting custom colors? Editing Assets.xcassets? Can't you assign colors to all the children?