Missing .plist file causes the Application not showing

[felixf4xu]

Hi,

I managed to compile the project and generate UICatalog.exe, but when I double click it to run, no GUI is displayed, only a console window with this message:

error org.compnerd.swift-win32 : [SwiftWin32] InitCommonControlsEx: Win32 Error 0 - The operation completed successfully.

I tried to debug step-by-step using vscode, this is the code stopped at last:

    _ = MsgWaitForMultipleObjects(0, nil, false,
                                  DWORD(exactly: time?.timeIntervalSinceNow ?? -1)
                                      ?? INFINITE,
                                  QS_ALLINPUT | DWORD(QS_KEY) | QS_MOUSE | DWORD(QS_RAWINPUT))

I mean I can set a breakpoint at MsgWaitForMultipleObjects and the breakpoint stops, if I continue to run, it runs, but nothing happens from there.

Win11, 23H2, 22631.4317, Visual Studio 2022 installed
swift 6.0.2
main branch of this repo.

[felixf4xu]

swift 6.0.2

oh, I guess I'm still compiling using swift 5.9 mode, because I set // swift-tools-version:5.9. It will not compile if I set it to 6.0

[felixf4xu]

After I read the README again, I fount out that I need to run:

mt -nologo -manifest Examples\UICatalog\UICatalog.exe.manifest -outputresource:.build\x86_64-unknown-windows-msvc\debug\UICatalog.exe
copy Examples\UICatalog\Info.plist .build\x86_64-unknown-windows-msvc\debug\
.build\x86_64-unknown-windows-msvc\debug\UICatalog.exe

Now it worked.

[felixf4xu]

I found that the menifest tool only makes the GUI display nicer (I tested by purposely skip the mt step), it's actually the .plist file that prevent the exe to show up.

[compnerd]

Yes, the plist is required, that is not a bug but expected behaviour. There is no way to know the default type names and it needs to be provided by the developer.

[felixf4xu]

In that case, Info.plist should be Required, the document like followings might not be accurate:

| Info.plist | (Optional) The information property list file is a structured file that contains configuration information for the application. |

| Info.plist | (Recommended) The file contains confituration information for the application. |

[compnerd]

That is accurate. It is not absolutely required. If you look at the initialisation codepath, you will find that we use the application name which is a parameter, and the principal class name, which if not specified via Info.plist is defaulted. The Info.plist is required because the application name doesn't match that default for the demo application.