When opening the system window under UE4 shipping, the problem of crash is attached with the plug-in download address

Original article , Reprint please indicate the source .

Plug in download link

SelectDialog Plug in download link

Preface

If you encounter normal development (Debug/Develope) It's no problem to call the interface to open the system window , and Shipping If you break down directly , Let's see if it's the same problem .

Description of collapse phenomenon ： call FDesktopPlatformModule::Get()->OpenFileDialog To open the interface under different systems , For example, you need to import the model at run time , Import pictures, videos, audio and other functions , You will use this function .
Here's the picture , I want to choose a computer in the program fbx Import the format model . stay dubug Under the normal , The bag that came out collapsed .
How to solve ？ What's the reason ？

The code you call should be similar to the following （FDesktopPlatformModuleEx It's one of my packages shipping Plug in for next use .FDesktopPlatformModuleEx::Get()）

/*  Open the system folder path   Parameters 1: File absolute path   Parameters 2: file type  TEXT("*.*")= All   Record : TEXT("FBX,JPG,BMP,PNG files|*.fbx;*.jpg;*.png;*.bmp"); TEXT("FBX Files|*.fbx"); TEXT("JPG,BMP,PNG files|*.jpg;*.png;*.bmp"); TEXT("(Image Files)|*.BMP;*.JPG;*.PNG;*.JPEG;)") */
	UFUNCTION(BlueprintCallable, Category = "OpenWindowsFile")
	static TArray<FString> OpenWindowsFiles(const FString& sTitle, const FString& sYourFullPath, const FString& sExtensionStr = TEXT("*.*"));

TArray<FString> URegionRiskReadLibrary::OpenWindowsFiles(const FString& sTitle, const FString& sYourFullPath, const FString& sExtensionStr)
{
    
	// List of files selected by the user 
	TArray<FString> OpenFileNames;

	IDesktopPlatform* DesktopPlatform = FDesktopPlatformModuleEx::Get();
	if (DesktopPlatform)
	{
    
		void* ParentWindowHandle = GEngine->GameViewport->GetWindow()->GetNativeWindow()->GetOSWindowHandle();
		DesktopPlatform->OpenFileDialog(ParentWindowHandle, sTitle, sYourFullPath, TEXT(""), *sExtensionStr, EFileDialogFlags::Multiple, OpenFileNames);
	}
	return OpenFileNames;
}

The reason for the breakdown

Actually, we are shipping The following cannot be quoted Engine in Developer Contents of any module in the folder , This can only be Debug and Develope Next use .
PS:Engine in Developer It refers to the following figure Developer All modules in the folder .
All modules in this folder cannot be in shipping Under the use of , If used , Phenomenon is shipping Downfall , The corresponding supporting documents are not in the bag at all .

You should know what happened here , In fact, it is because you call to open the system window API It belongs to DesktopPlatform modular , Happen to happen DesktopPlatform This module is again Developer Within the scope of .

Solution

Actually, it's simple , That's the top Developer In the folder DesktopPlatform Module and what it uses Related modules ( stay Developer Range ) Copy out , Modify the class name and module name .

See here , I believe you will know how to solve similar problems if you encounter them again .

So I made a plug-in , Tested for 4.25 Each version and 4.26 Each version . Other versions have not been tested .

How does the plug-in work

1> Unzip it and put it into your project Plugins In the folder ;
2> In your build.cs There will be DesktopPlatform Module reference , Replace with DesktopPlatformEx Just name the module ;
3> Get rid of DesktopPlatform The header file contains ;
4> Remember when calling FDesktopPlatformModuleEx::Get(); Put... In your code FDesktopPlatformModule Replace with FDesktopPlatformModuleEx;

/*  Open the system folder path   Parameters 1: File absolute path   Parameters 2: file type  TEXT("*.*")= All   Record : TEXT("FBX,JPG,BMP,PNG files|*.fbx;*.jpg;*.png;*.bmp"); TEXT("FBX Files|*.fbx"); TEXT("JPG,BMP,PNG files|*.jpg;*.png;*.bmp"); TEXT("(Image Files)|*.BMP;*.JPG;*.PNG;*.JPEG;)") */
	UFUNCTION(BlueprintCallable, Category = "OpenWindowsFile")
	static TArray<FString> OpenWindowsFiles(const FString& sTitle, const FString& sYourFullPath, const FString& sExtensionStr = TEXT("*.*"));

TArray<FString> URegionRiskReadLibrary::OpenWindowsFiles(const FString& sTitle, const FString& sYourFullPath, const FString& sExtensionStr)
{
    
	// List of files selected by the user 
	TArray<FString> OpenFileNames;

	IDesktopPlatform* DesktopPlatform = FDesktopPlatformModuleEx::Get();
	if (DesktopPlatform)
	{
    
		void* ParentWindowHandle = GEngine->GameViewport->GetWindow()->GetNativeWindow()->GetOSWindowHandle();
		DesktopPlatform->OpenFileDialog(ParentWindowHandle, sTitle, sYourFullPath, TEXT(""), *sExtensionStr, EFileDialogFlags::Multiple, OpenFileNames);
	}
	return OpenFileNames;
}

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