UE4部分常用源码功能抽取及实现

Unreal版本4.19.2

功能& 源码编号对照表

场景&功能	关键源码编号	定义位置&头文件名	备注
Content Browser 中选择路径获取及是否导入合法判断	1	SContentBrowser.h
点击按钮事件-打开选择文件夹	2	Engine\Source\Editor\DetailCustomizations\Private\AutoReimportDirectoryCustomization.cpp	注意不要重复包含GameplayTask.generated.h，否则编译出错

                                                                        源码编号&实现方法对照表

1

#include " SContentBrowser.h" FText SContentBrowser::GetImportTooltipText() const { const FSourcesData& SourcesData = AssetViewPtr->GetSourcesData(); if ( SourcesData.PackagePaths.Num() == 1 ) { const FString CurrentPath = SourcesData.PackagePaths[0].ToString(); if ( ContentBrowserUtils::IsClassPath( CurrentPath ) ) { return LOCTEXT( "ImportAssetToolTip_InvalidClassPath", "Cannot import assets to class paths." ); } else { return FText::Format( LOCTEXT( "ImportAssetToolTip", "Import to {0}..." ), FText::FromString( CurrentPath ) ); } } else if ( SourcesData.PackagePaths.Num() > 1 ) { return LOCTEXT( "ImportAssetToolTip_MultiplePaths", "Cannot import assets to multiple paths." ); } return LOCTEXT( "ImportAssetToolTip_NoPath", "No path is selected as an import target." ); }

2

#include "Editor/PropertyEditor/Public/PropertyHandle.h" #include "Developer/DesktopPlatform/Public/IDesktopPlatform.h" #include "Developer/DesktopPlatform/Public/DesktopPlatformModule.h" #include "Runtime/Slate/Public/Framework/Application/SlateApplication.h" //选择路径方法 FReply SWidgetDemoA::clickSelectButton() { //定义显示路径及初始化路径 FString filePath_str, InitialDir; if (InitialDir.IsEmpty()) { InitialDir = FPaths::ConvertRelativePathToFull(FPaths::ProjectContentDir()); } else if (!FPackageName::GetPackageMountPoint(InitialDir).IsNone()) { InitialDir = FPaths::ConvertRelativePathToFull(FPackageName::LongPackageNameToFilename(InitialDir)); } IDesktopPlatform* DesktopPlatform = FDesktopPlatformModule::Get(); if (DesktopPlatform) { FString FolderName; const FString Title = LOCTEXT("BrowseForFolderTitle", "Choose a directory to monitor").ToString(); const bool bFolderSelected = DesktopPlatform->OpenDirectoryDialog(FSlateApplication::Get().FindBestParentWindowHandleForDialogs(nullptr), Title, InitialDir, FolderName); if (bFolderSelected) { FolderName /= TEXT(""); filePath_str = FolderName; } } filePath->SetText(FText::FromString(filePath_str)); UE_LOG(MyLog, Warning, TEXT("选择按钮被点击，文件路径为 %s"), *filePath_str); return FReply::Handled(); }