BlueRoseNote/03-UnrealEngine/Gameplay/Gameplay/UE5 C++技巧.md

title, date, excerpt, tags, rating

title	date	excerpt	tags	rating
UE5 C++技巧	2022-12-09 17:02:14		c++	⭐

取得默认值

GetDefault<ULyraDeveloperSettings>()->OnPlayInEditorStarted();
GetDefault<ULyraPlatformEmulationSettings>()->OnPlayInEditorStarted();
GetMutableDefault<UContentBrowserSettings>()->SetDisplayPluginFolders(true);

模块操作

FAssetRegistryModule& AssetRegistryModule = FModuleManager::LoadModuleChecked<FAssetRegistryModule>("AssetRegistry");

if (AssetRegistryModule.Get().IsLoadingAssets())
{
	if (bInteractive)
	{
		FMessageDialog::Open(EAppMsgType::Ok, LOCTEXT("DiscoveringAssets", "Still discovering assets. Try again once it is complete."));
	}
	else
	{
		UE_LOG(LogLyraEditor, Display, TEXT("Could not run ValidateCheckedOutContent because asset discovery was still being done."));
	}
	return;
}

加载动态链接库

{
	auto dllName = TEXT("assimp-vc141-mt.dll");
#if WITH_VRM4U_ASSIMP_DEBUG
	dllName = TEXT("assimp-vc141-mtd.dll");
#endif
	{
		FString AbsPath = IPluginManager::Get().FindPlugin("VRM4U")->GetBaseDir() / TEXT("ThirdParty/assimp/bin/x64");
		//FPlatformProcess::AddDllDirectory(*AbsPath);
		assimpDllHandle = FPlatformProcess::GetDllHandle(*(AbsPath / dllName));
	}
}

UE4显示MessageBox

struct CORE_API FMessageDialog

FMessageDialog::Open(EAppMsgType::Ok, LOCTEXT("DiscoveringAssets", "Still discovering assets. Try again once it is complete."));

ref

c++ 中ref关键字的应用

ref()方法的返回值是reference_wrapper类型,这个类的源码大概的意思就是维持一个指针，并且重载操作符。

版本兼容

#if	UE_VERSION_OLDER_THAN(4,24,0)
#endif

#if	UE_VERSION_OLDER_THAN(5,0,0)
#endif