65 lines
1.7 KiB
Markdown
65 lines
1.7 KiB
Markdown
---
|
|
title: UE5 C++技巧
|
|
date: 2022-12-09 17:02:14
|
|
excerpt:
|
|
tags: c++
|
|
rating: ⭐
|
|
---
|
|
## 取得默认值
|
|
```c++
|
|
GetDefault<ULyraDeveloperSettings>()->OnPlayInEditorStarted();
|
|
GetDefault<ULyraPlatformEmulationSettings>()->OnPlayInEditorStarted();
|
|
GetMutableDefault<UContentBrowserSettings>()->SetDisplayPluginFolders(true);
|
|
```
|
|
## 模块操作
|
|
```c++
|
|
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
|
|
``` |