Unreal Engine 4 问题：如何设置分辨率

1.在Editor中设置分辨率

此种方式只适用于在Editor中运行的情况。方法如下：
File -> Editor Preference -> play -> Play in New Window中设置

2.对导出后的exe文件设置分辨率

在如下目录下添加GameUserSettings.ini文件：
$EXPORT_FOLDER%\WindowsNoEditor\$GAME_NAME$\Saved\Config\WindowsNoEditor

GameUserSettings.ini文件内容如下：

[/Script/Engine.GameUserSettings]
bUseVSync=False
ResolutionSizeX=1280
ResolutionSizeY=1024
LastUserConfirmedResolutionSizeX=1280
LastUserConfirmedResolutionSizeY=1024
WindowPosX=-1
WindowPosY=-1
bUseDesktopResolutionForFullscreen=False
FullscreenMode=2
LastConfirmedFullscreenMode=2
Version=5

其中
bUseDesktopResolutionForFullscreen：表示是否要全屏时使用桌面的分辨率

FullscreenMode：
0-真全屏
1-假全屏，全屏无边框
2-非全屏

导出时，exe文件也会在project\Saved\StagedBuilds\WindowsNoEditor中生成，也可以在这个目录下的$GAME_NAME$\Saved\Config\WindowsNoEditor中放入GameUserSettings.ini

3.从C++代码中设置分辨率

void AMyGameMode::BeginPlay()
{
 
 if(GEngine)
 {
     UGameUserSettings* MyGameSettings = GEngine->GetGameUserSettings();
     MyGameSettings->SetScreenResolution(FIntPoint(1024,768));
     MyGameSettings->SetFullscreenMode(EWindowMode::Fullscreen);
     MyGameSettings->SetVSyncEnabled(true);
     MyGameSettings->ApplySettings();
 }
}

参考文档：

https://answers.unrealengine.com/questions/51623/how-to-fullscreen-packaged-build.html