UE编辑器内模拟移动平台操控

在PC上：

  GetMutableDefault<UInputSettings>()->bUseMouseForTouch = false; //是否用鼠标模拟touch

//设置当Viewport被点击的时候，鼠标被捕获的方式
 GetMutableDefault<UInputSettings>()->DefaultViewportMouseCaptureMode = EMouseCaptureMode::CapturePermanently_IncludingInitialMouseDown;

在移动平台上：

 APlayerController* PC = Cast<APlayerController>(GetOuter()); 
if (IsValid(PC)) 
{  
 GetMutableDefault<UInputSettings>()->bUseMouseForTouch = true; 
 GetMutableDefault<UInputSettings>()->DefaultViewportMouseCaptureMode = EMouseCaptureMode::NoCapture; 
 PC->bShowMouseCursor = true; //显示鼠标
 PC->DefaultMouseCursor = EMouseCursor::Crosshairs;//显示默认的鼠标样式

}

绑定Touch回调事件:

每个actor都有一个InputComponent。

        InputComponent->BindTouch(EInputEvent::IE_Pressed, this, &xxx::TouchPressed); 
        InputComponent->BindTouch(EInputEvent::IE_Released, this, &XXX::TouchReleased); 
        InputComponent->BindTouch(EInputEvent::IE_Repeat, this, &XXX::TouchRepeat);