【UE4 C++】 启动 / 关闭外部exe、开启虚拟键盘

启动/关闭外部exe

• 引擎自带

  • FPlatformProcess::CreateProc()
  • FPlatformProcess::TerminateProc()

• windows api

• ShellExecute()

• system()

  virtual void Tick(float DeltaTime) override;
  
  FProcHandle pHandle ;
  
  UFUNCTION(BlueprintCallable)
   void OpenExternalApp(const FString& AppPath);
  
  UFUNCTION(BlueprintCallable)
   void CloseExternalApp();
  
  UFUNCTION(BlueprintCallable)
   void ExecuteExternalApp(const FString& AppPath);
  
  UFUNCTION(BlueprintCallable)
   void KillProcess(const FString& ProcessName);
  
  

  #include <string>
  #include <windows.h>
  
  void ASystemActor::OpenExternalApp(const FString& AppPath)
  {
  	pHandle= FPlatformProcess::CreateProc(*AppPath, nullptr, true, false, false, nullptr, 0, nullptr, nullptr);
  	UE_LOG(LogTemp,Warning,TEXT(__FUNCTION__"Create App"))
  }
  
  void ASystemActor::CloseExternalApp()
  {
  	if (pHandle.IsValid())
  	{
  		FPlatformProcess::TerminateProc(pHandle);
  		pHandle.Reset();
  		UE_LOG(LogTemp,Warning,TEXT(__FUNCTION__"Close App"))
  	}
  	else
  	{
  		UE_LOG(LogTemp,Warning,TEXT(__FUNCTION__"Close None"))
  	}
  }
  
  void ASystemActor::ExecuteExternalApp(const FString& AppPath)
  {
  	std::string str_path=TCHAR_TO_UTF8(*AppPath);
  	std::wstring wstr_path;
  	wstr_path.assign(str_path.begin(), str_path.end());
  	ShellExecute(NULL, L"open", wstr_path.c_str(), NULL, NULL, SW_SHOWDEFAULT);
  }
  
  void ASystemActor::KillProcess(const FString& ProcessName)
  {
  	std::string process = std::string("TASKKILL /F /IM ") + TCHAR_TO_UTF8(*ProcessName);
  	system(process.c_str());
  	UE_LOG(LogTemp,Warning,TEXT(__FUNCTION__"Kill App Process"))
  }
  
  

  

---

开启虚拟键盘 On-Screen Keyboard

• ShellExecute

  void ASystemActor::ShowVirtualKeyboard()
  {
  	ShellExecute(NULL, L"open", L"osk.exe", NULL, NULL, SW_SHOWNORMAL);
  	//WinExec("TabTip.exe", SW_SHOWNORMAL);
  }