Added cmd argument: -checkinst=<0/1|true/false> it's useful for testing multiplayer game on a single pc

Author: mrbindraw

Source/CheckAppInstance/Private/CheckAppInstanceBPLibrary.cpp

@@ -12,6 +12,12 @@ UCheckAppInstanceBPLibrary::UCheckAppInstanceBPLibrary(const FObjectInitializer&
 void UCheckAppInstanceBPLibrary::CheckAnotherAppInstance(bool bIsEnabled)
 {
 #if !UE_EDITOR
+	FString ParseValue;
+	if (FParse::Value(FCommandLine::Get(), TEXT("-checkinst="), ParseValue))
+	{
+		bIsEnabled = ParseValue.ToBool();
+	}
+	
 	FCoreDelegates::OnAllModuleLoadingPhasesComplete.AddLambda([bIsEnabled]() 
 	{	
 		// Only one instance of the game can be initialized!

Source/CheckAppInstance/Public/CheckAppInstanceBPLibrary.h

@@ -7,6 +7,7 @@
 #include "HAL/PlatformApplicationMisc.h"
 #include "GeneralProjectSettings.h"
 #include "Misc/CoreDelegates.h"
+#include "Misc/CommandLine.h"
 #include "CheckAppInstanceBPLibrary.generated.h"
 
 UCLASS()