[UE4] 常用类型数据转换FString

UE4 常用类型数据转换

1.FString参考

FString与其它类型互转官网文档参考https://docs.unrealengine.com/4.26/zh-CN/ProgrammingAndScripting/ProgrammingWithCPP/UnrealArchitecture/StringHandling/FString/

//FString官方文档：https://docs.unrealengine.com/4.26/zh-CN/ProgrammingAndScripting/ProgrammingWithCPP/UnrealArchitecture/StringHandling/FString/
//构建 FString 
FString TestHUDString = FString(TEXT("This is my test FString."));
//输出 FString 
UE_LOG(LogTemp, Log, TEXT("%s"), *TestHUDString );

FString转换

从 FString->FName,FString->FName->FText

 从FName->FString,FTex->FString

数字和其他变量到 FString

对于其他数值转换，可使用带合适参数的 FString::Printf() 函数。

// FString::Printf 格式话字符串
//输出 FString 
UE_LOG(LogTemp, Log, TEXT("%s"),  FString::Printf(TEXT("-- TestFuncThreeParams,%d, %d,%f"), bVal ? 1:0, iVal, fVal) );

从 FString 到 int 和浮点型数字变量，以及到布尔型变量之间也存在转换。

代码参考如下

	{//FString to FNameFString Str = TEXT("TestString");FName Name = FName(*Str);//FName To FStringFString TargetFString = Name.ToString();}

	{//std::string to FStringstd::string stdStr = "TestString";FString MyStr(stdStr.c_str());//FString To char*char* c = TCHAR_TO_UTF8(*MyStr);//FString to std::stringstd::string TargetString(TCHAR_TO_UTF8(*MyStr));//FString <-> TCHAR* 自动隐式转换const FString MyFString;const TCHAR *TCharString = *MyFString;const FString MyFString=TCharString;}

	{//FString to Int32FString str = TEXT("TestString");int32 i_1 = FCString::Atoi(*str);//orint32 i_2 = atoi(TCHAR_TO_UTF8(*str));//FString to floatint32 f_1 = FCString::Atof(*str);//orint32 f_2 = atof(TCHAR_TO_UTF8(*str));//FString to boolbool bNewBool = str.ToBool();//Int32 to FStringFString TStr = FString::FromInt(123);//float to FStringFString TStr_2 = FString::SanitizeFloat(123.3f);//bool to FStringint32 b = true;FString Out= b ? TEXT("true"): TEXT("false");	}

	{//FString to TCHAR*FString Str1(TEXT("TestString"));const TCHAR* MyTChar = *Str1;//FString to FTextFText MyText = FText::FromString(Str1);//FText to FNameFName Name2 = FName(*MyText.ToString());//FName to FTextFText MyText_1 = FText::FromName(Name2);}

	{//FString To TArray<uint8>FString Str = "Hello UE4"; // 原数据TArray<uint8> outDataArray; // 目标数据TCHAR* CharData = Str.GetCharArray().GetData();int32 Len = FCString::Strlen(CharData);for (int i = 0; i < Len; i++){uint8* dst = (uint8*)TCHAR_TO_UTF8(CharData);outDataArray.Add(*dst);CharData++;}// or UE4方法FBase64::Decode(Str, outDataArray);//TArray<uint8> To FStringconst std::string cstr(reinterpret_cast<const char*>(outDataArray.GetData()), outDataArray.Num());FString MyStr1(cstr.c_str());// or UE4方法FString DestStr = FBase64::Encode(outDataArray);}

	{// 枚举enum ETempEnum { One, Two, Three };{// 枚举转换字符串// 通过枚举类型的名字找到对应枚举类型的元数据指针（或者叫COD：class Object Defalut）const UEnum* EnumPtr = FindObject<UEnum>(ANY_PACKAGE,TEXT("ETempEnum"), true);if (EnumPtr){FString str = EnumPtr->GetNameStringByIndex(ETempEnum::Two);}}{// 字符串转换为枚举const UEnum* EnumPtr = FindObject<UEnum>(ANY_PACKAGE,TEXT("ETempEnum"), true);if (EnumPtr){ETempEnum OutEnum = (ETempEnum)EnumPtr->GetIndexByNameString(TEXT("One"));}}}

	{//FString To Md5FString String("sdsafasfasf");FMD5::HashAnsiString(*String);// FString To Sha1FSHA1 Sha1Gen;Sha1Gen.Update((unsigned char*)TCHAR_TO_ANSI(*String), FCString::Strlen(*String));Sha1Gen.Final();FString Sha1String;for (int32 i = 0; i < 20; i++){Sha1String += FString::Printf(TEXT("%02x"), Sha1Gen.m_digest[i]);}}

资料以及参考：

【UE4 C++ 基础知识】<3> 基本数据类型、字符串处理及转换 - 某校不良生 - 博客园

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[UE4]FString

FString官方文档https://docs.unrealengine.com/4.27/zh-CN/ProgrammingAndScripting/ProgrammingWithCPP/UnrealArchitecture/StringHandling/FString/