UE4类型转换大全

FString To Int

int32 NewInt = FCString::Atoi(*TheString);

FString To Float

float NewFloat = FCString::Atoi(*TheString);

FString To int

int MyInt = FCString::Atoi(*MyFString);

FString To bool

bool bNewbool = TestString.ToBool();

FString To char*

TCHAR_TO_UTF8(*content)

FString To Tchar

MyTchar = *MyFString;

FString To uint8

TArray AMyActor::UintConvert()
{
    
    
	FString szMsg = "gest";
	TArray tr_int8;
	TCHAR* pSendData = szMsg.GetCharArray().GetData();
	int32 nDataLen = FCString::Strlen(pSendData);
	for (int i=0;i<nDataLen;i++)
	{
    
    
	uint8 dst = (uint8)TCHAR_TO_UTF8(pSendData);//
	tr_int8.Add(*dst);
	pSendData++;
	}
	return tr_int8;
}

FString To FName

FName NewName = FName(*TheString);

FString To FText

FText NewText = FText::FromString(TheString);

FString To std::string

std::string MyStdString(TCHAR_TO_UTF8(*TheString));

FString To MD5（FString）

FMD5::HashAnsiString(TEXT(“someStuff”));

FString To streamIO

FString InValue; //FString有/0要+1   只支持英文
InValue.GetCharArray().GetData()
//Write(InValue.GetCharArray().GetData(), InValue.Len() + 1);
    
*this << InValue.GetCharArray();
return *this;

streamIO To FString

*this >> InValue.GetCharArray();
return *this;

Int To FString

FString NewString = FString::FromInt(MyNewInt);

Float To FString

FString NewString = FString::SanitizeFloat(MyNewFloat);

FText To FString

FString NewString = TestText.ToString();

FName To FString

FString NewString = TestName.ToString();

uint8 To FString

FString AMyActor::UintConvert2()
{
    
    
	const TArray& BinaryArray = {
    
    103, 116};
	//(Create a string from a byte array!）
	const std::string cstr(reinterpret_cast<const char*>(BinaryArray.GetData()), BinaryArray.Num());
	//(FString can take in the c_str() of a std::string)
	return FString(cstr.c_str());
}
//FString::Printf(TEXT("%s"), UTF8_TO_TCHAR(reinterpret_cast<const char*>(Request.Body.GetData())));

std:string To FString

FString NewString(TestString.c_str());
//（示例std::string TestString = "TestString";）

double To FString

FString::Printf(Text(“%0.14f”),xxx);

char To FString

UTF8_TO_TCHAR(char)

TCHAR To FString

TCHAR* dd =TEXT("aa");
FString cc = dd;

TCHAR To std:string

for (TArray<const TCHAR*>& ite : content)
{
    
    
const std::string cstr(reinterpret_cast<const char*>(ite.GetData()),ite.Num());
}

FName To FText

NewText = FText::FromName(TestName);

Enum To FString

template
FString XXXHandle::GetEnumValueAsString(const FString& Name, TEnum Value)
{
    
    
const UEnum EnumPtr = FindObject(ANY_PACKAGE, Name, true);
if (!EnumPtr) {
    
    
return FString("InValid");
}
return EnumPtr->GetNameStringByIndex((int32)Value);
}
ESecondCategory SecCategory;
FString CategoryName = GetEnumValueAsString(FString("ESecondCategory"), SecCategory);
FString UKismetNodeHelperLibrary::GetEnumeratorUserFriendlyName(const UEnum* Enum, uint8 EnumeratorValue)
{
    
    
    if (nullptr != Enum)
    {
    
    
   			return Enum->GetDisplayNameTextByValue(EnumeratorValue).ToString();
    }
		return FName().ToString();
}
EMyEnum::Type MyVariable;
static const UEnum* Enum = StaticEnum<EMyEnum::Type>();
Enum->GetNameStringByValue(MyVariable);

Enum To int32

int32 ChunkStatus = static_castEnumAA;

FString To Enum

template
TEnum xxxHandle::GetEnumValueFromString(const FString& Name, FString Value)
{
    
    
	const UEnum EnumPtr = FindObject(ANY_PACKAGE, Name, true);
	if (!EnumPtr) {
    
    
	return TEnum(0);
	}
	return (TEnum)EnumPtr->GetIndexByName(FName(*FString(Value)));
}
FString CategoryName;
ESecondCategory SecCategory = GetEnumValueFromString(FString("ESecondCategory"), *CategoryName);

FString to FText的NSLOCTEXT

FText Message = FText::Format(
	NSLOCTEXT("UnrealClient", "{0}", "{1}"),
	FText::FromString(tips),
	FText::FromString(TEXT("aa"))
);

std:string To char*

char* name = _strdup(othername.c_str());
(char*)clearText.c_str()

std:string To const char*

const char* name = othername.c_str();

char* To FString

char+=FString;

ANSICHAR To TCHAR

ANSICHAR IndexA = I+65;
TCHAR ANSIChar = FString(&IndexA).GetCharArray()[0];
return FString(&ANSIChar);

char To FString

FString.AppendChar(char);
//or (FString)UTF8_TO_TCHAR(char);

UnixTime To DateTime

int64 UMyBlueprintFunctionLibrary::NowUnix()
{
    
    
return FDateTime::UtcNow().ToUnixTimestamp();
}

DateTime To UnixTime

FDateTime DateTime = FDateTime::FromUnixTimestamp(UnixTime);

int64 To FString

FString::Printf(TEXT(“%lld”),time);//time int64

JsonObject To Fstring

TSharedRef<TJsonWriter<>> Writer = TJsonWriterFactory<>::Create(&JsonStr);
FJsonSerializer::Serialize(JsonObject.ToSharedRef(), Writer);

FString To JsonObject

TSharedPtr JsonObject = MakeShareable(new FJsonObject);
TSharedRef< TJsonReader<> > Reader = TJsonReaderFactory<>::Create(JsonStr);
FJsonSerializer::Deserialize(Reader, JsonObject );

编辑器显示中文

TCHAR_TO_UTF8();
UTF8_TO_TCHAR();
FString chinese =  FString::Printf(TEXT("%s"),*str);
NewColumn.StringValue = FString::Printf(TEXT("%s"), UTF8_TO_TCHAR(sqlChars));
FString::Printf(TEXT("%s"), UTF8_TO_TCHAR(reinterpret_cast<const char*>(Request.Body.GetData())));

FString to Base64

TArray<uint8> outArray;
FBase64::Decode(baseString, outArray);

std::string to const unsigned char*

const unsigned char *ptr = (const unsigned char *)cstr.c_str();

CString to string

void CString2char(CString cstr,char CharString[])
{
    
    
	LPCWCHAR origString = cstr;
	size_t origsize = wcslen(origString) + 1;
	size_t convertedChars = 0;
	wcstombs_s(&convertedChars, CharString, origsize, origString, _TRUNCATE);
}

char to uint8

char Data[1024] = "Hello,I'm client";
(uint8*)Data ;//隐式转换

Hex to Byte

uint8 UXXXHelper::HexToByte(FString Hex)
{
    
       
    uint8 OutDec;
    
    Hex.StartsWith("#") ? Hex = Hex.Mid(1,Hex.Len()-1) : Hex;
        
    HexToBytes(Hex.ToUpper(), &OutDec);
    return OutDec;
}

Byte to Hex

static FORCEINLINE FString ByteToHex(uint8 Byte) { return FString::Printf(TEXT(“%02X”), Byte); }

Hex to Color

static FORCEINLINE FColor HexToColor(FString Hex) { return FColor::FromHex(Hex); }

Hex to LinearColor

static FORCEINLINE FLinearColor HexToLinearColor(FString Hex) { return FLinearColor(FColor::FromHex(Hex)); }

LinearColor to Hex

 static FORCEINLINE FString LinearColorToHex(const FLinearColor Color, const bool IsSRGB) {
    
     return Color.ToFColor(IsSRGB).ToHex(); }

uint8 to FColor

void FxxxCommonUtils::Uint8ToFColor(const TArray<uint8>& OrginArray, TArray<FColor>& OutArray)
{
    
    
	for (int32 i = 0;i < OrginArray.Num();i += 4)
	{
    
    
		FColor c;
		c.R = OrginArray[i + 0];
		c.G = OrginArray[i + 1];
		c.B = OrginArray[i + 2];
		c.A = OrginArray[i + 3];
		OutArray.Add(c);
	}
}

Texure to int8

uint8* MipData = static_cast<uint8*>(SrcTex->PlatformData->Mips[0].BulkData.Lock(LOCK_READ_WRITE));

	int32 w = SrcTex->GetSurfaceWidth();
	int32 h = SrcTex->GetSurfaceHeight();

	uint8* SrcPtr = nullptr;
	for (int32 y = 0;y < h;++y)
	{
    
    
		SrcPtr = &MipData[y * w * sizeof(FColor)];
		for (int32 x = 0;x < w;++x)
		{
    
    
			uint8 R = *SrcPtr++;
			uint8 G = *SrcPtr++;
			uint8 B = *SrcPtr++;
			uint8 A = *SrcPtr++;
			Outs.Add(B);
			Outs.Add(G);
			Outs.Add(R);
			Outs.Add(A);
		}

	}

	SrcTex->PlatformData->Mips[0].BulkData.Unlock();

Unicode to UTF8

FString UMyBlueprintFunctionLibrary::UnicodeToUTF8(const FString content)
{
    
    
	std::string str(TCHAR_TO_UTF8(*content));
	std::string u8str;
	std::wstring_convert<std::codecvt_utf8<char32_t>, char32_t> converter;
	for (size_t i = 0; i < str.length(); ) {
    
    
		char32_t uhan = strtol(str.substr(i,4).c_str(), nullptr, 16);
		u8str += converter.to_bytes(uhan);

		i += 4;
	}

	return UTF8_TO_TCHAR(u8str.c_str());
	
}

UTF8 to Unicode

FString UMyBlueprintFunctionLibrary::UTF8ToUnicode(const FString content)
{
    
    
	std::string str(TCHAR_TO_UTF8(*content));
	std::string unicodeStr;
	size_t length = strlen(str.c_str())+1;
	//int32 length = content.Len();
    
	// char * setlocale ( int category, const char * locale );
	// 本函数用来配置地域的信息，设置当前程序使用的本地化信息.参数 locale 若是空字符串 ""，则会使用系统环境变量的 locale
	// 说明string中的字符编码是本机默认字符集，即GB字符集
	setlocale(LC_ALL,"");
    
	//wchar_t wstr[length] ;
	wchar_t *wstr = new wchar_t[length];
	mbstowcs(wstr, str.c_str(), length);
	char charUnicode[5];

	for (size_t i = 0; i < wcslen(wstr); i++) {
    
    
		memset(charUnicode, '\0', 5);
		sprintf(charUnicode, "%04x", wstr[i]);
		unicodeStr.append(charUnicode);
	}

	return unicodeStr.c_str();
}