NSString과 C 문자열간 변환하기

Foundation에서 제공하는 NSString 문자열을 C 문자열로 변환하기 위해서는 -cStringUsingEncoding: 메시지를 사용하면 된다. 반대로 C 문자열을 NSString로 변환하여 쓰기 위해서는 +stringWithCString:encoding:을 사용한다.

메시지 원형

- (const char *) cStringUsingEncoding : (NSStringEncoding) encoding

+ (id)stringWithCString:(const char *)cString encoding:(NSStringEncoding)enc

• encoding

  const char * 형 버퍼가 갖는 데이터의 인코딩 종류를 지정한다. (아래 참조)

사용 예

#import <Foundation/Foundation.h>
#import <stdio.h>
#import <stdlib.h>
#import <string.h>

int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

	char szBuffer1[512];
	char szBuffer2[512];
	NSString * nsString = nil;
	const char * cString = NULL;
	
	printf("write any string : ");
	scanf("%s", szBuffer1);
	fflush(stdin);
	
	nsString = [NSString stringWithCString: szBuffer1 encoding: NSASCIIStringEncoding];
	cString = [nsString cStringUsingEncoding: NSASCIIStringEncoding];
	strcpy(szBuffer2, cString);
	
	printf("szBuffer1: %s\n", szBuffer1);
	NSLog(@"nsString: %@\n", nsString);
	printf("szBuffer2: %s\n", szBuffer2);
	
	printf("END");
	
    [pool drain];
    return 0;
}

더 보기

인코딩 목록 (출처: http://blog.marines.co.kr/archives/946)

상수 값	상수명	설명	인코딩명
1	NSASCIIStringEncoding	Western (ASCII)	US-ASCII
2	NSNEXTSTEPStringEncoding	Western (NextStep)	X-NEXTSTEP
3	NSJapaneseEUCStringEncoding	Japanese (EUC)	EUC-JP
4	NSUTF8StringEncoding	Unicode (UTF-8)	UTF-8
5	NSISOLatin1StringEncoding	Western (ISO Latin 1)	ISO-8859-1
6	NSSymbolStringEncoding	Symbol (Mac OS)	X-MAC-SYMBOL
7	NSNonLossyASCIIStringEncoding	Non-lossy ASCII
8	NSShiftJISStringEncoding	Japanese (Windows, DOS)	CP932
9	NSISOLatin2StringEncoding	Central European (ISO Latin 2)	ISO-8859-2
10	NSUnicodeStringEncoding	Unicode (UTF-16)	UTF-16
11	NSWindowsCP1251StringEncoding	Cyrillic (Windows)	WINDOWS-1251
12	NSWindowsCP1252StringEncoding	Western (Windows Latin 1)	WINDOWS-1252
13	NSWindowsCP1253StringEncoding	Greek (Windows)	WINDOWS-1253
14	NSWindowsCP1254StringEncoding	Turkish (Windows Latin 5)	WINDOWS-1254
15	NSWindowsCP1250StringEncoding	Central European (Windows Latin 2)	WINDOWS-1250
21	NSISO2022JPStringEncoding	Japanese (ISO 2022-JP)	ISO-2022-JP
30	NSMacOSRomanStringEncoding	Western (Mac OS Roman)	MACINTOSH
-1677721344		Unicode (UTF-32LE)	UTF-32LE
-1744830208		Unicode (UTF-32BE)	UTF-32BE
-1811939072		Unicode (UTF-16LE)	UTF-16LE
-1879047936		Unicode (UTF-16BE)	UTF-16BE
-1946156800		Unicode (UTF-32)	UTF-32
-2147480574		Western (EBCDIC Latin 1)	IBM037
-2147481079		Traditional Chinese (Big 5-E)
-2147481080		Ukrainian (KOI8-U)	KOI8-U
-2147481082		Traditional Chinese (Big 5 HKSCS)	Big5-HKSCS
-2147481083		Simplified Chinese (HZ GB 2312)	HZ-GB-2312
-2147481084		Western (Mac Mail)	X-MAC-ROMAN-LATIN1
-2147481085		Traditional Chinese (Big 5)	BIG5
-2147481086		Cyrillic (KOI8-R)	KOI8-R
-2147481087		Japanese (Shift JIS)	SHIFT_JIS
-2147481280		Korean (EUC)	EUC-KR
-2147481295		Traditional Chinese (EUC)	EUC-TW
-2147481296		Simplified Chinese (EUC)	EUC-CN
-2147481536		Korean (ISO 2022-KR)	ISO-2022-KR
-2147482062		Chinese (GB 18030)	GB18030
-2147482063		Chinese (GBK)	GBK
-2147482072		Japanese (Shift JIS X0213)	Shift_JIS
-2147482360		Vietnamese (Windows)	WINDOWS-1258
-2147482361		Baltic Rim (Windows)	WINDOWS-1257
-2147482362		Arabic (Windows)	WINDOWS-1256
-2147482363		Hebrew (Windows)	WINDOWS-1255
-2147482589		Traditional Chinese (Windows	DOS), CP950
-2147482590		Korean (Windows	DOS), CP949
-2147482591		Simplified Chinese (Windows	DOS), CP936
-2147482595		Thai (Windows	DOS), CP874
-2147482596		Greek (DOS Greek 2)	IBM869
-2147482597		Cyrillic (DOS)	CP866
-2147482598		Nordic (DOS)
-2147482599		Arabic (DOS)	cp864
-2147482600		Canadian French (DOS)
-2147482601		Hebrew (DOS)	DOS-862
-2147482602		Icelandic (DOS)	CP861
-2147482603		Portuguese (DOS)
-2147482604		Turkish (DOS)	CP857
-2147482605		Cyrillic (DOS)
-2147482606		Central European (DOS Latin 2)	CP852
-2147482607		Greek (DOS Greek 1)
-2147482608		Western (DOS Latin 1)	CP850
-2147482618		Baltic Rim (DOS)	CP775
-2147482619		Greek (DOS)	CP737
-2147482624		Latin-US (DOS)	CP437
-2147483120		Romanian (ISO Latin 10)	ISO-8859-16
-2147483121		Western (ISO Latin 9)	ISO-8859-15
-2147483122		Celtic (ISO Latin 8)	ISO-8859-14
-2147483123		Baltic Rim (ISO Latin 7)	ISO-8859-13
-2147483125		Thai (ISO 8859-11)	ISO-8859-11
-2147483126		Nordic (ISO Latin 6)	ISO-8859-10
-2147483127		Turkish (ISO Latin 5)	ISO-8859-9
-2147483128		Hebrew (ISO 8859-8)	ISO-8859-8
-2147483129		Greek (ISO 8859-7)	ISO-8859-7
-2147483130		Arabic (ISO 8859-6)	ISO-8859-6
-2147483131		Cyrillic (ISO 8859-5)	ISO-8859-5
-2147483132		Central European (ISO Latin 4)	ISO-8859-4
-2147483133		Western (ISO Latin 3)	ISO-8859-3
-2147483412		Inuit (Mac OS)
-2147483496		Cyrillic (Mac OS Ukrainian)	X-MAC-UKRAINIAN
-2147483508		Farsi (Mac OS)	X-MAC-FARSI
-2147483607		Keyboard Symbols (Mac OS)
-2147483608		Gaelic (Mac OS)
-2147483609		Celtic (Mac OS)
-2147483610		Romanian (Mac OS)	X-MAC-ROMANIAN
-2147483611		Icelandic (Mac OS)	X-MAC-ICELANDIC
-2147483612		Croatian (Mac OS)	X-MAC-CROATIAN
-2147483613		Turkish (Mac OS)	X-MAC-TURKISH
-2147483614		Dingbats (Mac OS)	X-MAC-DINGBATS
-2147483619		Central European (Mac OS)	X-MAC-CENTRALEURROMAN
-2147483622		Tibetan (Mac OS)	X-MAC-TIBETAN
-2147483623		Simplified Chinese (Mac OS)	X-MAC-SIMP-CHINESE
-2147483627		Thai (Mac OS)	X-MAC-THAI
-2147483637		Gujarati (Mac OS)	X-MAC-GUJARATI
-2147483638		Gurmukhi (Mac OS)	X-MAC-GURMUKHI
-2147483639		Devanagari (Mac OS)	X-MAC-DEVANAGARI
-2147483641		Cyrillic (Mac OS)	X-MAC-CYRILLIC
-2147483642		Greek (Mac OS)	X-MAC-GREEK
-2147483643		Hebrew (Mac OS)	X-MAC-HEBREW
-2147483644		Arabic (Mac OS)	X-MAC-ARABIC
-2147483645		Korean (Mac OS)	X-MAC-KOREAN
-2147483646		Traditional Chinese (Mac OS)	X-MAC-TRAD-CHINESE
-2147483647		Japanese (Mac OS)	X-MAC-JAPANESE