IOS中的编码格式—char*汉字转为NSString*

char* 转为NSString*

NSStringEncodingenc=CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);

char*c_test = "先先先"；

int nLen = strlen(c_test);

NSString* str = [[NSString alloc]initWithBytes:c_test length:nLen encoding:enc];

创建一个mac os的工程，加入代码：

constNSStringEncoding*encodings=[NSStringavailableStringEncodings];

NSMutableString*str=[[NSMutableStringalloc]init];

NSStringEncodingencoding;

while((encoding=*encodings++)!=0)
{

[strappendFormat:@"%@===%li\n",[NSStringlocalizedNameOfStringEncoding:encoding],encoding];
}
NSLog(@"%@",str);

得到：

Western (Mac OS Roman) === 30

Japanese (Mac OS) === 2147483649

Traditional Chinese (Mac OS) === 2147483650

Korean (Mac OS) === 2147483651

Arabic (Mac OS) === 2147483652

Hebrew (Mac OS) === 2147483653

Greek (Mac OS) === 2147483654

Cyrillic (Mac OS) === 2147483655

Devanagari (Mac OS) === 2147483657

Gurmukhi (Mac OS) === 2147483658

Gujarati (Mac OS) === 2147483659

Thai (Mac OS) === 2147483669

Simplified Chinese (Mac OS) === 2147483673

Tibetan (Mac OS) === 2147483674

Central European (Mac OS) === 2147483677

Symbol (Mac OS) === 6

Dingbats (Mac OS) === 2147483682

Turkish (Mac OS) === 2147483683

Croatian (Mac OS) === 2147483684

Icelandic (Mac OS) === 2147483685

Romanian (Mac OS) === 2147483686

Celtic (Mac OS) === 2147483687

Gaelic (Mac OS) === 2147483688

Keyboard Symbols (Mac OS) === 2147483689

Farsi (Mac OS) === 2147483788

Cyrillic (Mac OS Ukrainian) === 2147483800

Inuit (Mac OS) === 2147483884

Unicode (UTF-16) === 10

Unicode (UTF-7) === 2214592768

Unicode (UTF-8) === 4

Unicode (UTF-32) === 2348810496

Unicode (UTF-16BE) === 2415919360

Unicode (UTF-16LE) === 2483028224

Unicode (UTF-32BE) === 2550137088

Unicode (UTF-32LE) === 2617245952

Western (ISO Latin 1) === 5

Central European (ISO Latin 2) === 9

Western (ISO Latin 3) === 2147484163

Central European (ISO Latin 4) === 2147484164

Cyrillic (ISO 8859-5) === 2147484165

Arabic (ISO 8859-6) === 2147484166

Greek (ISO 8859-7) === 2147484167

Hebrew (ISO 8859-8) === 2147484168

Turkish (ISO Latin 5) === 2147484169

Nordic (ISO Latin 6) === 2147484170

Thai (ISO 8859-11) === 2147484171

Baltic (ISO Latin 7) === 2147484173

Celtic (ISO Latin 8) === 2147484174

Western (ISO Latin 9) === 2147484175

Romanian (ISO Latin 10) === 2147484176

Latin-US (DOS) === 2147484672

Greek (DOS) === 2147484677

Baltic (DOS) === 2147484678

Western (DOS Latin 1) === 2147484688

Greek (DOS Greek 1) === 2147484689

Central European (DOS Latin 2) === 2147484690

Cyrillic (DOS) === 2147484691

Turkish (DOS) === 2147484692

Portuguese (DOS) === 2147484693

Icelandic (DOS) === 2147484694

Hebrew (DOS) === 2147484695

Canadian French (DOS) === 2147484696

Arabic (DOS) === 2147484697

Nordic (DOS) === 2147484698

Russian (DOS) === 2147484699

Greek (DOS Greek 2) === 2147484700

Thai (Windows, DOS) === 2147484701

Japanese (Windows, DOS) === 8

Simplified Chinese (Windows, DOS) === 2147484705

Korean (Windows, DOS) === 2147484706

Traditional Chinese (Windows, DOS) === 2147484707

Western (Windows Latin 1) === 12

Central European (Windows Latin 2) === 15

Cyrillic (Windows) === 11

Greek (Windows) === 13

Turkish (Windows Latin 5) === 14

Hebrew (Windows) === 2147484933

Arabic (Windows) === 2147484934

Baltic (Windows) === 2147484935

Vietnamese (Windows) === 2147484936

Western (ASCII) === 1

Japanese (Shift JIS X0213) === 2147485224

Chinese (GBK) === 2147485233

Chinese (GB 18030) === 2147485234

Japanese (ISO 2022-JP) === 21

Japanese (ISO 2022-JP-2) === 2147485729

Japanese (ISO 2022-JP-1) === 2147485730

Chinese (ISO 2022-CN) === 2147485744

Korean (ISO 2022-KR) === 2147485760

Japanese (EUC) === 3

Simplified Chinese (GB 2312) === 2147486000

Traditional Chinese (EUC) === 2147486001

Korean (EUC) === 2147486016

Japanese (Shift JIS) === 2147486209

Cyrillic (KOI8-R) === 2147486210

Traditional Chinese (Big 5) === 2147486211

Western (Mac Mail) === 2147486212

Simplified Chinese (HZ GB 2312) === 2147486213

Traditional Chinese (Big 5 HKSCS) === 2147486214

Ukrainian (KOI8-U) === 2147486216

Traditional Chinese (Big 5-E) === 2147486217

Western (NextStep) === 2

Non-lossy ASCII === 7

Western (EBCDIC Latin Core) === 2147486721

Western (EBCDIC Latin 1) === 2147486722

得到这么多神奇的数字，这些神奇的数字就是对应的编码格式。

http://blog.csdn.net/ydj213/article/details/8296414