iPhone: What are the different kinds of encodings that dataUsingEncoding supports?

Can anyone point me to any article or document that lists a开发者_如何学运维ll the encoding types that "dataUsingEncoding" in iPhone supports?

//This can print all of encoding that iPhone supports
NSMutableArray *arrayOfEncodings = [[NSMutableArray alloc] init];

const NSStringEncoding *encodings = [NSString availableStringEncodings];
while (*encodings != 0){
    [arrayOfEncodings addObject:[NSNumber numberWithUnsignedLong:*encodings]];
    encodings++;
}

for (int i=0; i<arrayOfEncodings.count; i++) {
    NSStringEncoding aNSStringEncoding = [[arrayOfEncodings objectAtIndex:i] unsignedLongValue];
    CFStringEncoding aCFStringEncoding = CFStringConvertNSStringEncodingToEncoding(aNSStringEncoding);
    CFStringRef encodingNameInCFString = CFStringGetNameOfEncoding(aCFStringEncoding);
    NSString * encodingName = (NSString*)encodingNameInCFString;
    NSLog(@"%@", encodingName);
}

The NSString availableStringEncodings method will return a list of available encodings - the current (as of iOS 4.2) options being:

• NSASCIIStringEncoding
• NSUnicodeStringEncoding
• NSISOLatin1StringEncoding
• NSISOLatin2StringEncoding
• NSSymbolStringEncoding

[NSString availableStringEncodings]