Tuesday, May 21, 2013

NSString NSUTF32LittleEndianStringEncoding example ios


String Encodings - NSUTF32LittleEndianStringEncoding

The following constants are provided by NSString as possible string encodings.
enum {
   NSASCIIStringEncoding = 1,
   NSNEXTSTEPStringEncoding = 2,
   NSJapaneseEUCStringEncoding = 3,
   NSUTF8StringEncoding = 4,
   NSISOLatin1StringEncoding = 5,
   NSSymbolStringEncoding = 6,
   NSNonLossyASCIIStringEncoding = 7,
   NSShiftJISStringEncoding = 8,
   NSISOLatin2StringEncoding = 9,
   NSUnicodeStringEncoding = 10,
   NSWindowsCP1251StringEncoding = 11,
   NSWindowsCP1252StringEncoding = 12,
   NSWindowsCP1253StringEncoding = 13,
   NSWindowsCP1254StringEncoding = 14,
   NSWindowsCP1250StringEncoding = 15,
   NSISO2022JPStringEncoding = 21,
   NSMacOSRomanStringEncoding = 30,
   NSUTF16StringEncoding = NSUnicodeStringEncoding,
   NSUTF16BigEndianStringEncoding = 0x90000100,
   NSUTF16LittleEndianStringEncoding = 0x94000100,
   NSUTF32StringEncoding = 0x8c000100,
   NSUTF32BigEndianStringEncoding = 0x98000100,
   NSUTF32LittleEndianStringEncoding = 0x9c000100,
   NSProprietaryStringEncoding = 65536
};
Constants
NSUTF32LittleEndianStringEncoding
NSUTF32StringEncoding encoding with explicit endianness specified.
Discussion of [NSString NSUTF32LittleEndianStringEncoding]
These values represent the various character encodings supported by the NSStringclasses. This is an incomplete list. Additional encodings are defined in String Programming Guide for Core Foundation (see CFStringEncodingExt.h); these encodings can be used with NSString by first passing the Core Foundation encoding to the CFStringConvertEncodingToNSStringEncoding function.



Example of [NSString NSUTF32LittleEndianStringEncoding]

NSString *str = @"😄 H€llö Wòrld";
NSData *data = [str dataUsingEncoding:NSUTF32LittleEndianStringEncoding];
NSLog(@"%@", data);

const uint8_t *bytes = [data bytes]; // pointer to converted bytes
NSUInteger length = [data length];   // number of converted bytes

Example of [NSString NSUTF32LittleEndianStringEncoding]
- (void)GetData
{
    url = [NSURL URLWithString:@"http://ar2.co/savola/"];
    jsonreturn = [[NSString alloc] initWithContentsOfURL:url];
    NSLog(jsonreturn);
    jsonData = [jsonreturn dataUsingEncoding:NSUTF32LittleEndianStringEncoding];
    dict = [[[CJSONDeserializer deserializer] deserializeAsDictionary:jsonData error:&error] retain];
    rows = [dict objectForKey:@"savola"];
    NSLog(@"Array: %@",rows);

   [yourTable reloadData];
}
Example of [NSString NSUTF32LittleEndianStringEncoding]
NSString* result = [[NSString alloc] initWithBytes: (const void*)buffer 
                                            length: sizeof(wchar_t) * numberOfCharsInBuffer
                                          encoding: NSUTF32LittleEndianStringEncoding];