ios 汉字转码 （汉字与utf8、Unicode转与汉字）

Unicode转化为汉字:

+(NSString *)replaceUnicode:(NSString*)unicodeStr{

NSString *tempStr1=[unicodeStrstringByReplacingOccurrencesOfString:@"\\u"withString:@"\\U"];
NSString *tempStr2=[tempStr1stringByReplacingOccurrencesOfString:@"\""withString:@"\\\""];
NSString *tempStr3=[[@"\""stringByAppendingString:tempStr2]stringByAppendingString:@"\""];
NSData *tempData=[tempStr3dataUsingEncoding:NSUTF8StringEncoding];
NSString* returnStr =[NSPropertyListSerializationpropertyListFromData:tempData
mutabilityOption:NSPropertyListImmutable
format:NULL
errorDescription:NULL];

return [returnStrstringByReplacingOccurrencesOfString:@"\\r\\n"withString:@"\n"];
}

 

汉字与utf8相互转化:

NSString* strA =[@"%E4%B8%AD%E5%9B%BD"stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString *strB=[@"中国"stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

 

NSString 转化为utf8:

NSString *strings=[NSStringstringWithFormat:@"abc"];

NSLog(@"strings :%@",strings);

CF_EXPORT
CFStringRef CFURLCreateStringByAddingPercentEscapes(CFAllocatorRef allocator,CFStringReforiginalString,CFStringRef charactersToLeaved, CFStringReflegalURLCharactersToBeEscaped,CFStringEncoding encoding);

NSString *encodedValue=(__bridge NSString*)CFURLCreateStringByAddingPercentEscapes(nil,(__bridgeCFStringRef)strings,nil,(CFStringRef)@"!*'();:@&=+$,/?%#[]",kCFStringEncodingUTF8);

 

iso8859－1 到 unicode编码转换:

+(NSString *)changeISO88591StringToUnicodeString:(NSString*)iso88591String
{

NSMutableString *srcString=[[[NSMutableString alloc]initWithString:iso88591String]autorelease];

[srcString replaceOccurrencesOfString:@"&" withString:@"&" options:NSLiteralSearchrange:NSMakeRange(0,[srcString length])];
[srcString replaceOccurrencesOfString:@"&#x" withString:@"" options:NSLiteralSearchrange:NSMakeRange(0,[srcString length])];

NSMutableString *desString=[[[NSMutableString alloc]init] autorelease];

NSArray *arr=[srcString componentsSeparatedByString:@";"];

for(int i=0;i<[arr count]-1;i++){

NSString *v=[arr objectAtIndex:i];
char *c= malloc(3);
int value =[StringUtil changeHexStringToDecimal:v];
c[1]= value &0x00FF;
c[0]= value >>8&0x00FF;
c[2]='\0';
[desString appendString:[NSString stringWithCString:c encoding:NSUnicodeStringEncoding]];
free(c);
}

return desString;
}