项目中有评论的功能，当评论中有表情的时候不能正常显示，就需要将上传的text转成unicode，然后显示的时候在转成utf-8 直接上代码
中文转unicode：
- (NSString*)utf8ToUnicode:(NSString*)string
{
NSUIntegerlength = [stringlength];
NSMutableString *s = [NSMutableString stringWithCapacity:0];
for(inti =0;i < length; i++)
{
unichar_char = [stringcharacterAtIndex:i];
//判断是否为英文和数字
if(_char <='9'&& _char >='0')
{
[sappendFormat:@"%@",[string substringWithRange:NSMakeRange(i, 1)]];
}
elseif(_char >='a'&& _char <='z')
{
[sappendFormat:@"%@",[string substringWithRange:NSMakeRange(i, 1)]];
}
elseif(_char >='A'&& _char <='Z')
{
[sappendFormat:@"%@",[string substringWithRange:NSMakeRange(i, 1)]];
}
else
{
[sappendFormat:@"\\u%x",[stringcharacterAtIndex:i]];
}
}
returns;
}
然后是unicode转中文：
- (NSString*) replaceUnicode:(NSString*)TransformUnicodeString
{
NSString*tepStr1 = [TransformUnicodeString stringByReplacingOccurrencesOfString:@"\\u"withString:@"\\U"];
NSString*tepStr2 = [tepStr1 stringByReplacingOccurrencesOfString:@"\""withString:@"\\\""];
NSString*tepStr3 = [[@"\"" stringByAppendingString:tepStr2]stringByAppendingString:@"\""];
NSData*tepData = [tepStr3 dataUsingEncoding:NSUTF8StringEncoding];
NSString*axiba = [NSPropertyListSerialization propertyListWithData:tepData options:NSPropertyListMutableContainers
format:NULLerror:NULL];
return [axiba stringByReplacingOccurrencesOfString:@"\\r\\n"withString:@"\n"];
}