iOS \U6b3e转字符串

-(NSString *)replaceUnicode:(NSString *)unicodeStr
{
    NSString *tempStr1 = [unicodeStr stringByReplacingOccurrencesOfString:@"\\u"withString:@"\\U"];

    NSString *tempStr2 = [tempStr1 stringByReplacingOccurrencesOfString:@"\""withString:@"\\\""];

    NSString *tempStr3 = [[@"\""stringByAppendingString:tempStr2] stringByAppendingString:@"\""];

    NSData *tempData = [tempStr3 dataUsingEncoding:NSUTF8StringEncoding];

    ;

    NSString* returnStr = [NSPropertyListSerialization propertyListWithData:tempData options:NSPropertyListImmutable format:NULL error:NULL];

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