reason = "\U8bf7\U6c42\U6210\U529f\Uff01"在iOS中怎么把这个转换为中文？

+(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 propertyListFromData:tempData
                                                       mutabilityOption:NSPropertyListImmutable
                                                                 format:NULL
                                                       errorDescription:NULL];
return [returnStr stringByReplacingOccurrencesOfString:@"\\r\\n"withString:@"\n"];

}