objective-c Unicode转中文

- (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"];  
}