删除重复的JSON数据对象IOS7

您好，在我的应用程序中，我正在使用

JSON

post方法将

sqlite3

数据库数据传递到我的在线服务器，在我打印

JSON

数据时，每条记录都有两条重复的记录，例如，我有一条名为xxx的记录，它在

JSON

中显示了三次，请告诉我如何删除重复的记录

 [_dataDictionary setObject:[NSString stringWithFormat:@"%@",field1Str] forKey:@"name"];
        [_dataDictionary setObject:[NSString stringWithFormat:@"%@",field2Str] forKey:@"phone"];
        [_dataDictionary setObject:[NSString stringWithFormat:@"%@",field3Str] forKey:@"city"];
        [_dataDictionary setObject:[NSString stringWithFormat:@"%@",field4Str] forKey:@"email"];

        [array addObject:_dataDictionary];


        NSData* jsonData = [NSJSONSerialization dataWithJSONObject:array options:kNilOptions error:nil];

        NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
        NSURL *someURLSetBefore =[NSURL URLWithString:@"url"];
        [request setURL:someURLSetBefore];
        [request setHTTPMethod:@"POST"];
        [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
        [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
        [request setHTTPBody:jsonData];

        // print json:
        NSLog(@"JSON summary: %@", [[NSString alloc] initWithData:jsonData
                                                         encoding:NSUTF8StringEncoding]);
        NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
        [connection start];

如果打印我已将数据存储到数据字典中的数组，该数组将正确显示，但在json中仅显示重复记录，请告诉我如何解决此问题

---

谢谢。

更改选项参数

options:kNilOptions

到

在这一行

 NSData* jsonData = [NSJSONSerialization dataWithJSONObject:array options:kNilOptions error:nil];

---

更改为NSJSONWritingPrettyPrinted后，未将其转换为json数据NSMUTABLEARRY*array=[[NSMUTABLEARRY alloc]init]；它的可变数组

 NSData* jsonData = [NSJSONSerialization dataWithJSONObject:array options:kNilOptions error:nil];