iOS Developer iOS Developer - 3 months ago 17
JSON Question

Converting an NSArray of Dictionaries to JSON array in iOS

I need to send an

NSArray
to the server in the
JSON
array format. How can I convert it to
JSON
. This is a sample of my
NSArray
that I have to pass.

array([0] => array('latitude'=>'10.010490',
'longitude'=>'76.360779',
'altitude'=>'30.833334',
'timestamp'=>'11:17:23',
'speed'=>'0.00',
'distance'=>'0.00');

[1] => array('latitude'=>'10.010688',
'longitude'=>'76.361378',
'altitude'=>'28.546305',
'timestamp'=>'11:19:26',
'speed'=>'1.614',
'distance'=>'198.525711')
)`


and the required format is like this

[
{ "latitude":"10.010490",
"longitude":"76.360779",
"altitude":"30.833334",
"timestamp":"11:17:23",
"speed":"0.00",
"distance":"0.00"
},
{
"latitude":"10.010688",
"longitude":"76.361378",
"altitude":"28.546305",
"timestamp":"11:19:26",
"speed":"1.614",
"distance":"198.525711"
}
]


Any one have solution? Thanks in advance.

Answer
NSDictionary *firstJsonDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
                            @"10.010490", @"latitude",
                            @"76.360779", @"longitude",
                            @"30.833334", @"altitude",
                            @"11:17:23", @"timestamp",
                            @"0.00", @"speed",
                            @"0.00", @"distance",
                            nil];

  NSDictionary *secondJsonDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
                            @"10.010490", @"latitude",
                            @"76.360779", @"longitude",
                            @"30.833334", @"altitude",
                            @"11:17:23", @"timestamp",
                            @"0.00", @"speed",
                            @"0.00", @"distance",
                            nil];

NSMutableArray * arr = [[NSMutableArray alloc] init];

[arr addObject:firstJsonDictionary];
[arr addObject:secondJsonDictionary];

NSData *jsonData2 = [NSJSONSerialization dataWithJSONObject:arr options:NSJSONWritingPrettyPrinted error:&error];
NSString *jsonString = [[NSString alloc] initWithData:jsonData2 encoding:NSUTF8StringEncoding];
NSLog(@"jsonData as string:\n%@", jsonString);
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