Parse json array on iOS

Question

I have the following JSON data:

[{"id":"value","first_name":"value","last_name":"value"},
 {"id":"value","first_name":"value","last_name":"value"},
 {"id":"value","first_name":"","last_name":""}]

Then I implement my code :

NSError *err;
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://abcd.com/index.php?r=WS/Employee"]];
NSData *dataFromUrl = [NSData dataWithContentsOfURL:url];
NSMutableArray *array = [NSJSONSerialization JSONObjectWithData:dataFromUrl options: NSJSONReadingMutableContainers error:&err];

if (err)
    NSLog(@"JSONObjectWithData error: %@", err);

For which, I get the following error message:

JSONObjectWithData error: Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (JSON text did not start with array or object and option to allow fragments not set.) UserInfo=0x9c900f0 {NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}

Please help me to get those data.

there's something else coming with this json in response of your service.. — Ahmed Z.
– Ahmed Z., Commented Aug 13, 2014 at 8:25
How is the JSON created? Is it encoded using a valid JSON encoding? UTF-8, UTF-16LE, UTF-16BE, UTF-32LE or UTF-32BE — KerrM
– KerrM, Commented Aug 13, 2014 at 8:30
I use PHP to create it. echo "<meta charset=\"utf-8\">"; echo json_encode($r); — Bancha Rojkittisakul
– Bancha Rojkittisakul, Commented Aug 13, 2014 at 8:42
Try removing the meta-data tag. You should use the http header content-type instead. — ullstrm
– ullstrm, Commented Aug 13, 2014 at 9:01
I can fix this with "header('Content-type: application/json');" — Bancha Rojkittisakul
– Bancha Rojkittisakul, Commented Aug 13, 2014 at 9:04

Andrey Gagan · Accepted Answer · 2014-08-13 08:33:22Z

1

I think u should put something more in request header. Try convert NSData to NSString and look what is comming for you

answered Aug 13, 2014 at 8:33

Andrey Gagan

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2 Comments

Bancha Rojkittisakul Over a year ago

NSLog(@"%@",[[NSString alloc]initWithData:dataFromUrl encoding:NSUTF8StringEncoding]); And I get collect messages as I post JSON data above

Andrey Gagan Over a year ago

try to use this library github.com/icanzilb/JSONModel They have their own built-in HTTP client.

Bancha Rojkittisakul · Accepted Answer · 2014-08-13 09:08:01Z

1

I fix this by replace request header in my PHP file from

echo "<meta charset=\"utf-8\">";

to

 ob_start();
 header('Content-type: application/json');

answered Aug 13, 2014 at 9:08

Bancha Rojkittisakul

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Comments

Shanthanu · Accepted Answer · 2014-08-13 08:57:28Z

0

try this code....

NSURL * url =[NSURL URLWithString:getDataURL];
NSData * data=[NSData dataWithContentsOfURL:url];

json =[NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];

answered Aug 13, 2014 at 8:57

Shanthanu

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Comments

BHASKAR · Accepted Answer · 2014-08-13 09:06:33Z

NSError *err;
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://abcd.com/index.php?r=WS/Employee"]];
NSData *dataFromUrl = [NSData dataWithContentsOfURL:url];
NSMutableArray *array = [NSJSONSerialization JSONObjectWithData:dataFromUrl options:     NSJSONReadingMutableContainers error:&err];

if (err)
   NSLog(@"JSONObjectWithData error: %@", err);

Just Change your line

NSMutableArray *array = [NSJSONSerialization JSONObjectWithData:dataFromUrl options:     NSJSONReadingMutableContainers error:&err];

with

NSJSONSerialization *jsonData = [NSJSONSerialization JSONObjectWithData:dataFromUrl options:     NSJSONReadingMutableContainers error:&err];
NSMutableArray *array = [NSMutableArray arrayWithArray:(NSArray *)jsonData];
NSLog(@"Success:%@", array);

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