How to fetch data from this json - ios

Question

I want this data to be displayed in the tableview . can anyone tell me how to take data in the dictionary or array and display in the table? the data is shown as under
I want to display city and custno
{
"Status": 200,
"data": [
{
"dispatch": "11111",
"locname": "Sample Company Location 1",
"add1": "226 Engleman Street",
"city": "Bardstown",
"state": "KY",
"zip": "40004",
"contacts": [
{
"id": "1",
"custno": "0000235",
"locno": "00001",
"salutation": "Mr.",
"jobtitle": "IT Manager",
"locktime": "",
"lockby": ""
},
{
"id": "11",
"custno": "0000235",
"locno": "00001",
"contact": "Greg C",
"extension": "205",
"salutation": "Mr. ",
"jobtitle": "President",
"locktime": null,
"lockby": null
},
{
"id": "12",
"custno": "0000235",
"locno": "00001",
"extension": "206",
"salutation": "Mr.",
"jobtitle": "Parts Manager",
"locktime": null,
"lockby": null
},
{
"id": "13",
"custno": "0000235",
"locno": "00001",
"extension": "202",
"salutation": "Mr.",
"jobtitle": "Service Manager",
"locktime": "",
"lockby": ""
}
],
"locationnotes": "5/20/2010 9:32:06 PM - Updated Information1111111",
"custno": "0000235",
"locno": "00001",
"calledinby": "Teresa",
"serviceagrno": "",
"dispatchnotes": "This is a test dispatch",
"pastcustomernotes": "",
"pasttechnotes": [],
"status": "Pending",
"locationimage": "/images/content/2t_1318687848_100x100.gif",
"pmstatus": "Yes"
},
{
"dispatch": "4",
"locname": "Sample Company Location 1",
"add1": "226 Engleman Street",
"city": "Bardstown",
"state": "KY",
"zip": "40004",
"contacts": [
{
"id": "1",
"custno": "0000235",
"locno": "00001",
"extension": "200",
"salutation": "Mr.",
"jobtitle": "IT Manager",
"locktime": "",
"lockby": ""
},
{
"id": "11",
"custno": "0000235",
"locno": "00001",
"phonefax": "555-555-1002",
"extension": "205",
"salutation": "Mr. ",
"jobtitle": "President",
"locktime": null,
"lockby": null
},
{
"id": "12",
"custno": "0000235",
"locno": "00001",
"extension": "206",
"salutation": "Mr.",
"jobtitle": "Parts Manager",
"locktime": null,
"lockby": null
},
{
"id": "13",
"custno": "0000235",
"locno": "00001",
"extension": "202",
"salutation": "Mr.",
"jobtitle": "Service Manager",
"locktime": "",
"lockby": ""
}
],
"locationnotes": "5/20/2010 9:32:06 PM - Updated Information1111111",
"custno": "0000235",
"locno": "00001",
"calledinby": "Teresa",
"serviceagrno": null,
"dispatchnotes": "11/3/2011 7:59 - This is a sample ATM call.",
"pastcustomernotes": "",
"pasttechnotes": [],
"status": "Pending",
"locationimage": "/images/content/2t_1318687848_100x100.gif",
"pmstatus": "No"
},
{
"dispatch": "5",
"locname": "Sample Company Location 1",
"add1": "226 Engleman Street",
"city": "Bardstown",
"state": "KY",
"zip": "40004",
"contacts": [
{
"id": "1",
"custno": "0000235",
"locno": "00001",
"contact": "Michael B",
"email": "michael#bonzahouse.com",
"phoneoffice": "502-555-1000",
"phonemobile": "502-555-0769",
"phonefax": "555-555-1002",
"extension": "200",
"salutation": "Mr.",
"jobtitle": "IT Manager",
"locktime": "",
"lockby": ""
},
{
"id": "11",
"custno": "0000235",
"locno": "00001",
"extension": "205",
"salutation": "Mr. ",
"jobtitle": "President",
"locktime": null,
"lockby": null
},
{
"id": "12",
"custno": "0000235",
"locno": "00001",
"extension": "206",
"salutation": "Mr.",
"jobtitle": "Parts Manager",
"locktime": null,
"lockby": null
},
{
"id": "13",
"custno": "0000235",
"locno": "00001",
"extension": "202",
"salutation": "Mr.",
"jobtitle": "Service Manager",
"locktime": "",
"lockby": ""
}
],
"locationnotes": "5/20/2010 9:32:06 PM - Updated Information1111111",
"custno": "0000235",
"locno": "00001",
"calledinby": "",
"serviceagrno": null,
"dispatchnotes": "",
"pastcustomernotes": "",
"pasttechnotes": [],
"status": "Pending",
"locationimage": "/images/content/2t_1318687848_100x100.gif",
"pmstatus": "Yes"
}
]
}

Answer 1

You need to read that into an NSDictionary with either NSJSONSerialization (only available in iOS 5 and later) or another JSON framework (I recommend TouchJSON - https://github.com/TouchCode/TouchJSON).
Here are examples:
NSJSONSerialization:
NSString *jsonString = <JSON_STRING>;
NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
NSError *error = nil;
NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:jsonData
options:0
error:&error];
TouchJSON:
NSString *jsonString = <JSON_STRING>;
NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
NSError *error = nil;
NSDictionary *dictionary = [[CJSONDeserializer deserializer]
deserializeAsDictionary:jsonData
error:&error];
Once you have the dictionary you can then extract the information you want. In your case it looks like you want to grab the data which is an array of objects. I assume you then want to show something about those objects in a table. So here's the start of that code to get you going and then you should be able to figure out the rest:
NSArray *data = [dictionary objectForKey:#"data"];
// Then for each data object, you can get at say its `locname' attribute to show in a cell like so
NSString *locname = [[data objectAtIndex:i] objectForKey:#"locname"];