How to get data from JSON data - iphone

Question

I have JSON like this:
[{"ID" : "351", "Name" : "Cam123 ", "camIP" : "xxx.xxx.xxx.xxx",
"Username" : "admin", "Password" : "damin", "isSupportPin" : "1" },
{"ID" : "352", "Name" : "Cam122 ", "camIP" : "xxx.xxx.xxx.xxx",
"Username" : "admin", "Password" : "damin", "isSupportPin" : "0" }
]
I want to get isSupportPin with result: 1 or 0.
if (x == 1)
{
mybutton.enabled = TRUE;
}
else
{
mybutton.enabled = FALSE;
}
How I can do it?

Answer 1

Assuming you have an NSData object with this data in it:
// Your JSON is an array, so I'm assuming you already know
// this and know which element you need. For the purpose
// of this example, we'll assume you want the first element
NSData* jsonData = /* assume this is your data from somewhere */
NSError* error = nil;
NSArray* array = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];
if( !array ) {
// there was an error with the structure of the JSON data...
}
if( [array count] > 0 ) {
// we got our data in Foundation classes now...
NSDictionary* elementData = array[0]; // pick the correct element
// Now, extract the 'isSupportPin' attribute
NSNumber* isSupportPin = elementData[#"isSupportPin"];
// Enable the button per this item
[mybutton setEnabled:[isSupportPin boolValue]];
} else {
// Valid JSON data, but no elements... do something useful
}
The above example code snippet assumes you know which element you want to read (I guess these are user lines or something) and that you know what the JSON attribute names are (e.g., if isSupportPin isn't actually defined in the JSON object returned in that array, it will simply return nil, which will always evaluate to NO when you send it -boolValue).
Finally, the above code is written for ARC and requires Xcode 4.5 or Clang 4.1 and a deployment target of iOS 5.0. If you're not using ARC, building with a legacy version of Xcode, or targeting something earlier than 5.0, you'll have to adjust the code.

Answer 2

Here what you have is an NSArray of NSDictionarys. So using SBJSON library you could do as following
SBJsonParser *parser = [SBJsonParser alloc] init];
NSArray *data = [parser objectFromString:youJson];
for (NSDictionary *d in data)
{
NSString *value = [d objectForKey:#"Name"];
}
The library can be found at http://stig.github.com/json-framework/

Answer 3

Follow the below link that my help you.
http://www.xprogress.com/post-44-how-to-parse-json-files-on-iphone-in-objective-c-into-nsarray-and-nsdictionary/

Answer 4

If you want to get data or Dictionary fron JSONData then use bellow code..
NSString *responseString = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease];
NSArray *resultsArray = [responseString JSONValue];
for(NSDictionary *item in resultsArray)
{
NSDictionary *project = [item objectForKey:#"result"];//use your key name insted of result
NSLog(#"%#",project);
}
and also download JSON Library and tutorial from below link...
http://mobileorchard.com/tutorial-json-over-http-on-the-iphone/