Question

I can successfully parse the contents of a JSON file, using the JSON-Framework 3.0, but I’m not being able to extract all elements of the NSArray.

The app crashes at this line (shown below) link = [myJsonArray objectAtIndex:0]; giving me this message on the console: -[__NSCFDictionary objectAtIndex:]: unrecognized selector sent to instance 0x70ea20.

Here is my code:

NSError *error;
NSString *link;
NSArray *myJsonArray;

NSString *jsonString = [[NSString alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"myJSONfile" ofType:@"json"] encoding:NSUTF8StringEncoding error:&error];

SBJsonParser *parser = [[SBJsonParser alloc] init];
myJsonArray = [[parser objectWithString:jsonString error:&error] copy];
[parser release];

link = [myJsonArray objectAtIndex:0]; 

NSLog(@"json returns: %@", myJsonArray);

And here is my JSON file:

{
   "Programs": [
      {"link1": "http://www.myWebSite1.aspx",
       "program name": "Live Show at 9",
       "speaker": "Dr. Speaker 1"},
      {"link2": "http://www.myWebSite2.aspx",
       "name": "Dr. Speaker 2",
       "speaker": "Live Show at 10"}
   ]
}

This is the Log Output:

 JSON Output: {

  Programs =     (
      {
       link1: "http://www.myWebSite1.aspx",
       program name: "Live Show at 9",
       speaker: "Dr. Speaker 1"},

     {link2: "http://www.myWebSite2.aspx",
      program name: "Dr. Speaker 2",
      speaker: "Live Show at 10"}
 );
}

What Am I doing wrong? Thanks for your help!

Answer 1

To access the link1 value you should use:

[[[myJsonArray objectForKey:@"Programs"] objectAtIndex:0] objectForKey:@"link1"]