如何从Web服务获取字典对象

Question

I'm using a web service that gives back JSON data of jobs. I have called the service and displayed ALL the JSON data as such:

- (void)viewDidLoad
{
[super viewDidLoad];

NSString *urlString = @"http://jobs.github.com/positions.json?description=python&location=new+york";

NSURL *url = [NSURL URLWithString:urlString];

NSData *data = [NSData dataWithContentsOfURL:url];

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

NSString *item = [json objectAtIndex:0];



NSLog(@"%@", item);



// Do any additional setup after loading the view.

}

So this returns one job with TON of information such as "description", "company name", "location". I want to be able to get JUST location or JUST description. How would I go about doing that?

All help is appreciated, thanks.

Answer 1

you get an array of dictionaries... replace

NSString *item = [json objectAtIndex:0];  //old

with

for(NSDictionary *item in jsonArray) {
  NSLog(@"Item desc : %@", item[@"description"]);
}

Answer 2

Reading the following article will give you a good grounding on parsing JSON data.

http://www.intertech.com/Blog/basic-json-parsing-in-ios/

Answer 3

In your case you can access it directly:

NSDictionary *item = [json objectAtIndex:0];
NSString *location = [item objectForKey:@"location"];
NSLog(@"%@", location);