iOS开发之JSONKit

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions  
{  
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];  
    NSURL *url = [NSURL URLWithString:@"https://itunes.apple.com/lookup?id=284910350"];  
    NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url];  
    NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];  
    [self.window makeKeyAndVisible];  
    return YES;  
}  

//代理方法
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
    NSString *outString = [[NSString alloc] initWithData:data encoding: NSUTF8StringEncoding];  
    NSData *jsonData = [outString dataUsingEncoding:NSUTF8StringEncoding];  
    NSDictionary *dic = [jsonData objectFromJSONData];  
    NSArray *dic1 = [dic objectForKey:@"results"];  
    NSDictionary *dic2 = [dic1 objectAtIndex:0];  
    NSLog(@"%@", [dic2 objectForKey:@"version"]);  
}