Your JSON is an array, but your code assumes it's a dictionary and tries to call -objectForKey:
on it. You might want to try the following:
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSArray *jsonData = [responseData objectFromJSONData];
for (NSDictionary *dict in jsonData) {
NSString *name = [dict objectForKey:@"name"];
NSLog(@"Name: %@", name);
}
}