Question

This is my second day programming in ObjectiveC so I apologize for the noob question.

I have a ViewController that does an API call using async and asihttprequest:

@synthesize loadingStatus;
- (void)loadStatsData
{
    [indicator setHidden:NO];

    loadingStatus = [NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:@"bad", nil] forKeys:[NSArray arrayWithObjects:@"amount", nil ] ];

    [RESTApiController request:@"/method.json" method:@"GET" options:[NSDictionary dictionaryWithObjects:[NSArray arrayWithObject:@"amount"] forKeys:[NSArray arrayWithObject:@"receiving"] ] parent:self];
}

and receiving it like this:

- (void)requestFinished:(ASIHTTPRequest *)request
{
    if (receiving == @"amount")
    {
      // do stuff
      [loadingStatus setValue:@"good" forKey:@"amount"];
    }

    if ([loadingStatus valueForKey:@"amount"] == @"good"]) 
      [indicator setHidden:YES];
}

The app crashes when it tries to use the loadingStatus variable in requestFinished(). I guess somehow the variable gets dellocated, but I’m unsure as how to approach this.

Two questions:
1) How can I keep loadingStatus’s state across methods calls so I can use it in the way I wrote the code
2) Is there a better way of achieving my goal of checking if API calls are completed and hiding the ActivityIndicator?

-M.

Answer 1

Do it this way: refer to loadingStatus as self.loadingStatus

self.loadingStatus = [NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:@"bad", nil] forKeys:[NSArray arrayWithObjects:@"amount", nil ] ];

That way, it goes through the accessor, and does a retain on it (the @property part in .h file).

Also, programming hint: break your lines into smaller statements so they are easier to debug.