Question

Hi I have an web service based app that will interchange data with our server. Since I have a dedicated class doing my work, the main view controller will actually call the worker every time. The worker itself knows when the connection finished since it is a NSURLConnectionDelegate. However I need to inform the main view controller whenever the work is done. The worker is a delegate of main view controller so it knows when it need to start working. Please help me.

Answer 1

You should do the other way around.

First declare your worker object as a member of your main view controller(and of course, make it a property), then from you main view controller, you can just call [self.worker sendRequstToServer] to send the request.

Second, within your main view controller, wherever you initialize your work object, don’t forget to put self = worker.delegate.

Third, declare a delegate method in your worker class, something like -(void)webServiceCallFinished(), and call [self.delegate webServiceCallFinished] in your worker’s -connectionDidFinishLoading() (you might wanna do in -parserDidEndDocument() if you are using NSXMLParer to parse xml)

Last, you wanna declare your main view controller as the delegate of your worker class and implement -webServiceCallFinished().

Hope this helps.