Question

I’m getting frustrated at this.

I want to create an iPhone application to show a list of events, one day for each ‘screen’. I want a bar at the top with ‘next’ and ‘prev’ buttons that allow me to go to tomorrow or yesterday.

It is not a UINavigationController style navigation, because navigation is not hierarchical. Therefore I don’t think I should use the pushViewController: method, as many examples and tutorials suggest.

I think that the appdelegate class should remove the current view and create a new viewcontroller and view and add it to the window. However I can’t manage to get it working. Also I would like nice transitions.

Can someone point to a code sample that I can look at?

Thank you.

P.D. My question is similar to this one but there is no useful answer.

Answer 1

Now it works. Just some details were missing. I’ll leave the answer here so that other people can comment on it or use it.

In the AppDelegate class I added this method:

-(void) navigateToDay:(NSDate*) newDay fromDay:(NSDate*) currentDay
{
    UIViewAnimationTransition transition = ([newDay compare:currentDay]<0)? UIViewAnimationTransitionCurlDown :
        UIViewAnimationTransitionCurlUp;

    SequentialNavigationViewController* newController = [[SequentialNavigationViewController alloc] initWithNibName:@"SequentialNavigationViewController" bundle:nil];

    newController.app = self;
    newController.currentDay = newDay;
    [newController.view setFrame:[[UIScreen mainScreen] applicationFrame]];

    [UIView beginAnimations:@"transition" context:NULL];
    [UIView setAnimationDuration:0.50];
    [UIView setAnimationTransition:transition forView:self.window cache:YES];
    [window addSubview:newController.view];
    [self.viewController.view removeFromSuperview];
    [UIView commitAnimations];

    self.viewController = newController;
    [newController release];
   }

And I call this method from the SequentialNavigationViewController prevButtonClicked and nextButtonClicked methods.

Not so hard after all!