Question

I have a UIView that contains a subview called menuView managed by a MenuViewController.

I wrote that code :

- (void) viewDidLoad
{
    [self.menuView setFrame:CGRectOffset(self.menuView.frame, 0.0, self.menuView.frame.size.height)];
    [super viewDidLoad];
}

- (void) viewDidAppear:(BOOL)animated
{
    [UIView beginAnimations:@"SomeAnimation" context:nil];
    [UIView setAnimationDuration:2.0];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationTransition:UIViewAnimationTransitionNone forView:self.menuView cache:YES];           
    [self.menuView setFrame:CGRectOffset(self.menuView.frame, 0.0, -self.menuView.frame.size.height)];

    [UIView commitAnimations];

    [super viewDidAppear:animated];   // tried at begining too
}

But when loaded, no animation is visible… I also tried with viewWillAppear with no change.

it is called outside MenuViewController with :

- (IBAction) showMenu
{
    MenuViewController* menuController = [[MenuViewController alloc] initWithNibName:@"Menu" bundle:nil];];
    [self.view addSubview:menuController.view];
//    [menuController release];   for try
}

What’s the problem ?

P.S. : What I want to do is when the view is displayed, some part of that view (the menuView) move. That view (partially transparent) is intended to cover a superview that is owned by another ViewController.

Answer 1

Are you calling the viewDidAppear method from your view controller? Some controllers, such as the UINavigationController, will take care of that, but if you’re using a custom controller, you’ll need to call it. Typically, you would call viewWillAppear, then add the view, the call viewDidAppear.

So your code block would be:

- (IBAction) showMenu
{
    MenuViewController* menuController = [[MenuViewController alloc] initWithNibName:@"Menu" bundle:nil];];
    [menuController viewWillAppear:YES];
    [self.view addSubview:menuController.view];
    [menuController viewDidlAppear:YES];
    [menuController release];
}