Question

I can’t figure out why this UIView doesn’t display correctly when the method is called. It works in another view controller. When I try it in the RootViewController the NSLog output works fine, but no view animates. I’m wondering if it does display but is hidden from view. Any help would be great.

 - (IBAction)showView:(id)sender{

     NSLog(@"showView button pressed");

     [self.view addSubview: menuView];
     [self.view bringSubviewToFront:menuView];

     CGRect rect = menuView.frame;
     rect.origin.x = 60;
     rect.origin.y = -400;
     menuView.frame = rect;
     [UIView beginAnimations:@"ShowView" context:nil];
     [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
     [UIView setAnimationDuration:0.5]; 
     rect.origin.y = 65;
     menuView.frame = rect;

     [UIView commitAnimations];

 }

Answer 1

This worked in your RootViewController, then you copied the showView: code into a new view controller and it doesn’t work. Your conversation with @kl94 explains the rest. The menuView has been declared but not initialized in the new view controller.

I think if you go back to RootViewController where it’s working, you’ll find code where menuView is initialized: …menuView = [[SomeViewClass alloc] init….. That code needs to get copied to the new view controller, too. A decent place to put it is in the viewDidLoad method.

I agree with @Amiramix that the block animation is the way to go. I’d suggest code as follows:

- (void)viewDidLoad {
    [super viewDidLoad];
    // code copied from RootViewController that initializes menuView
    // probably, the frame is set so that the menu is positioned off the visible part of the view
    [self.view addSubview:menuView];
}

- (IBAction)showView:(id)sender{

    NSLog(@"showView button pressed, menu view is %@", menuView);

    [UIView animateWithDuration:0.5 animations:^{
        menuView.frame = CGRectMake(/* the rect where you want the menu to end up */);
    }];
 }