Question

I have a View that has a UIWebView, and an OptionsPane (Custom UIViewController with Custom view).

I want when the view is shown, for the options pane (located on the top of the main view) to FLIP into place. I am using the code, and I am getting a strange result.

The FIRST time the view is shown, the options pane seems to already be visible… When I hit BACK on my navController, and pull up the View again, the animation works perfectly.

Can anyone shed some light on this topic?

- (void)viewDidLoad {
    [super viewDidLoad];
    optionsPane=[[OptionsPaneController alloc] initWithNibName:@"OptionsPane" bundle:nil];
}

- (void)viewWillAppear:(BOOL)animated {

    [optionsPane.view removeFromSuperview];
    [self checkOptionsVisible];
}

-(void)checkOptionsVisible{
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5]; 
    [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:[optionsPane view] cache:YES];
    [[self view] addSubview:[optionsPane view]];
    [theWebView setFrame:CGRectMake(0,87,320,230)];
    [[optionsPane view] setFrame:CGRectMake(0,0,320,87)];
    [UIView commitAnimations];      
}

Answer 1

If I understand what your explaining, I had a very similar problem the other day.

What happening on the first load is that viewDidLoad fires first. loading the nib file takes a bit more time than it takes for the viewWillAppear to fire itself.

What we’re getting is a nib loads after the viewWillApper already retired.

On any load after that, the viewDidLoad will not fire, letting the viewWillAppear to do its loyal flipping job.

What to do?
First, try to change your code to use “viewDidAppear”. That should help, but you have to see if it looks good.

Another option (ugly one, I know) is to have a call to checkOptionsVisible on the viewDidLoad too.
If non of that help, I would consider a timer as a hack – if the requirements allow it.

I hope that make you closer to solve the problem.