iPhone: Animating a view when another view appears/disappears
- by MacTouch
I have the following view hierarchy
UITabBarController
- UINavigationController
- UITableViewController
When the table view appears (animated) I create a toolbar and add it as subview of the TabBar at the bottom of the page
and let it animate in with the table view. Same procedure in other direction, when the table view disappears.
It does not work as expected.
The animation duration is OK, but somehow not exact the same as the animation of the table view when it becomes visible
When I display the table view for the second time, the toolbar does not disappear at all and remains at the bottom of the
parent view.
What's wrong with it?
- (void)animationDone:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context
{
UIView *toolBar = [[[self tabBarController] view] viewWithTag:1000];
[toolBar removeFromSuperview];
}
- (void)viewWillAppear:(BOOL)animated
{
UIEdgeInsets insets = UIEdgeInsetsMake(0, 0, 44, 0);
[[self tableView] setContentInset:insets];
[[self tableView] setScrollIndicatorInsets:insets];
// Toolbar initially placed outside of the visible frame (x=320)
UIView *toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(320, 480-44, 320, 44)];
[toolBar setTag:1000];
[[[self tabBarController] view] addSubview:toolBar];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:0.35];
[toolBar setFrame:CGRectMake(0, 480-44, 320, 44)];
[UIView commitAnimations];
[toolBar release];
[super viewWillAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated
{
UIView *toolBar = [[[self tabBarController] view] viewWithTag:1000];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:0.35];
[UIView setAnimationDidStopSelector:@selector(animationDone:finished:context:)];
[toolBar setFrame:CGRectMake(320, 480-44, 320, 44)];
[UIView commitAnimations];
[super viewWillDisappear:animated];
}
