Re: [iPhone] Any way to animate a tab-bar away?
Re: [iPhone] Any way to animate a tab-bar away?
- Subject: Re: [iPhone] Any way to animate a tab-bar away?
- From: WT <email@hidden>
- Date: Fri, 22 May 2009 15:09:02 +0200
Hi Brian,
thanks for replying. Your suggestion didn't work and I suspect it was
because I'm not using a navigation controller. The UIView
documentation for the hidesBottomBarWhenPushed property seems to
suggest that it only has an effect when the view is pushed into a
navigation controller's stack.
In my app, the 4 views controlled by the tab-bar are not stacked, so
there is no need for a navigation controller more sophisticated than
the tab-bar controller. The only difference between the four views, as
far as navigation is concerned, is that switching into the game view
hides the tab-bar. One would reasonably think that your suggestion
would work in that case too, but it doesn't. :(
Wagner
On May 22, 2009, at 2:40 PM, Brian Slick wrote:
In the view you are animating in, perhaps in the -init method, you
can do this:
[self setHidesBottomBarWhenPushed: YES];
There may be a complication, since it looks like you would want to
do this on the top-most view controller for that tab. I've only
ever done it for subviews, so that the tab bar can reappear when
returning to the parent view. Maybe you could set this for the
'back side' view you are flipping in. Not sure.
Brian
On May 22, 2009, at 6:53 AM, WT wrote:
Hello,
when tapping one of the items in the tab-bar of my iPhone app, I'd
like to switch to a view that no longer has a tab-bar. I've
accomplished this already by having the tab-bar delegate remove the
tab-bar controller view from its superview (the window) and then
instal the new view. I even got it so that the two views flip like
in an utility app. Here's the code that does it:
[UIView beginAnimations: kAnimationIDSwitchIntoGameView context:
NULL];
[UIView setAnimationDelegate: self];
[UIView setAnimationDidStopSelector:
@selector(viewSwitchAnimDidStop:finished:context:)];
[UIView setAnimationDuration: kViewSwitchAnimDuration];
[UIView setAnimationCurve: UIViewAnimationCurveEaseInOut];
[UIView setAnimationTransition:
UIViewAnimationTransitionFlipFromRight
forView: window cache: YES];
[tabBarController.view removeFromSuperview];
[window addSubview: gameViewController.view];
[UIView commitAnimations];
There are two things I'm not happy about though:
1. I'd like the transition to occur in two steps, where the tab-bar
first slides down until it's gone, followed by the view flip. Is it
possible to animate the tab-bar view's frame out of the window? As
a UIView, I'd think so but then the docs say that we shouldn't
access the tab-bar view directly. I suppose I could just give it a
try, but I thought I'd ask people's input first, just in case there
may be some gotchas to look out for.
2. Once the flip happens, the new view is oddly sized, with a gap
at the bottom whose size matches the status bar. I realize that the
tab-bar resizes its current controller's view as needed, and I've
tried several combinations of the options in IB (setting the tab-
bar's controller for that one item to auto-resize or not to auto-
resize its view and changing the autoresizing behaviors of the view
in question are the two most promising ones), but I still can't get
the new view to appear correctly sized. I must admit that I don't
really understand the precise rules followed by the tab-bar
controller in regards to resizing its current view controller's
view. Also, I suspect there's some code I have to write to
compensate for killing the tab-bar, but it's not clear to me what
it should be.
You can see what I'm referring to here:
http://www.restlessbrain.com/cocoa-dev/tab-bar.mov
http://www.restlessbrain.com/cocoa-dev/bg_imgview_IB_1.png
http://www.restlessbrain.com/cocoa-dev/bg_imgview_IB_2.png
http://www.restlessbrain.com/cocoa-dev/gameview_IB_1.png
http://www.restlessbrain.com/cocoa-dev/gameview_IB_2.png
http://www.restlessbrain.com/cocoa-dev/tabbar_IB.png
Any help is greatly appreciated.
Wagner
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