Re: Presenting modal vc repositions root vc
Well, by chance I found the cause of the problem, although I don't understand
why. In my root view controller, I had this code, based on a StackOverflow
answer I found about positioning a custom UIToolbar such that it would not be
obscured by the status bar:
- (void)
viewWillLayoutSubviews
{
self.view.frame = [UIScreen mainScreen].applicationFrame;
[super viewWillLayoutSubviews];
}
I did this many months ago, probably before this technote:
https://developer.apple.com/library/ios/qa/qa1797/_index.html
Anyway, removing that fixed all the weird behaviors. I don't know how or why.
It seems that presenting a modal, full-screen VC from the root VC shortly after
viewDidAppear causes a couple of things:
- The current root view controller is removed from the window, and the
presented VC is made the root.
- The application frame changes size.
Removing that code, and installing the top layout guide constraint on the
UIToolbar seems to have fixed the resize issue, but not another issue I have
where removing a sub view of the root view controller causes the
UIBarButtonItems' text to shrink. This one still eludes me.
On Jan 25, 2014, at 16:37 , Rick Mann rm...@latencyzero.com wrote:
I can't figure this out. I've got a view hierarchy that's been working fine.
I added a modal, full-screen tutorial to my storyboard that's triggered on a
segue from a button in a popover-contained table view. That works fine, too.
Now I'm trying to display the same tutorial the first time the user runs the
app. I get it from the root view controller's storyboard, and call -[self
presentViewController:animated:completion:] on it. Just before presenting it,
I see my entire view hierarchy shrink down (to what might be portrait width
in landscape mode; it's a landscape-only app). Elements inside a smaller,
too, not just repositioned.
After the modal VC is dismissed, you see the shrunken view, then it snaps
back to full size, but the UIBarButtonItems stay shrunken.
Why is this happening? Why does Apple not test anything any more?
--
Rick
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Rick
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Re: Presenting modal vc repositions root vc
On Jan 27, 2014, at 2:44 PM, Rick Mann rm...@latencyzero.com wrote:
Well, by chance I found the cause of the problem, although I don't understand
why. In my root view controller, I had this code, based on a StackOverflow
answer I found about positioning a custom UIToolbar such that it would not be
obscured by the status bar:
- (void)
viewWillLayoutSubviews
{
self.view.frame = [UIScreen mainScreen].applicationFrame;
[super viewWillLayoutSubviews];
}
Basically a view or view controller should never modify their external
coordinate system, and this does that. There are a great many places where a
parent view controller or window assume they have full control over the views
of their children, and doing stuff like this breaks that control pretty
handidly.
--
David Duncan
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Re: Presenting modal vc repositions root vc
On Jan 27, 2014, at 14:57 , David Duncan david.dun...@apple.com wrote: Basically a view or view controller should never modify their external coordinate system, and this does that. There are a great many places where a parent view controller or window assume they have full control over the views of their children, and doing stuff like this breaks that control pretty handidly. Indeed. Well, it had the desired effect for many, many months, so it got forgotten. The new status bar behavior induced a lot of stuff like this. The official solution, AFAICT, won't work for non-storyboard projects, either (since they don't have top bottom layout guides). -- Rick signature.asc Description: Message signed with OpenPGP using GPGMail ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Presenting modal vc repositions root vc
On Mon, Jan 27, 2014, at 03:01 PM, Rick Mann wrote: On Jan 27, 2014, at 14:57 , David Duncan david.dun...@apple.com wrote: Basically a view or view controller should never modify their external coordinate system, and this does that. There are a great many places where a parent view controller or window assume they have full control over the views of their children, and doing stuff like this breaks that control pretty handidly. Indeed. Well, it had the desired effect for many, many months, so it got forgotten. The new status bar behavior induced a lot of stuff like this. The official solution, AFAICT, won't work for non-storyboard projects, either (since they don't have top bottom layout guides). Layout guides work just fine regardless of use of storyboards. But because layout guides are owned by the _view controller_, not the view, there is nowhere for IB to offer them in non-storyboard views. You can still use them in an override of -updateViewConstraints just fine. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Presenting modal vc repositions root vc
On Jan 27, 2014, at 15:31 , Kyle Sluder k...@ksluder.com wrote: Layout guides work just fine regardless of use of storyboards. But because layout guides are owned by the _view controller_, not the view, there is nowhere for IB to offer them in non-storyboard views. Well, since a NIB can be owned by a view controller, it seems to me that IB could provide layout guide widgets when that's the case. -- Rick signature.asc Description: Message signed with OpenPGP using GPGMail ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Presenting modal vc repositions root vc
On Mon, Jan 27, 2014, at 03:39 PM, Rick Mann wrote: On Jan 27, 2014, at 15:31 , Kyle Sluder k...@ksluder.com wrote: Layout guides work just fine regardless of use of storyboards. But because layout guides are owned by the _view controller_, not the view, there is nowhere for IB to offer them in non-storyboard views. Well, since a NIB can be owned by a view controller, it seems to me that IB could provide layout guide widgets when that's the case. Storyboard object graphs are much more restricted than NIB object graphs. The relationship between view controllers and their views is much more concrete within a storyboard. NIBs are much more flexible—you can specify the _class_ of File's Owner, but that object does not exist in the NIB at design time. Therefore the constraint object can't be encoded into the nib. Labeling File's Owner as a UIViewController also implies absolutely nothing about the relationship between the view controller and the view—the view controller might manually load the NIB with itself as File's Owner for purposes other than assigning its own view. These difficulties are theoretically surmountable and you should file an enhancement request asking Apple to do so. But as it stands, the only way to use the layout guides for views loaded from NIBs is in code. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Presenting modal vc repositions root vc
I can't figure this out. I've got a view hierarchy that's been working fine. I added a modal, full-screen tutorial to my storyboard that's triggered on a segue from a button in a popover-contained table view. That works fine, too. Now I'm trying to display the same tutorial the first time the user runs the app. I get it from the root view controller's storyboard, and call -[self presentViewController:animated:completion:] on it. Just before presenting it, I see my entire view hierarchy shrink down (to what might be portrait width in landscape mode; it's a landscape-only app). Elements inside a smaller, too, not just repositioned. After the modal VC is dismissed, you see the shrunken view, then it snaps back to full size, but the UIBarButtonItems stay shrunken. Why is this happening? Why does Apple not test anything any more? -- Rick signature.asc Description: Message signed with OpenPGP using GPGMail ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Presenting modal vc repositions root vc
On Jan 25, 2014, at 4:37 PM, Rick Mann rm...@latencyzero.com wrote: Why is this happening? Why does Apple not test anything any more? You have provided no code and no evidence that you are complying with all view and view controller containment requirements. Please stop accusing other parties of negligence before you perform your own due diligence. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
