I have a split view controller, as the master view I have a UIViewController. That UIViewController has a toolbar and a tableview inside it.
If I rotate the the split view to portrait and then back to landscape I see a space above the tableview that is transparent. When I scroll the tableview up a little I see the table contents appear in that space.
Whats weird is that it only happens when I rotate the device and then rotate back again. The table view is fine at first but something seems to get messed up after a couple of rotations.
Here is a screenshot of it after I rotate a few times:
Here is a screenshot before the rotation (looks great):
I have tried to force it to re layout with setNeedsLayout, but no luck.
Any clue???
Try setting self.automaticallyAdjustsScrollViewInsets = NO; in viewDidLoad of ViewController. This will be YES by default.
Related
Recently I ran into an issue with my app when changing the device's orientation.
This is my main ViewController (let's call it VC1) in portrait mode:
Now if you push / present any viewcontroller (let's call that VC2), rotate the screen while in VC2, and return back to the previous view (VC1), this is what I get:
Why doesn't VC1 rotate correctly like it should? This issue happens throughout the whole app and with any two views. I honestly have no idea what might be causing this or where to look, so any help would be appreciated.
Do you use constraints and autolayout? Can you post a screeen where constraints of the view are visible? I think there are some missing constraints
your navigation bar is properly resize in portrait and landscape mode So The main problem is you didn't add trailing Constraints to your view.
Just Add you trailing constraints on your view in Storyboard.
Have a following structure:
UIViewController (VC) with some UIViews(views) on the top half of screen and UITableView (tableView) on the bottom half of screen. All are on the same hierarchy level within VC's view.
VC is managed by UINavigationController.
Auto-layout is off. Using autoresizing masks.
dataSource and delegate methods are set up and works fine.
What I want to realize:
Hide a navigation bar when scroll up and show in after the scroll down.
What I did:
Since my project supports iOS8+ only, just setting:
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
self.navigationController.hidesBarsOnSwipe = YES;
}
should be fine.
What I have:
Swiping up and down on the views hides and shows navigation bar respectively.
Scrolling tableView makes no sense.
Spent some time on that and found that resizing tableView to make it match to vc's view solves the problem.
Edit:
Is it mentioned somewhere in the docs that table view should be only full screen?
Found interesting thing: even if you didn't set hidesBarsOnTap to YES and try to tap on navigation area (i.e. when it's still hidden after swipe) - navigation bar will show after that. Very annoying if you have any UI elements in that area.
I'm having a really strange behaviour. When my app starts everything is fine: the size of the views on screen are exactly the one specified in the storyboard. But just as I try to push a view controller its contents are scaled, so when I pop back the view is messed up.
Any clues?
First learn about Autolayout. Here is a good way to go
Autolayout
Second I am giving you a trick which may work.
Click on viewController
If you don't want your views to extend their edges to bottom or to the top deselect Under top bars and Under Bottom bars
so basically, for reasons in this answer ive put a UIView inside a webview so that it acts as a header to the view. its works perfectly for ipad, but on iphone when the webview is rotated landscape, the header UIView isnt clickable.
ive tried in the - (void) didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation to explicitly set the userInteraction = true of the header view but this didnt work.
i tried removing it from the superview and adding it back, but to no avail.
i have some debug code that lets me see the class of the view im clicking on, and when i click on the header view i can see its clicking on the scrollview behind it (which is part of the webview). so it just seems to be ignoring the view completely (even though it works in portrait mode, and works in landscape and portrait on ipad).
does anyone know why the click events are going straight though the uiview?
update:
something interesting ive found is that if the webview doesnt resize when the view rotates, then the header is still clickable, so it must be something to do with the resizing of the webview screwing things up
also, the background from the scrollview is like coming through the header view it seems (header = grey, scrollview = yellow) pics here. when rotated back to portrait the grey shows up again and is clickable
Give the scroll view a background color to see where it is. If the button is outside of the scroll view it is still visible (if clipsToBounds is NO, which it is by default) but not clickable.
Find out where the superview of the button is and make the resizing in a way that it is big enough after resizing.
strangest solution, but instead of having the header view autoresize in all directions, i set it like so
something strange must have been happening and making its frame set wrong somehow
I've based my app on Apple's SplitView project type. I have a TableView as the Master, and am using different types of views as the Detail view. To select types of detail view, I'm using the fancy concept of buttons on my DetailView toolbar. When the DetailView is derived from UIViewController, everything is good. When the DetailView derives from UIViewController, but contains a UITableView then I have problems. In portrait view the toolbar is visible. In landscape mode the toolbar is hidden, even though the Tableview is moved down to allow space for it. The UIToolbar and UITableView are both defined in my NIB file which is loaded to create the detail view. Why is my toolbar invisible in landscape?
BTW, is this the best way to choose Detail view types with UISplitView? Bonus question, what if selecting a row in my DetailView tableview should bring up another View, I can't push it like I would with a NaviagtionController, so how do I go back to the detail tableview?
Thanks, Gerry
HI Gerry,
I have faced the same toolbar problem, when trying to rotate the splitView, toolbar will disappear. If you are creating the toolbar in the interface builder, try to set the toolbar properties(size), by selecting the toolbar, then --> Tools -->Size inspector, in the autosizing section, mark the left, right and upper red lines and unmark the bottom red line, then everything will works fine.
-Maria
Bonus question, I would create a UINavigationController in code, set it's rootcontroller to the DetailView tableview (self) and then push the new view on top of it.
When you react to the rotation change are you using the same view or a different one for the detail view? Seems like the new view may not contain an instance of the toolbar? Or the Tableview is covering it up because the landscape view has less vertical room than the portrait view. Are you resetting the height of the tableview to allow space for the toolbar within the 768 height when rotating to landscape?
Just a tip but whenever I run into odd things like this I remove the elements from the NIB file and create them programmatically in code and it usually solves the problem. You get a lot more control over things when you do. Overall as I've gained more experience with programming for iPhone OS I've found that I rarely put much into a NIB file any longer and do almost everything in code now.