I have a controller that manages a UITextView. Normally, in an app that supports multiple interface orientations, I would simply override -shouldAutorotateToInterfaceOrientation:, set the appropriate auto-resizing masks, and go along my merry way. While going along my merry way, if I were to begin editing this UITextField in, say, portrait mode, then rotate the device to a landscape orientation, the keyboard would animate nicely to landscape mode along with the rest of the view. This is what I want.
Now, in this particular app, I have a root view that must only ever be in portrait mode. This is a camera preview view. I also have an overlay-view for the camera-view that I would like to have support all interface orientations. This is where the UITextView is located.
So, as a result of the fixed-orientation root view, I cannot use built in rotation: I have to do this manually. This isn't a problem, I can register for the UIDeviceOrientationDidChangeNotification and manually animate the appropriate rotation and frame adjustment for the overlay view.
That's good enough to get the view positioned correctly, but the keyboard would still only ever show in portrait orientation. Again, I can correct this with UIApplication's -setStatusBarOrientation: every time I get a notification that the device has rotated.
But that's where the problem arises. I would hope that the combination of:
Register for rotation notifications
Manually rotate view
Set status bar orientation (with animation)
would be enough to exactly replicate the automatic rotation behavior. But it falls short in one important way: If the keyboard were to be shown in one orientation, then rotated to another, the keyboard would remain defiantly in the original position, as if -setStatusBarOrientation: were never called. As far as I know, the only thing that affects the keyboard's presentation is the application's status bar orientation, and there is only the one method for setting it. So am I out of luck? Is it really impossible to make the keyboard rotate with a view manually like it does with auto-rotation?
Addendum
In an effort to avoid covering old ground, I've tried the following solutions hacks:
Upon orientation change, resign and immediately become first responder again. This does make the keyboard move to the appropriate orientation, but it does so without animation, and occasionally does really bad things like show a landscape-sized keyboard in portrait and vice-versa.
Upon orientation change just resign first responder. This also has the odd behavior of instantly moving (but not resizing) the keyboard to the new orientation, then dismissing it with animation. It's very ugly and jarring.
One of our apps does this (because we didn't say "no!" loudly enough when presented with the original design) using crazy "orientation stack" code. I remember fixing this problem by disabling orientation when the keyboard is up (ickyyyy).
Instead, consider supporting rotation by "counter-rotating" the camera preview view instead of forcing the VC to portrait-only. If this looks a bit odd, you can do the "nasty hack" version: Add the camera preview view as a subview of the window, under your VC's view, and give your VC's view a transparent background.
Maybe late to the party. I stumbled upon the same problem. Trying to fix it in iOS 6.
Apparently Apple didn't recognize this problem in the meanwhile, otherwise they would've fixed it by now: have the -setStatusBarOrientation: method include other interface elements besides only the status bar as well, or have alternative methods to set the orientation of the keyboard and other elements. A pity they didn't
Disabling orientation rotation when the keyboard is up, is no solution for me, but I found another simple solution hack:
return NO in -(BOOL)shouldAutorotate
return UIInterfaceOrientationMaskAll in -(NSUInteger)supportedInterfaceOrientations
listen for device rotation notifications
Then when you receive such notification:
hide the status bar
when the keyboard is up, dismiss the keyboard ([myTextField resignFirstResponder])
perform manual rotation animation
set the orientation of the statusbar ([sharedApplication setStatusBarOrientation:newOrientation animated:NO])
show the status bar
if the keyboard was visible before, present it again ([myTextField becomeFirstResponder])
The effect is that the status bar and the keyboard gently slide out before the manual rotation animation and gracefully slide back in, when the animation is done.
BTW, I also found this interesting article by Corey Floyd: http://coreyfloyd.tumblr.com/post/8212203583/2-ways-to-rotate
Although his second method: Tricking UIKit, only caused more confusion with me.
Related
My rootViewController is a UITabbarController and contains UINavigationControllers.
In order to restrict rotation, since iOS6, on some but not all views, I have subclassed both of the these controllers to respect the shouldAutorotate response of their topmost or visible view.
This all works just perfectly... most of the time.
In one case, starting from a view (UITableviewController) that does not allow rotation.
I push a view that does allow autorotate, rotate to landscape then back to portrait.
Then when I pop the view, all appears well.
But now if I rotate the device, the status bar alone rotates, leaving a blank space at the top and covering a part of the left side of the current view. The current view does not rotate (as it should not). Only the status bar rotates, back and forth. The view remains responsive, receives touches and works as normal, doesn't resize or respond to rotation in any way (as it should not).
This behavior continues until I kill and restart the app. Once it happens I have found no other way to make it stop. On restart all works properly again and will work properly for an indeterminate duration. I can sit there pushing, popping, rotating back and forth to my hearts content with no issues.
I have never been able to recreate this in simulator.
It happens for no apparent reason, I cannot make it happen. I'd say 85% of the time it works properly. I thought I had it fixed many times when it did not occur for days or even weeks. Then, out of the blue it happens again.
I cannot find a post in any forums which describe this behavior, so I am not finding even a place to start to debug. How could the status bar swing from top to side and the view does not resize or rotate or respond in any way. If I knew how to make that happen, I would have a place to start.
I experienced the same problem when adding a subclassed UIWindow (in my case, a status bar overlay).
The solution was to set the rootViewController of this new UIWindow to a subclassed UIViewController that had -(BOOL)shouldAutorotate implemented. This prevented the status bar from rotating when it wasn't supposed to.
I am coding against iOS 3.0 and I am trying to add rotation (landscape) support to my app.
Everything about the rotation was easy enough. However, after rotation to landscape mode from portrait, the right-third of the screen (480-320) is unresponsive to all events (touches, drag, etc.). I've verified that the key window is receiving the events but those events are not being passed to the buttons and UIViews on the right (in landscape) side of the screen.
I am using NSNotificationCenter to receive orientation changed events (and not using autorotate flag).
I did see: link text but that wasn't very helpful to my case.
Stuck. Need help. Thanks.
I've fixed the problem I was having .. I basically needed to do [self.navigationController.view setNeedsLayout].
The way I understand this (which maybe incorrect is that self.navigationController.view.frame was same as self.view.frame and both were equal to (x=0,y=0,width=320,height=480). I then rotated self.view by M_PI/2 and did a number of frame manipulation on select self.view.subviews to get everything to animate/position/scale correctly.
That worked out okay but the navigation controller was not willing to acknowledge touch events to parts of self.view there were to the right of 320. In essence, if this self.navigationController.view.clipsToBounds were true, it might not even have shown that part of self.view.
Anyway, setting setNeedsLayout on the navigation controller's view resolved the issue. I hope this helps someone else.
I'm building an app that uses a UIView that contains a UIScrollView within it so that when the keyboard shows up, users can still scroll downwards to see the content within the view. It seems like I have gotten everything perfectly set up but when I rotate, everything goes completely unusable. The views are all out of place and I am unsure what's the strategy to handle this. I have the views autoresizing but they don't seem to be doing it correctly.
Should I manually check to see if the rotations have occurred and reset the frame without autoresizing or is there a way that I can accomplish this with auto resizing?
The situation is this:
Portrait mode - form fits fine. When keyboard shows up, scroll view is resized but form does not.
Landscape mode - form doesn't fit fine and when keyboard shows up, scroll view is messed up.
Do I need to resize the form view when rotated to landscape mode?
Thanks!
You can reposition things back to original by using:
-(void)willAnimateFirstHalfOfRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
//reposition code
}
I have an issue where I want the keyboard to resign upon the ipad rotating.
If the keyboard is open in portrait, and I rotate to landscape, the keyboard appears in landscape.
HOW DO I RESIGN the keyboard when I rotate!
TY
I have been spending many frustrating hours trying to get rotations working on the iPhone version of Tunepal.
Firstly, I have a tab bar controller, with a navigation controller controlling each of the views.
I actually only want one of my views to be able to rotate and that is the TuneDisplay.
I have a subclassed the UITabBarController and overridden the shouldAutorotateToInterfaceOrientation:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation) interfaceOrientation {
if (self.selectedViewController != nil)
{
return [self.selectedViewController shouldAutorotateToInterfaceOrientation:interfaceOrientation];
}
else
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
}
In each of the view controllers for each of the tabs I have overridden the method and returned YES for each orientation I want to support. All well and good and everything works as it should. If I try and do a rotation on a tab that doesn’t support the rotation, nothing happens.
The problem occurs if I move from a tab thats rotated to a tab that isnt supposed to support that rotation. The new tab is displayed rotated too! Screenshots for all this are included here:
http://tunepal.wordpress.com/2010/04/20/rotation-woes/
Is there any way I can make it rotate back to portrait on tapping the tab?
I have tried the unsupported setOrientation trick, but firstly it doesnt work correctly and secondly I received a warning from Apple for including it in my last build.
If (as I suspect) there is no way to limit this behavior:
How do I make the microphone image scale when I rotate the device?
How do I make the buttons and the progress bar expand to fit the witdh of the toolbar?
Also, one of the tabs that rotates ok has a table, with a search bar. The first time I rotate to the right or to the left, I get a black bar to the right of the search bar. If I subsequently rotate back and rotate again, the bar disappears! I have enabled the struts and springs things on the search bar in the interface builder and it looks like it should behave correctly.
Any ideas about how to fix this?
Ideas, feedback much appreciated
Bryan
This isn't a full answer. Rotation is seriously inconsistent. You have done the right things. Several aspects don't work in the simulator, so you need to confirm all your testing on a device. Table headers and search bars don't resize to full width in older OS versions, so stick with 3.1.3 or higher.
Commonest problems:
implement the shouldAutorotateToInterfaceOrientation: to return YES;
if you use navigation controllers the root view controller must support the orientation;
if you have a toolbar the view controller for all items must support it;
and same for a tab bar controller.
You may need to turn on orientation notifications to get more useful information out of the device:
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(orientationChanged:)
name:UIDeviceOrientationDidChangeNotification object:nil];
Remember to turn it off and remove yourself from the notifications when you are done; this is supposed to have a high overhead.
Set the view contentMode property for your image to resize; together with autoresizingMask, which you are setting in IB, you should be OK.
Remember also that you can use two different nibs for portrait and landscape modes. There is an example project that sort of does this ("WhichWayIsUp"); see the View Controller Programming Guide also ("Creating an Alternate Landscape Interface").
If the rotation methods are being called, then the UI should be rotated consistently. You will find that they aren't always called when they should be.
It isn't hard to call a rotational transform on your views to force a rotation. It shouldn't be needed, but sometimes that's the only way they will rotate.
view.transform = CGAffineTransformMakeRotation(M_PI * n);
If you get it figured out, let us know.
It sounds like you are handling the rotation correctly while the tab is displayed. However, as you know, there's no quick way to switch rotations. What you will have to do is rotate the view yourself using CGAffineTransform. See this question: Is there a documented way to set the iPhone orientation?
To scale the image, you should be able to click the arrows inside the UIImageView housing the image in Interface Builder. There's a little arrow in the upper right hand corner you can click to see how the view behaves when it's rotated to make sure it scales correctly. But you'd probably be better off not scaling the image and hadling the rotation as in the answer to the linked question.
This is just an example of the basic problem I'm having, so don't worry if this situation sounds a bit pointless ;)
Let's say I have an app that's mainly a UINavigationController just two levels deep. The top level is a table with a list of image filenames, and the second level has just a UIImageView showing the image for the filename you tapped.
For an app such as this, does anyone know a good way to allow the table at the top level to autorotate while keeping the second level of images fixed in portrait mode?
So far I've been able to almost get there... but when I tap a filename while in landscape mode, the image slides into view in the wrong orientation even if the second level view controller's shouldAutorotateToInterfaceOrientation returns yes for only portrait modes.
There was no good way to do this in iPhone OS 2.x, but in 3.0, they've dramatically improved it.
In 2.x, the shouldAutorotateToInterfaceOrientation: delegate method was only obeyed for changes to the orientation, so you'd get the behavior you describe: if it was rotated in another view controller, it would stay rotated through pushes and pops even if the new view controller didn't support rotation to that orientation.
In 3.0, UINavigationController polls shouldAutorotateToInterfaceOrientation: on each push or pop and obeys what it returns the way you'd expect, e.g.: if you're currently rotated in Landscape Left orientation, and you push an instance of a view controller that only supports Portrait orientation via shouldAutorotateToInterfaceOrientation:, it automatically and instantly flips the logical orientation and slides in the new view the correct way in Portrait orientation.
Note that this will only work on applications linked against (and therefore requiring) 3.0. For applications linked against 2.x, it will emulate the old behavior.
The problem is that if you use auto rotation the entire UI (including the UIWindow instance I believe) is rotated.
Anything pushed onto the navigation controller at this point will be done in landscape.
So when you push the imageview, that is exactly what you get.
To get this to work, you have to either:
Handle the rotation of the root view
manually (using a transform)
Unrotate the image view by -PI/2
using a transform.
Either way you have to perform the transforms manually to get this to work.
As a side note, this may be bad UI design. As a user, I would expect as I drill down for images to appear rightside up. But this is without knowing the exact context of your app.