Is it possible to support all orientations yet once the view is loaded in the launched orientation disallow the user from then rotating orientation? So say we have a loading screen which is launched in portrait, we want to disable any rotation on this screen. Same goes for if the app is launched in landscape, then we want to disallow rotation to portrait.
you need to subclass 'UINavigationController', implement shouldAutorotate and use your navigation controller class in your storyboard.
override the shouldAutorotate method on the initial view controller. This method is called before performing any autorotation. If it returns NO, then the rotation is suppressed.
- (BOOL)shouldAutorotate{
id currentViewController = self.topViewController;
if ([currentViewController isKindOfClass:[DetailViewController class]])
return NO;
return YES;}
good luck
Related
I used this code for forcing my Home screen (first screen of my application) be portrait while other screens remain supporting all orientations:
public class RltNavigationController : UINavigationController
{
public RltNavigationController () : base ()
{
}
public override UIInterfaceOrientationMask GetSupportedInterfaceOrientations ()
{
if(this.TopViewController is HomeScreen )
return UIInterfaceOrientationMask.Portrait ;
else
return UIInterfaceOrientationMask.AllButUpsideDown ;
}
public override bool ShouldAutorotateToInterfaceOrientation (UIInterfaceOrientation toInterfaceOrientation)
{
// Return true for supported orientations
if(this.TopViewController is HomeScreen )
return (toInterfaceOrientation == UIInterfaceOrientation.Portrait );
else
return (toInterfaceOrientation != UIInterfaceOrientation.PortraitUpsideDown) ;
}
}
Now, suppose that the device is on the landscape orientation at home screen (Device is lanscape but screen just show portrait). Now if user go to other views, other views now show portrait while it should show landscape. What solution I can choose in order to load second views with theirs actual rotation?
EDIT
Thanks for all answers, Just notice that already the problem is not that I can not force the screen to be portrait. For understanding the problem please follow the scenario:
-> First screen forced to be portrait.
-> Device is landscape right and I'm in home screen(so home screen show portrait)
-> Now I switch to another screen that support all orientation
-> at another screen because the parent screen was portrait it show portrait (while because device is landscape it should show landscape)
You can also directly select from the XIB a particular viewController be Landscape or Portrait and the same loads.
You can not explicitly say, viewController be landscape and the view will be landscape. The way it works is, you ask the controller that is controller the screen, this may be a navigation controller, tab view controller, a modal, how they want to be able to rotate. If you have a navigation controller then all viewController will only have the rotation of your navigation controller.
There were a few tricks like subclassing the navigation controller and over the should auto rotate method, call [self.visibleViewController shouldAutoRotate]; which works for making screens rotate and not rotate, but if you have only 1 screen that supports all orientations and all the others do not, then you have a pushing/popping error where if you push or pop while in that different orientation the next viewController will be in that orientation.
Since you can't directly tell the rootViewController to explicitly rotate, the next best solutions are,
A: Use QuartzCore to manually rotate the view yourself
B: have a separate xib file for each orientation so when you rotate to landscape you see the landscape viewController and vice versa
The easiest way to do this is to create a custom navigation controller (subclass of UINavigationController) that inherits its rotation based on the currently visible view controller
Inside your custom navigation controller:
-(NSUInteger) supportedInterfaceOrientations {
return UIInterfaceOrientationMaskAllButUpsideDown;
}
-(BOOL) shouldAutorotate {
return self.topViewController.shouldAutorotate;
}
Then inside any of the view controllers within that, add these methods:
-(BOOL)shouldAutorotate{
return NO;
}
-(NSUInteger)supportedInterfaceOrientations{
return UIInterfaceOrientationMaskPortrait;
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{
return UIInterfaceOrientationPortrait;
}
That's for a view you DON'T want to autorotate. Modify that accordingly for views you do want to rotate.
Make sure your project settings have rotation in the orientations you want enabled, and make sure to use your custom navigation controller instead of the regular one for any view hierarchies that contain multiple possible rotations.
Note that you may run into problems if a view that is rotated is popped and the previous view is not rotatable. Off the top of my head, I'm not sure whether this will work properly.
I ma trying to lock screen orientation to only landscape orientation when a certain image is still visible, then when the image is hidden, unlock all orientations (targeting iOS 6):
-(BOOL)shouldAutorotate{
if (self.splashImageView.hidden == NO) {
return UIInterfaceOrientationMaskPortrait;//gets called when image is visible
}else{
return UIInterfaceOrientationMaskAll;//gets called when image is hidden
}
}
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
[self shouldAutorotate];
}
As you may notice, shouldAutorotate is called properly but the screen is always supporting landscape orientation even when the image is still visible, is there something missing?
P.S: Please note I am trying to get that to work on a tabbar view controller (a UIViewController subclass).
In your appdelegate you have those two methods.but do you have setting like in your project settings -> go to summary tab and see if orientation is set to only landscape or all.Just try to set those.
I am working on an ios app that must work in both landscape and portrait, except one view, that should be always in landscape. So, I have:
-(BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
{
return (toInterfaceOrientation == UIInterfaceOrientationLandscapeRight) || (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft);
}
If I lunch my application in landscape mode, and get to this view and rotate the device (iPad), this method is called and return false, so the interface doesn't rotate, good stuff.
BUT if I am in portrait and get to this view, this method is called and return a false, however the orientation doesn't change. In this context, if I rotate the device to landscape, the method return a true and the interface rotate properly and if I tried to rotate again to portrait, this method return false and the interface remains in landscape.
How can I achieve that the first time I get to this view, if the device is in portrait, the interface change to landscape?
Also, I tried with
- (NSUInteger)supportedInterfaceOrientations
but it never get called.
Thanks in advance!
shouldAutorotateToInterfaceOrientation: is depreciated in iOS 6.0. Override the supportedInterfaceOrientations and preferredInterfaceOrientationForPresentation methods instead.
From the docs on preferredInterfaceOrientationForPresentation
If your view controller implements this method, then when presented,
its view is shown in the preferred orientation (although it can later
be rotated to another supported rotation). If you do not implement
this method, the system presents the view controller using the current
orientation of the status bar.
My root view controller's implementation of supportedInterfaceOrientations almost always returns UIInterfaceOrientationMaskAll, however there is one edge case where it returns UIInterfaceOrientationMaskLandscape.
This is working, if the user rotates the device. However if the device is being held in portrait mode the supportedInterfaceOrientations method does not ever get called, unless the user manually rotates the device.
How can I programatically tell the system that the return value of this method has changed?
According to the documentation, it seems like I should be able to call [UIViewController attemptRotationToDeviceOrientation] however this does not have any effect (supportedInterfaceOrientations is never called and the screen does not rotate).
I found various workarounds others have posted to try and solve this problem, but none of them work in my tests. I suspect they may have worked in iOS 5.0, but not iOS 6.0.
I am returning YES in the root view controller's shouldAutorotate method.
First of all, it might be useful if you used this if you want to present your UIViewController in Landscape mode.
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return UIInterfaceOrientationLandscapeLeft | UIInterfaceOrientationLandscapeRight;
}
Also, A lot depends on with which controller is your UIViewController embedded in.
Eg, If its inside UINavigationController, then you might need to subclass that UINavigationController to override orientation methods like this.
subclassed UINavigationController (the top viewcontroller of the hierarchy will take control of the orientation.) needs to be set it as self.window.rootViewController.
- (BOOL)shouldAutorotate
{
return self.topViewController.shouldAutorotate;
}
- (NSUInteger)supportedInterfaceOrientations
{
return self.topViewController.supportedInterfaceOrientations;
}
From iOS 6, it is given that UINavigationController won't ask its UIVIewControllers for orientation support. Hence we would need to subclass it.
Note :
The shouldAutorotate and supportedInterfaceOrientations method always get called for UINavigationController whenever Push operations are done.
Quote from Apple's UIViewController Class Reference:
Note: At launch time, apps should always set up their interface in a portrait orientation. After the application:didFinishLaunchingWithOptions: method returns, the app uses the view controller rotation mechanism described above to rotate the views to the appropriate orientation prior to showing the window.
http://developer.apple.com/library/ios/#documentation/uikit/reference/UIViewController_Class/Reference/Reference.html
If the interface starts in portrait the autorotation should be able to handle the adjustment even if the user opens the app with the device on its side.
Update: I found this post that should help with rotations after launch. Apparently iOS 6 looks at the navigation controller to determine supported device orientations.
How to force a UIViewController to Portrait orientation in iOS 6
You need to manually rotate it. You'll want to call the following logic in your view controller's viewWillAppear: method:
UIDeviceOrientation curDevOrientation = [[UIDevice currentDevice] orientation];
if (![self supportsOrientation:curDevOrientation]) {
// We're going to rotate 90 degrees clockwise. First figure out what that
// means to the status bar.
UIInterfaceOrientation newStatusBarOrientation;
switch (curDevOrientation) {
case UIDeviceOrientationPortrait:
newStatusBarOrientation = UIInterfaceOrientationLandscapeRight;
break;
case UIDeviceOrientationPortraitUpsideDown:
newStatusBarOrientation = UIInterfaceOrientationLandscapeLeft;
break;
}
[[UIApplication sharedApplication] setStatusBarOrientation:newStatusBarOrientation animated:NO];
// Now rotate the view 90 degrees clockwise.
CGAffineTransform transform = CGAffineTransformMakeRotation(M_PI * 90.0 / 180.0);
self.view.transform = transform;
}
That should rotate the particular view controller's view, whenever it appears.
I've created a view controller and set the orientation of the view to Landscape in XCode 4.2 (Interface Builder). However, when I add the view, the view is displayed in Portrait orientation. I've overriden ShouldAutorotateToInterfaceOrientation in all view controllers to return true, and I've attempted to rotate the view manually using the following code:
this.View.Transform.Rotate (3.14f * .5f);
I have also tried to set the frame to a landscape frame (i.e. 480 X 320), though the frame of the view is already set correctly.
Just to clarify, the vast majority of my views are in Portrait. I would like to load the landscape view in a landscape orientation, irrespective of what orientation the device is actually in. Is this possible? If so, what am I missing?
Thanks in advance for any assistance on this matter!
UPDATE: I'm noticing that ShouldAutorotateToInterfaceOrientation is only called once when the view is loaded. It is not called when the device is rotated. Is this normal behavior?
ShouldAutorotateToInterfaceOrientation is called every time the device orientation changes.
public override bool ShouldAutorotateToInterfaceOrientation (UIInterfaceOrientation toInterfaceOrientation)
{
Console.Out.WriteLine(toInterfaceOrientation.ToString());
// Return true for supported orientations
// This particular screen is landscape only!
return (toInterfaceOrientation == UIInterfaceOrientation.LandscapeLeft || toInterfaceOrientation == UIInterfaceOrientation.LandscapeRight);
}
this code will only allow the view to orient itself in either landscapeleft or landscaperight mode, and writes the new device orientation to the console every time.
when you load the view, and push it onto (for instance) a UINavigationController however, it's still in portrait mode (and ShouldAutorotateToInterfaceOrientation is not called.)
From Objective-C, it's fairly easy to force a device orientation, but in MonoTouch, there appears to be no direct mapping.
the solution ;
Send a message to the objective-c runtime, specifying which orientation we want.
you can easily do this by adding the following to a view controller:
Selector orientationSetter;
private void SetOrientation (UIInterfaceOrientation toOrientation)
{
if (orientationSetter == null)
{
orientationSetter = new Selector ("setOrientation:");
}
Messaging.void_objc_msgSend_int (UIDevice.CurrentDevice.Handle,
orientationSetter.Handle, (int)toOrientation);
}
you can now manually change the orientation of the entire device.
What's more, is that if you use a UINavigationController, the orientation will return back to normal once this view is popped off the stack.
I think that for the Landscape view that you always want to display in Landscape Orientation, you need to return False within ShouldAutorotateToInterfaceOrientation or remove the override altogether. This will prevent the view from auto-rotating when the device is in portrait mode.