How can I change the view when rotating the iphone (change nib's).
But it should only happens in one single tab!
I tried it with:
- (void)viewDidLoad {
LandscapeViewController *viewController = [[LandscapeViewController alloc]
initWithNibName:#"LandscapeView" bundle:nil];
self.landscapeViewController = viewController;
[viewController release];
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(orientationChanged:)
name:UIDeviceOrientationDidChangeNotification object:nil]; }
- (void)orientationChanged:(NSNotification *)notification
{
[self performSelector:#selector(updateLandscapeView) withObject:nil afterDelay:0];
}
- (void)updateLandscapeView
{
UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation;
if (UIDeviceOrientationIsLandscape(deviceOrientation) && !isShowingLandscapeView)
{
[self presentModalViewController:self.landscapeViewController animated:YES];
isShowingLandscapeView = YES;
}
else if (deviceOrientation == UIDeviceOrientationPortrait && isShowingLandscapeView)
{
[self dismissModalViewControllerAnimated:YES];
isShowingLandscapeView = NO;
}
}
But then the Landscape-View appears in all Tabs. (When this code is loaded once).
Any idea?
What's happening is your view controller is receiving the UIDeviceOrientationDidChangeNotification notification whenever the rotation changes, whether or not it is being displayed. Instead try using the built-in methods of UIViewController that are meant for responding to rotations.
http://tinyurl.com/ycb8of2
This is from Apple's Docs (View Controller Programming Guide):
Tab Bar Controllers and View Rotation
Tab bar controllers support a portrait
orientation by default and do not
rotate to a landscape orientation
unless all of the root view
controllers support such an
orientation. When a device orientation
change occurs, the tab bar controller
queries its array of view controllers.
If any one of them does not support
the orientation, the tab bar
controller does not change its
orientation.
So, I'm not sure that the Tab Bar Controller is designed to rotate just for a single view.
Tanks for your comments!
I found a workaround:
//Remove Observer if not in Landscape
- (void)viewDidDisappear:(BOOL)animated {
if (isShowingLandscapeView == NO) {
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIDeviceOrientationDidChangeNotification object:nil];
}
}
//Add Observer if not in Landscape
- (void)viewDidAppear:(BOOL)animated {
if (isShowingLandscapeView == NO) {
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(orientationChanged:) name:UIDeviceOrientationDidChangeNotification object:nil];
}
}
Related
In my application i have 3 view controllers each is navigating by a button click. In my first view controller i have added the command
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(Orientchanged:) name:UIDeviceOrientationDidChangeNotification object:nil];
it works only on my first UIViewController which is added in appdelegate. But it donot work for other UIViewControllers and call the selector event. What is the reason? Should I add other view controllers to appdelagate.
An example of the code in the Orientchanged: method:
- (void)Orientchanged:(NSNotification *)notification
{
UIDeviceOrientation devOrientation = [UIDevice currentDevice].orientation;
scrollWidth_L = 1024;
scrollWidth_P = 768;
}
Add these methods:
- (BOOL)shouldAutorotate {
return YES;
}
- (NSUInteger)supportedInterfaceOrientations {
return UIInterfaceOrientationMaskAll;
}
-(void)viewWillLayoutSubviews{
[super viewWillLayoutSubviews];
UIInterfaceOrientation devOrientation = self.interfaceOrientation;
CGFloat scrollWidth_L = self.view.bounds.size.width;
CGFloat scrollWidth_P = self.view.bounds.size.height;
if (UIInterfaceOrientationLandscapeLeft == devOrientation || UIInterfaceOrientationLandscapeRight == devOrientation) {
// Code for landscape setup
} else {
// Code for portrait setup
}
}
You have added an observer for the specific viewController. You will have to add in all other viewControllers for knowing the current visible viewController orientation changed.
If you want to know globally then add observer in appDelegate.
Note : Don't forget to remove observer when not needed.
EDIT : Observer depends on where it contains. Here in your case addObserver:self , self is your first view controller.
I have an interface that I want to startup in landscape orientation. After startup when the user rotates the device to portrait I am displaying a day view calendar. When returning to landscape orientation the calendar is dismissed. Everything works great in every orientation with my application user interface displaying properly in landscape orientation and the calendar displaying properly in portrait orientation.
The problem is if the user is holding the iPhone in landscape orientation on startup. No matter what I do I cannot get it to startup with my user interface in landscape mode. My UIDeviceOrientationDidChangeNotification method fires twice, the first time [UIDevice currentDevice].orientation is landscape, the second in it is portrait. The end result is the the user interface rotates to portrait mode and displays the day view. Not what I want. I want the user interface to stay in landscape orientation until the user physically rotates the device from landscape to portrait.
I don't understand why it fires with a landscape [UIDevice currentDevice].orientation when the user is holding the device in portrait orientation.
Here is what my code looks like in the viewController...
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
if ((interfaceOrientation == UIDeviceOrientationPortrait)|| (interfaceOrientation == UIDeviceOrientationPortraitUpsideDown)) {
return NO;
}
return YES;
}
- (void)viewDidLoad {
[super viewDidLoad];
showingCalendar = NO;
initializing=YES;
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(didRotate:)
name:UIDeviceOrientationDidChangeNotification
object:nil];
}
-(void)didRotate:(NSNotification *)notification {
UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation;
if ((deviceOrientation == UIDeviceOrientationPortrait) || (deviceOrientation == UIDeviceOrientationPortraitUpsideDown)) {
if ((!showingCalendar) && (!initializing)) {
showingCalendar = YES;
[[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait animated:YES];
GCCalendarPortraitView *calendar = [[[GCCalendarPortraitView alloc] init] autorelease];
navigationController = [[UINavigationController alloc] initWithRootViewController:calendar];
[self presentModalViewController:navigationController animated:YES];
}
}else if ((deviceOrientation == UIDeviceOrientationLandscapeRight) || (deviceOrientation == UIDeviceOrientationLandscapeLeft)) {
if (showingCalendar) {
showingCalendar = NO;
if (deviceOrientation == UIDeviceOrientationLandscapeRight){
[self dismissModalViewControllerAnimated:YES];
}else if (deviceOrientation == UIDeviceOrientationLandscapeLeft){
[self dismissModalViewControllerAnimated:YES];
}
}else {
initializing = NO;
}
}
}
I found a workaround to my problem. In viewDidLoad I started a scheduledTimerWithTimeInterval and moved beginGeneratingDeviceOrientationNotifications to the selector method.
Now the notification never fires more than once. The user gets landscape at startup no matter which way the device is being held and after startup all the rotations work perfectly.
Here is my modified code. Everything else stayed the same...
- (void)viewDidLoad {
[super viewDidLoad];
showingCalendar = NO;
initializing=YES;
timer = [NSTimer scheduledTimerWithTimeInterval:.55 target:self selector:#selector(startOrientationNotifications) userInfo:nil repeats: NO];
}
-(void)startOrientationNotifications {
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(didRotate:)
name:UIDeviceOrientationDidChangeNotification
object:nil];
}
i wouldn't generate a beginGeneratingDeviceOrientationNotifications,
a simple way could be to use a BOOL to check when portrait is allowed in
shouldAutorotateToInterfaceOrientation
something like this:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
if ((interfaceOrientation == UIDeviceOrientationPortrait)|| (interfaceOrientation == UIDeviceOrientationPortraitUpsideDown)) {
return portraitIsAllowed;
}
return YES;
}
then just change it when needed in other methods .
And keep in mind that shouldAutorotateToInterfaceOrientation is called every time user rotate device AND also when you load (instantiate) your controller the first time
What would be the correct way to achieve an effect similar to the one in the standard iPod app of the iPhone - when the device is rotated to landscape mode, the view changes to cover flow, but the type of transition is fade and not the rotating screen?
This is how I am loading the modal view:
- (void) willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
if (UIInterfaceOrientationIsLandscape(toInterfaceOrientation)) {
carouselView.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:carouselView animated:YES];
}
}
Thanks!
Andrius
I later found that it is more stable to use this solution:
In the parent view controller (in my case it is tab view controller) viewdidload method add this:
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(didRotate:) name:#"UIDeviceOrientationDidChangeNotification" object:nil];
and then add this method:
- (void) didRotate:(NSNotification *)notification {
UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
if (UIInterfaceOrientationIsLandscape(orientation) && !self.modalViewController) {
[self presentModalViewController:carouselView animated:YES];
[Globals sharedGlobals].startedAtLandscape = YES;
}
if (UIInterfaceOrientationIsPortrait(orientation) && self.modalViewController) {
[self dismissModalViewControllerAnimated:YES];
[Globals sharedGlobals].startedAtLandscape = NO;
}
}
And finally if you want to prevent the rotation animation, modify this method like this:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if(UIInterfaceOrientationIsLandscape(interfaceOrientation)) {
return NO;
}
return YES;
}
I am developing a iphone/ipad app.
Problem is that when i change the orientation of ipad portrait to Landscape, back button of navigation controller stops working.
It"s work fine when orientation not changed.
i am using this code
- (BOOL) isPad{
#ifdef UI_USER_INTERFACE_IDIOM
return (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad);
#else
return NO;
#endif
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
if ([self isPad]) {
return YES;
}
else
{
return UIInterfaceOrientationIsPortrait(interfaceOrientation);
}
}
What"s the wrong with this code?
This will work :
-(void)viewWillAppear:(BOOL)animated
{
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(receivedRotate:) name:UIDeviceOrientationDidChangeNotification object:nil];
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
}
-(void)viewWillDisappear:(BOOL)animated
{
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIDeviceOrientationDidChangeNotification object:nil];
}
Now implement the following method :
-(void)checkOrientation
{
UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
if (orientation == UIDeviceOrientationLandscapeLeft||orientation==UIDeviceOrientationLandscapeRight)
{
// Set x coorinate of views you want to change
}
else
{
// Set x coordinates of views to initial x xoordinates.
}
}
Create recievedRotate :
- (void)receivedRotate:(NSNotification *)notification
{
[self checkOrientation];
}
In viewDidLoad :
-(void)viewDidLoad
{
// Code
[self checkOrientation];
}
My guess is that your button is out of the view's frame and thus won't receive touch events. I think something is wrong with the way your app redraws on orientation change.
I had a table populated with rows and each row contain image, title and a button.
When user change the orientation of the iPad button should be rearrange according to the orientation of iPad. Please advice me how to rearrange the object in uitableview cell.
Thanks in advance.
This will work :
-(void)viewWillAppear:(BOOL)animated
{
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(receivedRotate:) name:UIDeviceOrientationDidChangeNotification object:nil];
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
}
-(void)viewWillDisappear:(BOOL)animated
{
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIDeviceOrientationDidChangeNotification object:nil];
}
Now implement the following method :
-(void)checkOrientation
{
UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
if (orientation == UIDeviceOrientationLandscapeLeft||orientation==UIDeviceOrientationLandscapeRight)
{
[tblView reloadData];
// Set x coorinate of views you want to change
}
else
{
[tblView reloadData];
// Set x coordinates of views to initial x xoordinates.
}
}
Create recievedRotate :
- (void)receivedRotate:(NSNotification *)notification
{
[self checkOrientation];
}
In viewDidLoad :
-(void)viewDidLoad
{
[self checkOrientation];
}