I have a universal application created in storyboard mode. It is set-up to automatically rotate to the current orientation. When the iPad is rotated, it should go through the following code BUT all I get is a black screen.
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
[super willRotateToInterfaceOrientation:toInterfaceOrientation duration:duration];
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
if (toInterfaceOrientation == UIInterfaceOrientationLandscapeRight) {
self.view = landscape;
self.view.transform = CGAffineTransformMakeRotation(deg2rad*(90));
self.view.bounds = CGRectMake(0.0, 0.0, 1024.0, 748.0);
} else if (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft) {
self.view = landscape;
self.view.transform = CGAffineTransformMakeRotation(deg2rad*(-90));
self.view.bounds = CGRectMake(0.0, 0.0, 1024.0, 748.0);
} else {
self.view = portrait;
self.view.transform = CGAffineTransformMakeRotation(0);
self.view.bounds = CGRectMake(0.0, 0.0, 768.0, 1004.0);
}
} else {
}
}
Why are all these problems arising here? What is going on and how can I fix this?
EDIT: Debug Console Result of: po [landscape recursiveDescription]
I end up with this response: Can't print the description of a Nil object
EDIT: Black Screen still appears even though the UIViews are linked to their outlets.
Your landscape variable is nil. That's why you are getting a black screen. You need to set it to a UIView.
Related
i am doing one application.In that i used the below code to stop the override the status bar in my view
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7)
{
self.window.clipsToBounds = YES;
[[UIApplication sharedApplication] setStatusBarStyle: UIStatusBarStyleBlackOpaque];
UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
if(orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight)
{
self.window.frame = CGRectMake(20, 20,self.window.frame.size.width-20,self.window.frame.size.height);
self.window.bounds = CGRectMake(20, 0, self.window.frame.size.width, self.window.frame.size.height);
} else
{
self.window.frame = CGRectMake(0,20,self.window.frame.size.width,self.window.frame.size.height-20);
self.window.bounds = CGRectMake(0, 20, self.window.frame.size.width, self.window.frame.size.height);
}
}
But if i do this i am getting the black transparent bar at the bottom of the view in simulator.But in device i am getting black color.And it is correctly working in ios6,only problem i ios 7 like below.
I ran your code in a demo with default navigation bar and found same black stuff coming. So made some changes and below is working one -
if(orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight)
{
self.window.frame = CGRectMake(0, 0,self.window.frame.size.width,self.window.frame.size.height);
self.window.bounds = CGRectMake(0, 0, self.window.frame.size.width, self.window.frame.size.height);
} else
{
self.window.frame = CGRectMake(0,0,self.window.frame.size.width,self.window.frame.size.height);
self.window.bounds = CGRectMake(0, 0, self.window.frame.size.width, self.window.frame.size.height);
}
You could give it a ran and let me know if anything come's up.
I'm developing an app using iOS 7 and storyboards. I have several view controllers. What I want to do is change the status bar color according to the Navigation bar color. But each viewcontroller has a different color navigation bar. I know I can change the status bar colour by adding a flag to info.plist and code like this:
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7)
{
self.window.clipsToBounds = YES;
[[UIApplication sharedApplication] setStatusBarStyle: UIStatusBarStyleBlackOpaque];
UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
if(orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight)
{
self.window.frame = CGRectMake(20, 0,self.window.frame.size.width-20,self.window.frame.size.height);
self.window.bounds = CGRectMake(20, 0, self.window.frame.size.width, self.window.frame.size.height);
} else
{
self.window.frame = CGRectMake(0,20,self.window.frame.size.width,self.window.frame.size.height-20);
self.window.bounds = CGRectMake(0, 20, self.window.frame.size.width, self.window.frame.size.height);
}
}
But how do I change the color for each ViewController?
Add this method to each viewCOntroller
- (UIStatusBarStyle)preferredStatusBarStyle
{
return UIStatusBarStyleDefault; // or UIStatusBarStyleLightContent
}
In viewDidLoad for each view controller:
[self preferredStatusBarStyle];
[self performSelector:#selector(setNeedsStatusBarAppearanceUpdate)];
Also in project properties you need to set to YES this option: View controller-based status bar appearance
I'm currently developing an iPad application that is using ZBarSDK for reading QR Codes.
I am using ZBarReaderView (NOT UIViewController), so i'm showing the front facing camera in a UIView that is drawn using CGRect (see code below).
My problem is that the camera comes up on it's side within the view. The iPad app will ONLY be developed to work in Landscape mode.
When the UIView comes up now, the image is on it's side and i'm not sure how to fix it. I tried using CGAffineTransform which successfully changes the angle somewhat but how will this handle if the iPad is flipped the other way?
I saw some other posts about this similar issue but no resolution that has worked for me. Worth noting i'm using IOS6 and please remember i'm using ZBarReaderView, so the supportedOrientationsMask is NOT available.
I want the user to see the camera view in the upright position regardless of whether landscape is left or right. Right now though, regardless of which way it is turned, the video is sideways (so I can see myself at 90 degrees to the side). The UIView doesn't change at all when the screen is turned either. I'm a bit lost.
Code:
- (void) viewDidAppear: (BOOL) animated {
ZBarReaderView * readerView = [ZBarReaderView new];
ZBarImageScanner * scanner = [ZBarImageScanner new];
[scanner setSymbology: ZBAR_I25
config: ZBAR_CFG_ENABLE
to: 0];
[readerView initWithImageScanner:scanner];
readerView.readerDelegate = self;
readerView.tracksSymbols = YES;
readerView.frame = CGRectMake(20,220,230,230);
readerView.torchMode = 0;
readerView.device = [self frontFacingCameraIfAvailable];
[readerView start];
[self.view addSubview: readerView];
}
-(void)relocateReaderPopover:(UIInterfaceOrientation)toInterfaceOrientation {
if (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft) {
readerView.previewTransform = CGAffineTransformMakeRotation(M_PI_2);
} else if (toInterfaceOrientation == UIInterfaceOrientationLandscapeRight) {
readerView.previewTransform = CGAffineTransformMakeRotation(-M_PI_2);
} else if (toInterfaceOrientation== UIInterfaceOrientationPortraitUpsideDown) {
readerView.previewTransform = CGAffineTransformMakeRotation(M_PI);
} else {
readerView.previewTransform = CGAffineTransformIdentity;
}
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if (interfaceOrientation == UIInterfaceOrientationLandscapeLeft) {
return YES;
} else if (interfaceOrientation == UIInterfaceOrientationLandscapeRight) {
return YES;
} else {
return NO;
}
}
- (void) willRotateToInterfaceOrientation: (UIInterfaceOrientation) orient
duration: (NSTimeInterval) duration
{
if (orient == UIInterfaceOrientationLandscapeLeft) {
[readerView willRotateToInterfaceOrientation: orient
duration: duration];
}
if (orient == UIInterfaceOrientationLandscapeRight) {
[readerView willRotateToInterfaceOrientation: orient
duration: duration];
}
}
- (BOOL)shouldAutorotate {
UIInterfaceOrientation orientation = [[UIDevice currentDevice] orientation];
if (orientation == UIInterfaceOrientationLandscapeLeft) {
return YES;
} else if (orientation == UIInterfaceOrientationLandscapeRight) {
return YES;
} else {
return NO;
}
}
-(NSUInteger) supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskLandscape;
}
I got the same issue and resolved it symply !
I just needed to call :
[reader willRotateToInterfaceOrientation: toInterfaceOrientation duration: duration];
within the willRotate... of the view controller that contains the ZbarReaderView.
Okay I got the orientation working now. No idea why it works now but here's the end code for the readerView part:
readerView = [ZBarReaderView new];
ZBarImageScanner * scanner = [ZBarImageScanner new];
[scanner setSymbology: ZBAR_I25
config: ZBAR_CFG_ENABLE
to: 0];
[readerView initWithImageScanner:scanner];
readerView.readerDelegate = self;
readerView.tracksSymbols = YES;
readerView.frame = CGRectMake(20,220,230,230);
readerView.torchMode = 0;
readerView.device = [self frontFacingCameraIfAvailable];
[self relocateReaderPopover:[self interfaceOrientation]];
[readerView start];
[self.view addSubview: readerView];
Notice the only real difference there is this line:
ZBarReaderView * readerView = [ZBarReaderView new];
Changing that line has fixed the initial orientation issue. No idea why but it did. Now I just need to fix the rotation stuff for if the user rotates the iPad.
This worked fine for me:
// ADD: present a barcode reader that scans from the camera feed
ZBarReaderViewController *reader = [ZBarReaderViewController new];
reader.readerDelegate = self;
//reader.supportedOrientationsMask = ZBarOrientationMaskAll;
ScanOverlay *overlayController = [[ScanOverlay alloc] initWithNibName:#"ScanOverlay" bundle:nil];
reader.cameraOverlayView = overlayController.view;
ZBarImageScanner *scanner = reader.scanner;
// TODO: (optional) additional reader configuration here
reader.supportedOrientationsMask = ZBarOrientationMask(UIInterfaceOrientationLandscapeRight||UIInterfaceOrientationLandscapeLeft);
reader.wantsFullScreenLayout = YES;
reader.showsZBarControls = NO; //If we don't set this to NO, the overlay may not display at all
reader.tracksSymbols = YES;
//To support Landscape orientation
UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
if (UIDeviceOrientationLandscapeLeft == orientation) {
//Rotate 90
reader.cameraViewTransform = CGAffineTransformMakeRotation (3*M_PI/2.0);
} else if (UIDeviceOrientationLandscapeRight == orientation) {
//Rotate 270
reader.cameraViewTransform = CGAffineTransformMakeRotation (M_PI/2.0);
}
I have an app which starts with a root UINavigationController. This controller then pushes and pops various other UIViewControllers - that all works fine.
My app has a custom graphic for the navigationController.navigationBar.backgroundImage. There is one image for the iPhone platform. There are two images for the iPad platform - one for portrait, one for landscape. The iPad is the platform of issue as it rotates, the iPhone platform is portrait only.
I had already written code in -(void)willRotateToInterfaceOrientation: to detect the rotation, and set the navigationBar.backgroundImage to the correct orientation graphic, if the platform is iPad.
In the iPad 5.0 simulator - it works fine; rotating the iPad on screen results in the correct navigationBar graphic regardless of orientation.
On the device - it doesn't work - The graphic appears correctly on iPad device launch in portrait. When I rotate to landscape, the navigationBar changes to a standard grey one. When I rotate back the grey 'sticks'.
I have tried calling setNeedsDisplay - no change.
I have tried setting navigationBar.tintColor = [UIColor clearColor] - no change.
I have checked the filenames of the graphics in the code are identical to the actual filenames - they are.
Code for rotation:
-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
return YES; }
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
if (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft || toInterfaceOrientation == UIInterfaceOrientationLandscapeRight) {
UIImage *titleImage = [UIImage imageNamed:#"StandardHeaderIpadLandscape"];
self.navigationController.navigationBar.tintColor = [UIColor clearColor];
[self.navigationController.navigationBar setBackgroundImage:titleImage forBarMetrics:UIBarMetricsDefault];
self.navigationController.view.backgroundColor = [[UIColor alloc] initWithPatternImage:[UIImage imageNamed:#"StandardBackgroundiPadLandscape.png"]];
[self.navigationController.navigationBar setNeedsDisplay];
} else {
UIImage *titleImage = [UIImage imageNamed:#"StandardHeaderIpadPortrait"];
self.navigationController.navigationBar.tintColor = [UIColor clearColor];
[self.navigationController.navigationBar setBackgroundImage:titleImage forBarMetrics:UIBarMetricsDefault];
self.navigationController.view.backgroundColor = [[UIColor alloc] initWithPatternImage:[UIImage imageNamed:#"StandardBackgroundiPad.png"]];
[self.navigationController.navigationBar setNeedsDisplay];
}
}
}
Check whether titleImage is nil. I have a feeling that your image paths are not correct, or those images are not correctly copied to iPad.
I have two images:
Help-Portrait.png (320 x 480)
Help-Landscape.png (480 x 320)
When a user clicks the help button on any view, they need to be presented with the correct image, which should also rotate when the device does. I have tried adding the imageView to both the window, and the navigation controller view.
For some reason I am having issues with this.
Could anyone shed light on what I am doing wrong?
UIImage *image = nil;
CGRect frame;
if (UIInterfaceOrientationIsPortrait([[UIApplication sharedApplication] statusBarOrientation])) {
image = [UIImage imageNamed:#"Help-Portrait.png"];
frame = CGRectMake(0, 0, 320, 480);
} else {
image = [UIImage imageNamed:#"Help-Landscape.png"];
frame = CGRectMake(0, 0, 480, 320);
}
if (!helpImageView) {
helpImageView = [[UIImageView alloc] initWithFrame:frame];
helpImageView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
helpImageView.image = image;
}
[[UIApplication sharedApplication] setStatusBarHidden:YES];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(helpImageTapped:)];
helpImageView.userInteractionEnabled = YES;
[helpImageView addGestureRecognizer:tap];
[self.view addSubview:helpImageView];
[tap release];
willRotateToInterfaceOrientation:
if(helpImageView) {
[(id)[UIApplication sharedApplication] setStatusBarHidden:NO animated:YES];
if (UIInterfaceOrientationIsPortrait(toInterfaceOrientation)) {
helpImageView.image = [UIImage imageNamed:#"Help-Portrait.png"];
} else {
helpImageView.image = [UIImage imageNamed:#"Help-Landscape.png"];
}
}
When you rotate the device the image and the frame don't change, and you end up with two thirds of the portrait image displayed on the left part of the screen.
What I want is it for it to show the correct image for the orientation, the right way up. Also I would like animation for the image rotation, but thats a side issue
The place where you need to adjust your button image is in your ViewController's shouldAutorotateToInterfaceOrientation method (documentation linked for you).
Do something like:
- (BOOL)shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation)interfaceOrientation
{
UIImage *image = NULL;
if (UIInterfaceOrientationIsPortrait(interfaceOrientation))
{
image = [UIImage imageNamed:#"Help-Portrait.png"];
} else {
image = [UIImage imageNamed:#"Help-Landscape.png"];
}
[yourButton setImage: image forState: UIControlStateNormal]
return YES;
}
Michael Dautermann's answer looks to have almost all the answer, but I'm opposed to using shouldAutorotateToInterfaceOrientation. This method is designed only to determine if a rotation should or should not occur, nothing else.
You should use either didRotateFromInterfaceOrientation: willAnimateRotationToInterfaceOrientation:duration instead.
didRotateFromInterfaceOrientation: - interfaceOrientation is already set on your UIViewController so you can get the current orientation. In this case the rotation animation is already complete.
willAnimateRotationToInterfaceOrientation:duration - The benefit of this method is execution time. You are inside the rotation animation so you won't have the less than pretty effects which happens when you change UI either after the rotation animation completes.
Got it working, with this code:
- (void)showHelpImage {
NSString *imageName = #"Help_Portrait.png";
CGRect imageFrame = CGRectMake(0, 0, 320, 480);
helpImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:imageName]];
helpImageView.frame = imageFrame;
[self.view addSubview:helpImageView];
[self updateHelpImageForOrientation:self.interfaceOrientation];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(helpImageTapped:)];
helpImageView.userInteractionEnabled = YES;
[helpImageView addGestureRecognizer:tap];
[self.view addSubview:helpImageView];
[tap release];
}
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
[self updateHelpImageForOrientation:toInterfaceOrientation];
}
- (void)updateHelpImageForOrientation:(UIInterfaceOrientation)orientation {
NSString *imageName = nil;
CGRect imageFrame = helpImageView.frame;
if (orientation == UIInterfaceOrientationPortrait || orientation == UIInterfaceOrientationPortraitUpsideDown) {
imageName = #"Help_Portrait.png";
imageFrame = CGRectMake( 0, 0, 320, 480);
} else if (orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight) {
imageName = #"Help_Landscape.png";
imageFrame = CGRectMake( 0, 0, 480, 320);
}
helpImageView.image = [UIImage imageNamed:imageName];
helpImageView.frame = imageFrame;
}
Got the idea from:
http://www.dobervich.com/2010/10/22/fade-out-default-ipad-app-image-with-proper-orientation/