Was trying to change several labels and images width depend on the screen bounds after device gets rotated. Here's what I've tried:
- (void)viewDidLayoutSubviews{
if( UIInterfaceOrientationIsLandscape( [[UIDevice currentDevice] orientation] )) {
CGSize newSize;
newSize = CGSizeMake([[UIScreen mainScreen] bounds].size.width,[[UIScreen mainScreen] bounds].size.height);
NSLog(#"%#",NSStringFromCGSize(newSize));
}else if (UIInterfaceOrientationIsPortrait( [[UIDevice currentDevice] orientation] )){
CGSize newSize;
newSize = CGSizeMake([[UIScreen mainScreen] bounds].size.width,[[UIScreen mainScreen] bounds].size.height);
NSLog(#"%#",NSStringFromCGSize(newSize));
}
}
It's supposed to log different width and height when I change the orientation
(like on iphone5 : {480,320} & {320,480})
works fine on ios8,
but I got the same size results testing both on ios7 simulator and ios7 device.
Any idea would be appreciated.
Only from iOS8
[UIScreen mainScreen].bounds
is interface-oriented (look at session "View Controller Advancements in iOS 8" of WWDC 2014), this means that in landscape mode on iOS8 height and width are reversed.
You can create an helper method like below to have the same behavior:
+(CGRect)getScreenBounds
{
CGRect bounds = [UIScreen mainScreen].bounds;
if (([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0) && UIInterfaceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation)) {
bounds.size = CGSizeMake(bounds.size.height, bounds.size.width);
}
return bounds;
}
I have the strangest thing - I'm using phonegap/cordova 3.3 - ios
Every time I use a plugin that is using the display, e.g. camera, video, scanner,
the window display shrinks and a white line appear in the bottom of the screen.
If I uses the plugin several times (e.g. take a few photo) the window is just keep getting smaller and smaller.
It happens both with phonegap 2.9, and 3.3, only in ios.
I had the same problem, with the exact same issue.
Here is how I went about solving it (and now it works):
I reverted back the viewWillAppear function/method as it was before:
- (void)viewWillAppear:(BOOL)animated
{
// View defaults to full size. If you want to customize the view's size, or its subviews (e.g. webView),
// you can do so here.
//Lower screen 20px on ios 7
/*
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7) {
CGRect viewBounds = [self.webView bounds];
viewBounds.origin.y = 20;
viewBounds.size.height = viewBounds.size.height - 20;
self.webView.frame = viewBounds;
}
*/
[super viewWillAppear:animated];
}
and instead went on changing a different function, viewDidLoad, to the following:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7) {
CGRect viewBounds = [self.webView bounds];
viewBounds.origin.y = 20;
viewBounds.size.height = viewBounds.size.height - 20;
self.webView.frame = viewBounds;
}
self.view.backgroundColor = [UIColor blackColor];
}
The difference here is, that the viewDidLoad will be executed only once (what you actually want), while viewWillAppear is executed EVERY time this view is shown/presented to the user.
I hope this helps.
This is caused by another issue I was trying to solve, here is the original issue: iOS 7 status bar overlapping UI
The solution was to change viewWillAppear as follow (in MainViewController.m)
// ios 7 status bar fix
- (void)viewWillAppear:(BOOL)animated
{
// View defaults to full size. If you want to customize the view's size, or its subviews (e.g. webView),
// you can do so here.
//Lower screen 20px on ios 7
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7) {
if(self.webView.frame.origin.y == 0) {
CGRect viewBounds = [self.webView bounds];
viewBounds.origin.y = 20;
viewBounds.size.height = viewBounds.size.height - 20;
self.webView.frame = viewBounds;
}
}
[super viewWillAppear:animated];
}
I'm trying to programmatically determine the current height and width of my application. I use this:
CGRect screenRect = [[UIScreen mainScreen] bounds];
But this yields a width of 320 and a height of 480, regardless of whether the device is in portrait or landscape orientation. How can I determine the current width and height (i.e. dependent upon the device orientation) of my main screen?
You can use something like UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation) to determine the orientation and then use the dimensions accordingly.
HOWEVER, during an orientation change like in UIViewController's
- (void) willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
duration:(NSTimeInterval)duration
Use the orientation passed in toInterfaceOrientation since the UIApplication's statusBarOrientation will still point to the old orientation as it has not yet changed (since you're inside a will event handler).
Summary
There are several related posts to this, but each of them seem to indicate that you have to:
Look at [[UIScreen mainScreen] bounds] to get the dimensions,
Check what orientation you are in, and
Account for the status bar height (if shown)
Links
Iphone: Get current view dimensions or screen dimensions
IPhone/IPad: How to get screen width programmatically?
Objective C - how to get current screen resolution?
“Incorrect” frame / window size after re-orientation in iPhone or iPad
iPhone Dev SDK - get screen width
Working Code
I usually don't go this far, but you piqued my interest. The following code should do the trick. I wrote a Category on UIApplication. I added class methods for getting the currentSize or the size in a given orientation, which is what you would call in UIViewController's willRotateToInterfaceOrientation:duration:.
#interface UIApplication (AppDimensions)
+(CGSize) currentSize;
+(CGSize) sizeInOrientation:(UIInterfaceOrientation)orientation;
#end
#implementation UIApplication (AppDimensions)
+(CGSize) currentSize
{
return [UIApplication sizeInOrientation:[UIApplication sharedApplication].statusBarOrientation];
}
+(CGSize) sizeInOrientation:(UIInterfaceOrientation)orientation
{
CGSize size = [UIScreen mainScreen].bounds.size;
UIApplication *application = [UIApplication sharedApplication];
if (UIInterfaceOrientationIsLandscape(orientation))
{
size = CGSizeMake(size.height, size.width);
}
if (application.statusBarHidden == NO)
{
size.height -= MIN(application.statusBarFrame.size.width, application.statusBarFrame.size.height);
}
return size;
}
#end
To use the code simple call [UIApplication currentSize]. Also, I ran the above code, so I know it works and reports back the correct responses in all orientations. Note that I factor in the status bar. Interestingly I had to subtract the MIN of the status bar's height and width.
Other thoughts
You could go about getting the dimensions by looking at the UIWindow's rootViewController property. I've looked at this in the past and it similarly reports the same dimensions in both portrait and landscape except it reports having a rotate transform:
(gdb) po [[[[UIApplication sharedApplication] keyWindow]
rootViewController] view]
<UILayoutContainerView: 0xf7296f0; frame =
(0 0; 320 480); transform = [0, -1, 1, 0, 0, 0]; autoresize = W+H;
layer = <CALayer: 0xf729b80>>
(gdb) po [[[[UIApplication
sharedApplication] keyWindow] rootViewController] view]
<UILayoutContainerView: 0xf7296f0; frame = (0 0; 320 480); autoresize
= W+H; layer = <CALayer: 0xf729b80>>
Not sure how your app works, but if you aren't using a navigation controller of some kind, you could have a UIView under your main view with the max height / width of parent and grows / shrinks with parent. Then you could do: [[[[[[[UIApplication sharedApplication] keyWindow] rootViewController] view] subviews] objectAtIndex:0] frame]. That looks pretty intense on one line, but you get the idea.
However, it would still be better to do the above 3 steps under the summary. Start messing with UIWindows and you'll find out weird stuff, like showing a UIAlertView will change UIApplication's keywindow to point at a new UIWindow that the UIAlertView created. Who knew? I did after finding a bug relying on keyWindow and discovering that it changed like that!
This is my solution code !This method can add to NSObject class's Categroy , or you can define a Top custom UIViewController class , and let all of your other UIViewControllers to inherit it .
-(CGRect)currentScreenBoundsDependOnOrientation
{
CGRect screenBounds = [UIScreen mainScreen].bounds ;
CGFloat width = CGRectGetWidth(screenBounds) ;
CGFloat height = CGRectGetHeight(screenBounds) ;
UIInterfaceOrientation interfaceOrientation = [UIApplication sharedApplication].statusBarOrientation;
if(UIInterfaceOrientationIsPortrait(interfaceOrientation)){
screenBounds.size = CGSizeMake(width, height);
}else if(UIInterfaceOrientationIsLandscape(interfaceOrientation)){
screenBounds.size = CGSizeMake(height, width);
}
return screenBounds ;
}
Note, after IOS8 , as Apple Document of UIScreen's bounds property says :
Discussion
This rectangle is specified in the current coordinate space, which takes into account any interface rotations in effect for the device. Therefore, the value of this property may change when the device rotates between portrait and landscape orientations.
so for the consideration of compatibility , we should detect the IOS version and make the change as below:
#define IsIOS8 (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_7_1)
-(CGRect)currentScreenBoundsDependOnOrientation
{
CGRect screenBounds = [UIScreen mainScreen].bounds ;
if(IsIOS8){
return screenBounds ;
}
CGFloat width = CGRectGetWidth(screenBounds) ;
CGFloat height = CGRectGetHeight(screenBounds) ;
UIInterfaceOrientation interfaceOrientation = [UIApplication sharedApplication].statusBarOrientation;
if(UIInterfaceOrientationIsPortrait(interfaceOrientation)){
screenBounds.size = CGSizeMake(width, height);
}else if(UIInterfaceOrientationIsLandscape(interfaceOrientation)){
screenBounds.size = CGSizeMake(height, width);
}
return screenBounds ;
}
Here's a handy macro:
#define SCREEN_WIDTH (UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation) ? [[UIScreen mainScreen] bounds].size.width : [[UIScreen mainScreen] bounds].size.height)
#define SCREEN_HEIGHT (UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation) ? [[UIScreen mainScreen] bounds].size.height : [[UIScreen mainScreen] bounds].size.width)
In iOS 8+ you should use the viewWillTransitionToSize:withTransitionCoordinator method:
-(void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
[super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
// You can store size in an instance variable for later
currentSize = size;
// This is basically an animation block
[coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context) {
// Get the new orientation if you want
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
// Adjust your views
[self.myView setFrame:CGRectMake(0, 0, size.width, size.height)];
} completion:^(id<UIViewControllerTransitionCoordinatorContext> context) {
// Anything else you need to do at the end
}];
}
This replaces the deprecated animation method that gave no information about size:
-(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)orientation duration:(NSTimeInterval)duration
As of iOS 8 screen bounds are now returned correct for current orientation. This means an iPad in landscape orientation [UIScreen mainScreen].bounds would return 768 on iOS <=7 and 1024 on iOS 8.
The following returns the correct height and width on all versions released.
-(CGRect)currentScreenBoundsDependOnOrientation
{
NSString *reqSysVer = #"8.0";
NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
if ([currSysVer compare:reqSysVer options:NSNumericSearch] != NSOrderedAscending)
return [UIScreen mainScreen].bounds;
CGRect screenBounds = [UIScreen mainScreen].bounds ;
CGFloat width = CGRectGetWidth(screenBounds) ;
CGFloat height = CGRectGetHeight(screenBounds) ;
UIInterfaceOrientation interfaceOrientation = [UIApplication sharedApplication].statusBarOrientation;
if(UIInterfaceOrientationIsPortrait(interfaceOrientation)){
screenBounds.size = CGSizeMake(width, height);
NSLog(#"Portrait Height: %f", screenBounds.size.height);
}else if(UIInterfaceOrientationIsLandscape(interfaceOrientation)){
screenBounds.size = CGSizeMake(height, width);
NSLog(#"Landscape Height: %f", screenBounds.size.height);
}
return screenBounds ;
}
if you want the orientation dependent size and you have a view, you can just use:
view.bounds.size
I wrote category for UIScreen, that works on all iOS versions, so you can use it like this:
[[UIScreen mainScreen] currentScreenSize].
#implementation UIScreen (ScreenSize)
- (CGSize)currentScreenSize {
CGRect screenBounds = [[UIScreen mainScreen] bounds];
CGSize screenSize = screenBounds.size;
if ( NSFoundationVersionNumber <= NSFoundationVersionNumber_iOS_7_1 ) {
UIInterfaceOrientation interfaceOrientation = [[UIApplication sharedApplication] statusBarOrientation];
if ( UIInterfaceOrientationIsLandscape(interfaceOrientation) ) {
screenSize = CGSizeMake(screenSize.height, screenSize.width);
}
}
return screenSize;
}
#end
Here is a Swift way to get orientation dependent screen sizes:
var screenWidth: CGFloat {
if UIInterfaceOrientationIsPortrait(screenOrientation) {
return UIScreen.mainScreen().bounds.size.width
} else {
return UIScreen.mainScreen().bounds.size.height
}
}
var screenHeight: CGFloat {
if UIInterfaceOrientationIsPortrait(screenOrientation) {
return UIScreen.mainScreen().bounds.size.height
} else {
return UIScreen.mainScreen().bounds.size.width
}
}
var screenOrientation: UIInterfaceOrientation {
return UIApplication.sharedApplication().statusBarOrientation
}
These are included as a standard function in a project of mine:
https://github.com/goktugyil/EZSwiftExtensions
float msWidth = [[UIScreen mainScreen] bounds].size.width*(IS_RETINA?2.0f:1.0f);
float msHeight = [[UIScreen mainScreen] bounds].size.height*(IS_RETINA?2.0f:1.0f);
if ( UIInterfaceOrientationIsPortrait(self.interfaceOrientation) ) {
os->setWidth(MIN(msWidth, msHeight));
os->setHeight(MAX(msWidth, msHeight));
} else {
os->setWidth(MAX(msWidth, msHeight));
os->setHeight(MIN(msWidth, msHeight));
}
NSLog(#"screen_w %f", os->getWidth());
NSLog(#"screen_h %f", os->getHeight());
However, on iOS 8.0.2:
+ (NSUInteger)currentWindowWidth
{
NSInteger width = 0;
UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
CGSize size = [UIScreen mainScreen].bounds.size;
// if (UIInterfaceOrientationIsLandscape(orientation)) {
// width = size.height;
// } else {
width = size.width;
// }
return width;
}
use -> setNeedsDisplay() for the view you want to resize.
Some improvements on the answers offered here, in Swift:
let interfaceOrientation = UIApplication.shared.statusBarOrientation // (< iOS 13)
let screenSize = UIScreen.main.bounds.size
let screenWidth = interfaceOrientation.isPortrait ? screenSize.width : screenSize.height
let screenHeight = interfaceOrientation.isPortrait ? screenSize.height : screenSize.width
I'm using the following code to get the screen size width:
CGFloat width = [UIScreen mainScreen].bounds.size.width - 100;
But its giving width as "668.0" in portrait as well as landscape.
How can I get different width depending on the orientation of the device.
I ran into the same problem as you and all I could find is checking the orientation and calculate the height and width as follow:
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
screenHeight = orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight ? 748 : 1004;
screenWidth = orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight ? 1024 : 768;
These size are for the the iPad obvioulsy but it could work for iPhone with the right dimensions.
Personally I think it's a bit poor but I couldn't find anything else.
Ok. In that case we can use,
CGRect viewFrame = self.view.frame;
int width = viewFrame.size.width;
int height = viewFrame.size.height;
CGSize winSize = [[CCDirector sharedDirector] winSize];
winSize.width will give you width and winSize.height give you height.
I have a bug in a Universal iOS app that does not display the camera view in the iPad frame. The view is offset to the left. The view sits perfectly in an iPhone, but not on iPad. The original code was written 2 years ago and I am wondering if there has been a change in iOS that is now missing from this section of code.
Here is what I have at the moment;
self.preview = [AVCaptureVideoPreviewLayer layerWithSession:self.session];
AVCaptureConnection *avcc = [self.preview connection];
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
[avcc setVideoOrientation:AVCaptureVideoOrientationLandscapeRight];
else
[avcc setVideoOrientation:AVCaptureVideoOrientationLandscapeRight];
CGRect rect = [[[self view] layer] bounds];
[self.preview setBounds:CGRectMake(0, 0, rect.size.height, rect.size.width)];
[self.preview setPosition:CGPointMake(CGRectGetMidY(rect), CGRectGetMidX(rect))];
self.preview.videoGravity = AVLayerVideoGravityResizeAspectFill;
As per the problem , what I can suggest just add this line in viewDidLayoutSubviews() if your project support Auto Layout .
Code:-
{
CGRect bounds=self.view.layer.bounds;
self.preview.videoGravity = AVLayerVideoGravityResizeAspectFill;
self.preview.bounds=bounds;
self.preview.position=CGPointMake(CGRectGetMidX(bounds), CGRectGetMidY(bounds));
}