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    <p>You can use something like <code>UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation)</code> to determine the orientation and then use the dimensions accordingly.</p> <p>HOWEVER, during an orientation change like in UIViewController's </p> <pre><code>- (void) willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration </code></pre> <p>Use the orientation passed in <code>toInterfaceOrientation</code> since the UIApplication's statusBarOrientation will still point to the old orientation as it has not yet changed (since you're inside a <code>will</code> event handler).</p> <p><strong>Summary</strong></p> <p>There are several related posts to this, but each of them seem to indicate that you have to:</p> <ol> <li>Look at <code>[[UIScreen mainScreen] bounds]</code> to get the dimensions, </li> <li>Check what orientation you are in, and </li> <li>Account for the status bar height (if shown)</li> </ol> <p><strong>Links</strong></p> <ul> <li><a href="https://stackoverflow.com/q/4614284/590956">Iphone: Get current view dimensions or screen dimensions</a></li> <li><a href="https://stackoverflow.com/q/3655104/590956">IPhone/IPad: How to get screen width programmatically?</a></li> <li><a href="https://stackoverflow.com/q/1868677/590956">Objective C - how to get current screen resolution?</a></li> <li><a href="https://stackoverflow.com/q/2686882/590956">“Incorrect” frame / window size after re-orientation in iPhone or iPad</a></li> <li><a href="http://www.iphonedevsdk.com/forum/iphone-sdk-development/5793-get-screen-width.html" rel="nofollow noreferrer">iPhone Dev SDK - get screen width</a></li> </ul> <p><strong>Working Code</strong></p> <p>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 <code>willRotateToInterfaceOrientation:duration:</code>.</p> <pre><code>@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 </code></pre> <p>To use the code simple call <code>[UIApplication currentSize]</code>. 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.</p> <p>Hope this helps. :D</p> <p><strong>Other thoughts</strong></p> <p>You could go about getting the dimensions by looking at the UIWindow's <code>rootViewController</code> 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:</p> <blockquote> <p><strong>(gdb)</strong> po [[[[UIApplication sharedApplication] keyWindow] rootViewController] view]</p> <p>&lt;UILayoutContainerView: 0xf7296f0; frame = (0 0; 320 480); transform = [0, -1, 1, 0, 0, 0]; autoresize = W+H; layer = &lt;CALayer: 0xf729b80&gt;&gt;</p> <p><strong>(gdb)</strong> po [[[[UIApplication sharedApplication] keyWindow] rootViewController] view]</p> <p>&lt;UILayoutContainerView: 0xf7296f0; frame = (0 0; 320 480); autoresize = W+H; layer = &lt;CALayer: 0xf729b80&gt;&gt;</p> </blockquote> <p>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: <code>[[[[[[[UIApplication sharedApplication] keyWindow] rootViewController] view] subviews] objectAtIndex:0] frame]</code>. That looks pretty intense on one line, but you get the idea.</p> <p>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!</p>
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    1. POHow to get orientation-dependent height and width of the screen?
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    1. COThis seems like such an elementary task that I'm having trouble believing I have to hack my own code to determine something like this.
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    2. COI'll try another solution and repost if it works. This site is so aggressive if you don't answer quickly you might as well not answer at all. haha... :D I hope my answer is at least helpful. Again, I'll try something else out real quick.
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    3. COthanks, I appreciate it. I've noticed that iPhone questions related to non-standard ways of doing things usually go unanswered, so there's probably no hurry.
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