onLayout works differently in iPhone and iPad simulators

[anttitakalahti]

This might be an issue with the xCode but I am getting strange values for Dimensions.get('window'). In iPhone simulator it works as expected and shows the new values for height and width but using iPad simulator (iPad Air 2 and iPad Pro) I get the old height and width. This results in broken views as I try to fit the login screen to full page using margin for status bar and calculating the height of the keyboard.

[radko93]

This was also reported here #7340. I'm going to test this on iOS now.

[radko93]

I've made a little research and it seems to be a iOS behaviour (bug). Made an empty app and with this code:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [[NSNotificationCenter defaultCenter] 
         addObserver: self 
         selector: @selector(deviceOrientationDidChange:) 
         name: UIDeviceOrientationDidChangeNotification object: nil];

    return YES;
}

- (void)deviceOrientationDidChange:(NSNotification *)notification {
    // using this statusBarOrientation since code in RN repo is depreciated in iOS8
    NSLog(@"%ld", (long)[[UIApplication sharedApplication] statusBarOrientation]);
}

From my tests:

• iPhone is fine
• iPad:

2016-05-11 14:50:28.498 Playground iOS[66600:4777507] 1 // on startup
2016-05-11 14:50:33.097 Playground iOS[66600:4777507] 1 // after screen rotation from portrait to landscape
2016-05-11 14:50:42.946 Playground iOS[66600:4777507] 3 // back from landscape to initial portrait orientation
2016-05-11 14:50:44.542 Playground iOS[66600:4777507] 1 // back from landscape

So it seems the first orientation change is not being set properly.

Tested on XCode 7.3, iPhone and iPad both simulators.

[ghuh]

Note that, for #7340, I tested this on a physical iPhone 6s and a physical iPad Air 2 and got the same behavior so this is not just a simulator issue.

[mkonicek]

Hi there! This issue is being closed because it has been inactive for a while.

But don't worry, it will live on with ProductPains! Check out its new home: https://productpains.com/post/react-native/onlayout-works-differently-in-iphone-and-ipad-simulators

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Also, if this issue is a bug, please consider sending a pull request with a fix.