Open Radar

 
Summary:
In Auto Layout by Example chapter of Auto Layout Guide there is a following sample code, describing animations handling in iOS:

[containerView layoutSubtreeIfNeeded]; // Ensures that all pending layout operations have been completed
[UIView animateWithDuration:1.0 animations:^{
     // Make all constraint changes here
     [containerView layoutSubtreeIfNeeded]; // Forces the layout of the subtree animation block and then captures all of the frame changes
}];

and OS X:

[containterView layoutIfNeeded];
NSAnimationContext runAnimationGroup:^(NSAnimationContext *context) {
     [context setAllowsImplicitAnimation: YES];
     // Make all constraint changes here
     [containerView layoutIfNeeded];
}];

Howewer, methods order is wrong: layoutSubtreeIfNeeded is not available in iOS and should be used in OS X sample and layoutIfNeeded should be used in iOS sample instead of OS X.

Steps to Reproduce:
N/A

Expected Results:
N/A

Actual Results:
N/A

Regression:
N/A

Notes:
https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/AutolayoutPG/AutoLayoutbyExample/AutoLayoutbyExample.html