ios-autolayout

This question is strictly about iOS9+ Say you have an ordinary modern app (autolayout, storyboard, universal) which does allow all four rotation positions you want it to autorotate in the normal way, so it will change to your new constraint-based layouts when user rotates device from landscape to portrait But you simply want NO animation during the user rotating the device. You want it to just "click" to the new sideways or upright layout. The only way I have been able to achieve this is by adding: override func viewWillTransitionToSize(size:CGSize, withTransitionCoordinator coordinator

This error is logged to the console when some part of the code is changing UI items from other threads than the main thread. But how can I find where it does this? Main problem with "This application is modifying the autolayout engine from a background thread" is that it seem to be logged a long time after the actual problem occurs, this can make it very hard to troubleshoot. I managed to solve the issue by creating three symbolic breakpoints. Debug > Breakpoints > Create Symbolic Breakpoint... Breakpoint 1: Symbol: -[UIView setNeedsLayout] Condition: !(BOOL)[NSThread isMainThread] Breakpoint

It appears that the Autoresizing of views is no longer reliably working when building for iOS11 with XCode 9. The layout of several views end up with the positioning of controls as they are in the XIB, but the appropriate resizing has not happened. This has been working fine in iOS10, and works with our old app running in iOS11. However, rebuilding the app the positioning and sizing fails. Has something changed that impacts the use of autoresizingmask ? Is there a way to automatically convert from AutoResizing to AutoLayout and Constraints ? Edit: The controls that are giving trouble are the

Update I have revised the question completely after my latest findings. Goal My goal is to implement the following effect: There is a simple table view The user selects a row The selected row expands, revealing another label below the original one Please note that I am aware, that this can be achieved by inserting/deleting cells below the selected one, I already have a successful implementation using that method . This time, I want to try to achieve this using Auto Layout constraints. Current status I have a sample project available for anyone to check , and also opened an issue . To summarize