Bug 16976 - UIScrollView in pure Auto Layout mode sets ContentSize and break constraints
Summary: UIScrollView in pure Auto Layout mode sets ContentSize and break constraints
Alias: None
Product: iOS
Classification: Xamarin
Component: Xamarin.iOS.dll ()
Version: 7.0.6.x
Hardware: PC Windows
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2013-12-27 13:47 UTC by softlion
Modified: 2013-12-28 09:03 UTC (History)
0 users

Is this bug a regression?: ---
Last known good build:

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Description softlion 2013-12-27 13:47:00 UTC
i've tryed to implement a UIScrollView in pure auto layout mode, using the ios tech note and a very well explained blog (which was using objective c). 

blog: http://codehappily.wordpress.com/2013/11/14/ios-how-to-use-uiscrollview-with-autolayout-pure-autolayout-approach-multiple-smaller-views/

apple technote: https://developer.apple.com/library/ios/technotes/tn2154/_index.html

Whatever i do, this constraint is always added and breaks autolayout by forcing the ContentSize instead of letting the ContentSize be driven by the autolayout.

"<_UIScrollViewAutomaticContentSizeConstraint:0x14269d00 Ac.Touch.Views.ConnectionsScrollView:0x140adb70.contentWidth == 0.000000>"

I now think it is a bug in monotouch.

See my post on stackoverflow: http://stackoverflow.com/questions/20784653/uiscrollview-with-autolayout-pure-approach

I used the same appearance hierarchy and constraints, but i keep having the error 'Unable to simultaneously satisfy constraints'. The problem relies in the 'Container View' whose constraints can not be set to 0 right/bottom spaces of the scrollview without triggering the error. But if these constraints are removed, the 'Container View' has no width/height and the scrollview does't scroll.
Comment 1 softlion 2013-12-28 09:03:46 UTC
I've created a new scrollview in pure autolayout mode and it works ok.

So i'll check again back into my 2 others examples to see what is really wrong.