Bug 24355 - ScrollView content can become stuck on orientation change (iOS)
Summary: ScrollView content can become stuck on orientation change (iOS)
Status: RESOLVED FIXED
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 1.3.0
Hardware: PC Mac OS
: Normal normal
Target Milestone: ---
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2014-11-07 16:36 UTC by falz.x1
Modified: 2015-01-14 13:43 UTC (History)
5 users (show)

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

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Status:
RESOLVED FIXED

Description falz.x1 2014-11-07 16:36:36 UTC
The issue seems to occur when the following is true and only in iOS:

The content in the ScrollView cannot be scrolled (because it can be fully displayed) while in the vertical (portrait) orientation.

The content in the ScrollView can be scrolled (because it cannot be fully displayed) while in the horizontal (landscape) orientation.

When these conditions are true, the following steps will reproduce the issue:

Rotate to the horizontal position.
Scroll the content of the ScrollView all the way to the bottom.
Rotate back to the vertical position.
The content is now stuck scrolled half way up the page and cannot be scrolled down.
I have created the solution below to allow the issue to be easily reproduced following the steps above:

https://github.com/afalz/ScrollViewIssue
Comment 1 Ram Chandra 2014-11-10 07:24:41 UTC
I have checked this issue and with the help of steps mentioned in bug description I am able to reproduce this issue.

When I change the orientation of device to landscape mode and scroll the scrollview to the bottom and change the orientation to the portrait mode, scroll view stuck half way up the page and we cannot scroll down the scroll view.

Screencast: http://www.screencast.com/t/FkMu8pFdx0b

Environment Info:

Xamarin.Forms: 1.2.3.6257

=== Xamarin Studio ===

Version 5.5.3 (build 6)
Installation UUID: 6ea47b0d-1852-4aaf-808d-373ff0a5002b
Runtime:
	Mono 3.10.0 ((detached/e204655)
	GTK+ 2.24.23 (Raleigh theme)

	Package version: 310000023

=== Apple Developer Tools ===

Xcode 6.1 (6604)
Build 6A1052d

=== Xamarin.Mac ===

Version: 1.9.0.608 (Trial Edition)

=== Xamarin.Android ===

Version: 4.18.0 (Trial Edition)
Android SDK: /Users/jatin66/Desktop/Backup/android-sdk-macosx
	Supported Android versions:
		1.6    (API level 4)
		2.1    (API level 7)
		2.2    (API level 8)
		2.3    (API level 10)
		3.0    (API level 11)
		3.1    (API level 12)
		3.2    (API level 13)
		4.0    (API level 14)
		4.0.3  (API level 15)
		4.1    (API level 16)
		4.2    (API level 17)
		4.3    (API level 18)
		4.4    (API level 19)
		4.4.87 (API level 20)
Java SDK: /usr
java version "1.7.0_65"
Java(TM) SE Runtime Environment (build 1.7.0_65-b17)
Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode)

=== Xamarin.iOS ===

Version: 8.4.0.15 (Trial Edition)
Hash: 08968c4
Branch: 
Build date: 2014-10-20 21:48:06-0400

=== Build Information ===

Release ID: 505030006
Git revision: fbe3e9453daf6a3bb9a9709ed22bec35f7c9056b
Build date: 2014-10-23 13:08:38-04
Xamarin addins: e44add2b39de4dd57c0742bb2e620dfad84c64c6

=== Operating System ===

Mac OS X 10.10.0
Darwin Jatin66s-iMac.local 14.0.0 Darwin Kernel Version 14.0.0
    Fri Sep 19 00:26:44 PDT 2014
    root:xnu-2782.1.97~2/RELEASE_X86_64 x86_64
Comment 2 dango 2014-11-11 15:45:31 UTC
The inverse is also true.  The scrollview works fine in portrait orientation (and fits so it doesn't scroll) but when rotating to landscape scrolling is not enabled so the view is clipped and the user can't scroll.
Comment 3 falz.x1 2014-11-11 17:51:43 UTC
I've also recently discovered this issue doesn't seem to occur in ios7 only ios8 - not sure if this helps in finding a resolution.
Comment 4 Jason Smith [MSFT] 2015-01-14 13:43:53 UTC
Fixed in 1.3.2-pre1