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From "Juan Miguel (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CB-13387) ios11 scroll whitespace after click
Date Wed, 04 Oct 2017 08:34:01 GMT

     [ https://issues.apache.org/jira/browse/CB-13387?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Juan Miguel updated CB-13387:
-----------------------------
    Attachment: index.html

> ios11 scroll whitespace after click
> -----------------------------------
>
>                 Key: CB-13387
>                 URL: https://issues.apache.org/jira/browse/CB-13387
>             Project: Apache Cordova
>          Issue Type: Bug
>          Components: cordova-ios
>    Affects Versions: cordova-ios@4.4.0, cordova-ios@4.3.1, cordova-ios@4.5.1, cordova-ios
4.5.0
>         Environment: I'm facing this issue testing with xCode 9 in iOS 11 (simulator
and device), every device model, using cordova-ios from 3.8.0 to 4.5.1. I have this issue
in many projects, but I create a new one without any plugins just for testing it, and it reproduces
in a simple environment.
> From what I have tested, i think it only happens when using new meta viewport-fit=cover
at html file.
>            Reporter: Juan Miguel
>            Assignee: Suraj Pindoria
>              Labels: ios11, statusbar, xcode9
>         Attachments: config.xml, index.html, ios11_error.png
>
>
> When you have dynamic content in your app, it shows correctly at first moment after insert/show
it, but when some click event is dispatched (and an event listener is attached) the scroll
element goes down leaving an empty zone, where the elements were previously. If no event listener
is attached, this issue doesn't happen. If the content is not added dynamically, the scroll
starts in wrong position.
> I have been testing lot of things, and the problem is that after that brokener-click,
the scrolls remain in scrollTop position -44, which should be impossible (and if programatically
you try to go to this position, it goes to 0 position)
> I have made an image showing the issue, sorry for it's appearance, but I think it shows
clearly what happens:
> !ios11_error.png|width=100%!
> As the image shows, it leaves a white space equal to the 'safe-zone' of the statusbar,
in iPhone X are 44px, other iPhones 20px. 
> h2. Steps to reproduce
> # Create a new project 
> {code:none}
> cordova create ios11_error com.test Test
> {code}
> # Configure config.xml for disabling overscoll (I attach my configured [^config.xml],
but you just need to add the next code under iOS platform):
> {code:xml}
> <preference name="DisallowOverscroll" value="true" />
> {code}
> # Replace www/index.html with the attached here [^index.html]
> # Create ios platform
> {code:none}
> cordova platform add ios
> {code}
> # Add launch images for the device you want to use (if you are going to test in iPhone
X, it is not included yet by default with cordova; with other models it is not neccesary)
> # Launch application in your device or simulator. 
> When launched, everything looks fine and in right place, you can scroll and everything
keep where it should. But if you make a tap where there is a click listener, the scroll element
'goes down' and you can scroll to this 'overzone', and the top scrolls goes to negative position
and keeps there (-44px in iPhone X, -20px in other devices; which is the statusbar size).
> It doesn't matter if you make a click in an element and doesn't make anything in that
listener (blue header), or even if that listener only has prevents calls (red square in left
down corner), scroll breaks. If you tap in green square, right down corner, doing a hide/show
put the view again in right position.
> If a click is made in a zone without a listener, anything happens and everything keeps
in right place.



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