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https://issues.apache.org/jira/browse/FLEX-35383?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16424633#comment-16424633
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OmPrakash Muppirala commented on FLEX-35383:
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The DropDownList was not built with mobile in mind. I have used a Callout
component with a List inside it successfully. Have you tried that?
> DropDownList Issues on Mobile
> -----------------------------
>
> Key: FLEX-35383
> URL: https://issues.apache.org/jira/browse/FLEX-35383
> Project: Apache Flex
> Issue Type: Bug
> Components: Spark: DropDownList
> Affects Versions: Apache Flex 4.16.1
> Environment: Developing in Flash Builder 4.7 on Windows 10 using Flex
> 4.16.1 SDK and AIR 28 for iOS
> Reporter: Bill Spence
> Priority: Major
>
> In Flash Builder 4.7, and designing for mobile iOS apps(paraticularly the
> iPad), the DropDownList behaves erratically. If you tap on the DropDownList
> so that the list opens, and then flick your finger across the list, it
> scrolls just fine.
> The problem arises when you put your finger on the list and then scroll
> slowly up or down the list. When you release your finger from the list,
> wherever your finger was when you lift it gets selected every, single, time
> and the list closes. Once scrolling begins, you should not be able to select
> an item and close the list unless you tap the list a second time. Lifting
> your finger after scrolling should not result in a selection.
> This leads to a bad user experience because the dropdownlist feels like it is
> randomly closing. It is hard to scroll through moderate length lists. If
> you flick the list it usually scrolls too far, if you then try to scroll more
> deliberately and exactly, the list closes before you get to the right item.
> It feels way too hard to select the item that you want.
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