blocks|key|1915305|text|不幸的是，目前还不支持CupertinoPicker/CupertinoDatePicker内部的手势检测。当您跟踪CupertinoPicker中的代码时，它会导致在最后使用ListWheelScrollView，并且它不会响应tap事件。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1915306|关于GitHub的讨论线程：|1915307|点击项在CupertinoPicker中不起作用|unordered-list-item|1915308|ListWheelScrollView子级不响应手势(onTap)事件|1915309|有一个解决方案，使用包视图+(子小部件的固定高度，提到这里)。|1915310|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/flutter/flutter/issues/24089|1|https://github.com/flutter/flutter/issues/38803|2|https://pub.dev/packages/clickable_list_wheel_view|3|https://github.com/flutter/flutter/issues/38803#issuecomment-762748940^0|B|Z|1M|F|2G|J|0|0|0|O|0|0|0|Z|1|0|B|2|2|R|2|3|0^^$0|@$1|2|3|4|5|6|7|12|8|@$9|13|A|14|B|C]|$9|15|A|16|B|C]|$9|17|A|18|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|19|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|1A|8|@]|D|@$9|1B|A|1C|1|1D]]|E|$]]|$1|K|3|L|5|J|7|1E|8|@]|D|@$9|1F|A|1G|1|1H]]|E|$]]|$1|M|3|N|5|6|7|1I|8|@]|D|@$9|1J|A|1K|1|1L]|$9|1M|A|1N|1|1O]]|E|$]]|$1|O|3|-4|5|6|7|1P|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]|W|$5|R|S|T|E|$U|X]]|Y|$5|R|S|T|E|$U|Z]]|10|$5|R|S|T|E|$U|11]]]]

Unfortunately, the gesture detection inside <code>CupertinoPicker/CupertinoDatePicker</code> is not supported for now. When you trace the code inside <code>CupertinoPicker</code>, it leads to use <code>ListWheelScrollView</code> at the end and it does not respond to the tap event.
Discussion thread on GitHub:
<ul>
<li><a href="https://github.com/flutter/flutter/issues/24089" rel="nofollow noreferrer">Tapping items is not working in CupertinoPicker</a></li>
<li><a href="https://github.com/flutter/flutter/issues/38803" rel="nofollow noreferrer">ListWheelScrollView children do not respond on gesture (onTap) events</a></li>
</ul>
There is a workaround solution by using package <a href="https://pub.dev/packages/clickable_list_wheel_view" rel="nofollow noreferrer">clickable_list_wheel_view</a> (fixed height for the child widget, mentioned <a href="https://github.com/flutter/flutter/issues/38803#issuecomment-762748940" rel="nofollow noreferrer">here</a>)

blocks|key|2340797|text|我通过使用flutter_portal找到了一个解决办法。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2340798|++final+ScrollController+scrollController+=+FixedExtentScrollController();

++@override
++Widget+build(BuildContext+context)+{
++++return+Container(
++++++++height:+100,
++++++++child:+Portal(
++++++++++child:+CupertinoPicker.builder(
++++++++++++scrollController:+scrollController,
++++++++++++childCount:+itemCount,
++++++++++++itemBuilder:+(context,+index)+{
++++++++++++++return+PortalTarget(
++++++++++++++++anchor:+Aligned(
++++++++++++++++++follower:+Alignment.center,
++++++++++++++++++target:+Alignment.center,
++++++++++++++++),
++++++++++++++++portalFollower:+GestureDetector(
++++++++++++++++++behavior:+HitTestBehavior.translucent,
++++++++++++++++++onTap:+()+{
++++++++++++++++++++scrollController.animateToItem(index,
++++++++++++++++++++++++duration:+Duration(milliseconds:+250),
++++++++++++++++++++++++curve:+Curves.decelerate);
++++++++++++++++++},
++++++++++++++++),
++++++++++++++++child:+Text(index.toString()),
++++++++++++++);
++++++++++++},
++++++++++),
++++++++)
++++);
++}|code-block|syntax|javascript|2340799|entityMap^0|5|E|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

I found a workaround by using <code>flutter_portal</code>.
<pre><code> final ScrollController scrollController = FixedExtentScrollController();

 @override
 Widget build(BuildContext context) {
 return Container(
 height: 100,
 child: Portal(
 child: CupertinoPicker.builder(
 scrollController: scrollController,
 childCount: itemCount,
 itemBuilder: (context, index) {
 return PortalTarget(
 anchor: Aligned(
 follower: Alignment.center,
 target: Alignment.center,
 ),
 portalFollower: GestureDetector(
 behavior: HitTestBehavior.translucent,
 onTap: () {
 scrollController.animateToItem(index,
 duration: Duration(milliseconds: 250),
 curve: Curves.decelerate);
 },
 ),
 child: Text(index.toString()),
 );
 },
 ),
 )
 );
 }
</code></pre>

blocks|key|42948|text|GestureDetector(
++++behavior:+HitTestBehavior.translucent,
++++onTap:+()+=>+//+write+what+you+want+to+do,
++++child:+CupertinoPicker(),
++),|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|42949|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>GestureDetector(
 behavior: HitTestBehavior.translucent,
 onTap: () =&gt; // write what you want to do,
 child: CupertinoPicker(),
 ),
</code></pre>

onSelectedItemChanged is working perfectly in CupertinoPicker/CupertinoDatePicker
But I also want to pick value when user clicked the value.
Currently, user must scroll in order to pick the value, and as far as I know CupertinoPicker/CupertinoDatePicker doesn't have onTap, onPressed functions
How can I solve this issue
<a href="https://i.stack.imgur.com/g1zSb.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/g1zSb.png" alt="enter image description here" /></a>

Pick Value onTap in CupertinoPicker and CupertinoDatePicker

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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onSelectedItemChanged在库比提克/库比蒂诺数据选择器上运行得很好但是，当用户单击该值时，我也希望选择值。目前，用户必须滚动以选择值，据我所知，CupertinoPicker/CupertinoDatePicker没有onTap、onPressed函数我如何解决这个问题？​​

问onTap在CupertinoPicker和CupertinoDatePicker中的选取值
EN

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