fix: Keyboard not showing up on iOS when focus

[kerm1it]

close #26648

@afc163

发现是这次提交导致的问题：ed63549

我看你把 focus 从 onClick 挪到了 onMouseDown 中，这导致在 IOS 上无法正常聚焦调起键盘，我又放回在 onClick 中了，你看看有什么问题？

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[codecov]

Codecov Report

Merging #545 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #545   +/-   ##
=======================================
  Coverage   99.37%   99.37%           
=======================================
  Files          20       20           
  Lines         955      956    +1     
  Branches      321      320    -1     
=======================================
+ Hits          949      950    +1     
  Misses          5        5           
  Partials        1        1           

Impacted Files	Coverage Δ
src/Selector/index.tsx	96.82% <100.00%> (+0.05%)	⬆️

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[afc163]

测一下 IE11 的 onFocus。

[tkempken]

@kermit-xuan @afc163
Maybe it will help to add an additional touchstart event. In this case, IE11 and ios touch devices will be happy.

[kerm1it]

This is not work in IE 11.

touchstart is event for mobile decices. I don't know whether it will appear other problems.

I think we won't resolve problem, the reason is in ant-design/ant-design#26648 (comment)

@afc163 What do you think?

[afc163]

Using click event is a accepted way for both desktop and mobile devices.

[kerm1it]

I try this example in IE11. onFocus isn't called when click selector(not input element)

You can try it again in IE11.

[afc163]

我在 IE11 下测试，不加这个 hack，IE 也能触发了。

也就是说完全回到 #513 修改前的状态也能触发 focus 了，见鬼。

[afc163]

先这样吧，遇到反馈再说。