blocks|key|4620638|text|实际上，您可以通过参考文献访问textInput的方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4620639|<TextInput+ref={input+=>+this.myInput+=+input}+selectTextOnFocus+style={{height:+100,+width:+100}}+defaultValue='Hey+there'+/>|offset|length|style|CODE|4620640|以及您希望以编程方式选择所有文本的位置，您可以|4620641|this.myInput.focus()|4620642|在iOS上工作，对安卓系统不确定。|4620643|参考资料：http://facebook.github.io/react-native/releases/0.45/docs/textinput.html#selectionstate|4620644|entityMap|0|LINK|mutability|MUTABLE|url|http://facebook.github.io/react-native/releases/0.45/docs/textinput.html#selectionstate^0|0|0|3I|0|0|0|K|0|0|5|2F|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Y|8|@$D|Z|E|10|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|11|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|12|8|@$D|13|E|14|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|15|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|16|8|@]|9|@$D|17|E|18|1|19]]|A|$]]|$1|P|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|Q|$R|$5|S|T|U|A|$V|W]]]]

Actually you can, by accessing textInput's method by refs. 

<code>&lt;TextInput ref={input =&gt; this.myInput = input} selectTextOnFocus style={{height: 100, width: 100}} defaultValue='Hey there' /&gt;</code>

and where you want to select all text programmatically you can 

<code>this.myInput.focus()</code>

works on iOS, not sure about android.

<hr>

<hr>

Reference : <a href="http://facebook.github.io/react-native/releases/0.45/docs/textinput.html#selectionstate" rel="noreferrer">http://facebook.github.io/react-native/releases/0.45/docs/textinput.html#selectionstate</a>

blocks|key|3631215|text|您可以使用selectTextOnFocus来实现这一点。这将确保在挖掘字段时突出显示TextInput中的所有文本。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3631216|entityMap^0|5|H|17|9|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

You can use <code>selectTextOnFocus</code> to achieve this. This will ensure that all text inside the <code>TextInput</code> is highlighted when the field is tapped into.

blocks|key|4207993|text|我不知道是否有更好的办法，但我找到了解决办法。案文必须首先突出重点。下面是一个例子|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4207994|import+React+{+Component+}+from+'react';
import+{+Button,+TextInput,+findNodeHandle+}+from+'react-native';
import+TextInputState+from+'react-native/lib/TextInputState';

class+MyComponent+extends+Component+{
++render()+{
++++return+(
++++++<View+style={{+flex:+1,+}}>
++++++++<Button
++++++++++title="select+text"
++++++++++onPress={()+=>+{
++++++++++++TextInputState.focusTextInput(findNodeHandle(this.inputRef))
++++++++++}}
++++++++</
++++++++<TextInput
++++++++++selectTextOnFocus
++++++++++ref={ref+=>+this.inputRef+=+ref}
++++++++/>
++++++</View>
++++);
++}
}|code-block|syntax|javascript|4207995|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I don't know if there's a better way, but I found a workaround. The text has to be focused first. Here's an example

<pre><code>import React { Component } from 'react';
import { Button, TextInput, findNodeHandle } from 'react-native';
import TextInputState from 'react-native/lib/TextInputState';

class MyComponent extends Component {
 render() {
 return (
 &lt;View style={{ flex: 1, }}&gt;
 &lt;Button
 title="select text"
 onPress={() =&gt; {
 TextInputState.focusTextInput(findNodeHandle(this.inputRef))
 }}
 &lt;/
 &lt;TextInput
 selectTextOnFocus
 ref={ref =&gt; this.inputRef = ref}
 /&gt;
 &lt;/View&gt;
 );
 }
}
</code></pre>

blocks|key|3631328|text|我是来分享我的发现的。在列表中，您可能会遇到selectTextOnFocus被破坏的情况。在这种情况下，您可以使用此方法selection。从反应-原住民我发现了这个：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3631329|​|3631330|📷|atomic|3631331|3631332|在我的例子中，我在列表中遇到了selectTextOnFocus道具的问题。因此，我不得不添加一个debounce函数来处理selection支柱。|3631333|const+[shouldSelect,+setShouldSelect]+=+useState(undefined);
const+onFocus+=+()+=>{
++++setShouldSelect({start:0,+end:String(text).length});
}
const+focus+=+useCallback(_.debounce(onFocus,500),[shouldSelect]);
++<TextInput
++++++++selection={shouldSelect}
++++++++onBlur={()=>setShouldSelect(undefined)}
++++++++onFocus={()=>focus()}//+this+is+important
++++++++selectTextOnFocus
++++++++ref={r=>onRef(r)}
++++++++keyboardType={'number-pad'}
++++++++autoCorrect={false}
++++++++blurOnSubmit={false}
++++++++returnKeyType={'done'}
++++++++underlineColorIos={'transparent'}
++++++++underlineColorAndroid={'white'}
++++++++allowFontScaling={false}
++++++++value={String(text)}
++++/>|code-block|syntax|javascript|3631334|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/36ecf6a2c9dc334f0ec0928a2578fdbc.png|imageAlt^0|M|H|1P|9|0|0|0|1|0|0|0|F|H|1D|8|1Q|9|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@$9|12|A|13|B|C]|$9|14|A|15|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|16|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|17|8|@]|D|@$9|18|A|19|1|1A]]|E|$]]|$1|K|3|G|5|6|7|1B|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|1C|8|@$9|1D|A|1E|B|C]|$9|1F|A|1G|B|C]|$9|1H|A|1I|B|C]]|D|@]|E|$]]|$1|N|3|O|5|P|7|1J|8|@]|D|@]|E|$Q|R]]|$1|S|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z|10|-4]]]]

I'm here to share my findings. In a List, you might encounter that <code>selectTextOnFocus</code> is broken. In this case you can use this method <code>selection</code>. From React-Native I found this:
<a href="https://i.stack.imgur.com/wYR4O.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wYR4O.png" alt="enter image description here" /></a>
In my case I had trouble with the <code>selectTextOnFocus</code> prop in a list. So I had to add a <code>debounce</code> function to work with <code>selection</code> prop.
<pre><code>const [shouldSelect, setShouldSelect] = useState(undefined);
const onFocus = () =&gt;{
 setShouldSelect({start:0, end:String(text).length});
}
const focus = useCallback(_.debounce(onFocus,500),[shouldSelect]);
 &lt;TextInput
 selection={shouldSelect}
 onBlur={()=&gt;setShouldSelect(undefined)}
 onFocus={()=&gt;focus()}// this is important
 selectTextOnFocus
 ref={r=&gt;onRef(r)}
 keyboardType={'number-pad'}
 autoCorrect={false}
 blurOnSubmit={false}
 returnKeyType={'done'}
 underlineColorIos={'transparent'}
 underlineColorAndroid={'white'}
 allowFontScaling={false}
 value={String(text)}
 /&gt;
</code></pre>

blocks|key|4208007|text|this.inputRef.focus()将焦点设置为TextInput组件，然后您在属性selectTextOnFocus中设置的标志执行其余的操作。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4208008|entityMap^0|0|L|R|9|19|H|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

<code>this.inputRef.focus()</code> sets focus to the <code>TextInput</code> component, and then the flag you set in the attributes <code>selectTextOnFocus</code> does the rest.

Is there a way to programmatically highlight/select text that is inside a TextInput component?

How to programmatically select text in a TextInput component

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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是否有一种以编程方式突出显示/选择TextInput组件中的文本的方法？

问如何以编程方式选择TextInput组件中的文本
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