下面的代码可以在这个实际示例中找到

我有以下react原生元素:

'use strict';

var React = require('react-native');
var {
  AppRegistry,
  StyleSheet,
  Text,
  View,
} = React;

var SampleApp = React.createClass({
  render: function() {
    return      (
  <View style={styles.container}>

        <View style={styles.descriptionContainerVer}>
          <View style={styles.descriptionContainerHor}>
            <Text style={styles.descriptionText} numberOfLines={5} >
              Here is a really long text that you can do nothing about, its gonna be long wether you like it or not, so be prepared for it to go off screen. Right? Right..!
            </Text>
          </View>
        </View>

        <View style={styles.descriptionContainerVer2}>
          <View style={styles.descriptionContainerHor}>
            <Text style={styles.descriptionText} numberOfLines={5} >Some other long text which you can still do nothing about.. Off the screen we go then.</Text>
          </View>
        </View>



  </View>);
  }
});
AppRegistry.registerComponent('SampleApp', () => SampleApp);

款式如下:

var styles = StyleSheet.create({
  container:{
        flex:1,
    flexDirection:'column',
        justifyContent: 'flex-start',
        backgroundColor: 'grey'
    },
    descriptionContainerVer:{
    flex:0.5, //height (according to its parent)
    flexDirection: 'column', //its children will be in a row
    alignItems: 'center',
    backgroundColor: 'blue',
    // alignSelf: 'center',
  },
  descriptionContainerVer2:{
    flex:0.5, //height (according to its parent)
    flexDirection: 'column', //its children will be in a row
    alignItems: 'center',
    backgroundColor: 'orange',
    // alignSelf: 'center',
  },
  descriptionContainerHor:{
    //width: 200, //I DON\'T want this line here, because I need to support many screen sizes
    flex: 0.3,  //width (according to its parent)
    flexDirection: 'column',    //its children will be in a column
    alignItems: 'center', //align items according to this parent (like setting self align on each item)
    justifyContent: 'center',
    flexWrap: 'wrap'
  },
  descriptionText: {
    backgroundColor: 'green',//Colors.transparentColor,
    fontSize: 16,
    color: 'white',
    textAlign: 'center',
    flexWrap: 'wrap'
  }
});

这将导致以下屏幕:

我如何阻止文本离开屏幕,并将其限制在屏幕中间,宽度为父屏幕的80%。

我不认为我应该使用宽度,因为我将在许多不同的手机屏幕上运行它,我希望它是动态的,所以我认为我应该完全依赖flexbox。

(这就是我在descriptionContainerHor中使用flex: 0.8的最初原因。

我想要实现的是这样的:

谢谢你!


当前回答

没有一个答案对我有用,所以我决定使用一种破解方法,即通过空白分割文本,并分别呈现每个单词。

虽然这是一种hack,但好处是我不必太担心由于父容器样式而弄乱包装。

// This code is written in Typescript
import React from 'react'
import { StyleSheet, View, Text } from 'react-native'
const styles = StyleSheet.create({
  container: {
    display: 'flex',
    flexWrap: 'wrap',
    flexDirection: 'row',
    flex: 1,
    justifyContent: 'center',
    paddingVertical: 8,
  },
})

export const WrapText: React.FC<{
  text: string
}> = ({ text }) => {
  return (
    <View style={styles.container}>
      {text.split(' ').map((word, index) => (
          <Text key={index}>
            {word}{' '}
          </Text>
        ))}
    </View>
  )
}

const Example = <WrapText text="Hello this is a working hack that wraps your text."/>

P/S:当然这只适用于字母书写系统,其他不使用空格的书写系统(例如中文书写)将不会使用此组件进行换行。

其他回答

<Text style={{width: 200}} numberOfLines={1} ellipsizeMode="tail">Your text here</Text>

我也有同样的问题,要修复它,我必须确保所有视图父母有style={{flex: 1}}

我认为你可以这样做,为了更好的想法,我附上了一张带有代码的图片:

所以,我们可以这样做:

TermsOfService = {
  fontFamily: 'Verlag-Book';
  fontSize: 14px;
  textAlign: center;
},
HighlightedText = {
  font-family: 'Verlag-Book';
  font-size: 14px;
  text-align: center;
  color: ${COLORS.PRIMARY_ADMIRAL_BLUE};
},
Container: {
  width: 100%;
  alignSelf: center;
  alignItems: center;
  justifyContent: center;
  flexDirection: row;
  flexWrap: wrap;
}

并且是你的组件,像这样使用它:

 <View style={Container}>
   <Text style={TermsOfService}>By joining, you agree to the some thing </Text>
   <Text style={HighlightedText}>this is highlighted </Text>
   <Text style={TermsOfService}>and </Text>
   <Text style={HighlightedText}>and this as well</Text>
 </View>

大多数时候,我们在使用flexDirection: 'row'时看到这个问题,因为在其他情况下,它得到了正确的处理。

无论如何,这里有两种方法来适当地包装文本;

第一种方法:

要将文本换行到下一行并且不离开显示,可以通过限制< text >;

<Text style={{width: "60%"}}>some long text goes here ...</Text>

上面的代码将限制文本宽度为可用宽度的60%,如果整个文本不适合这个宽度,它将自动换行,即剩余的文本将移动到下一行,依此类推。

第二种方法

在文本元素和包装它的父元素上设置flexShrink: 1。

e.g,

<View style={{ flexShrink: 1, justifyContent: 'space-between', alignItems: 'center', flex: 1, flexDirection: 'row'}}>
    <Text>First long string which goes long....</Text>
    <Text style={{flexShrink: 1}}>This is a long long text which must go out of the screen if we dont style it properly and not do some logic here</Text>
</View>

其他样式只是为了显示结果工作正常。flexShrink: 1是你唯一需要的东西。

<SafeAreaView style={{flex:1}}>
  <View style={{alignItems:'center'}}>
    <Text style={{ textAlign:'center' }}>
      This code will make your text centered even when there is a line-break
    </Text>
  </View>
</SafeAreaView>