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！