ReactNative:如何中心文本? [英] ReactNative: how to center text?

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本文介绍了ReactNative:如何中心文本?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

如何在ReactNative中横向和纵向放置文本?



我在rnplay.org中有一个示例应用程序,其中 justifyContent =center alignItems =center不工作:
https://rnplay.org/apps/AoxNKQ



文本应该居中。
为什么文本(黄色)和父容器之间的顶部有一个边距?



代码:

 'use strict'; 

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

SampleApp = React.createClass({
render:function(){
return(
< View style = {styles.container}>
< View style = {styles.topBox}>
< Text style = {styles.headline}> lorem ipsum {'\\\
'} ipsum lorem lorem< / Text>

< / View>
< View style = {styles.otherContainer}>
< / View>
< / View>
;
}
});

var styles = StyleSheet.create({

container:{
flex:1,
flexDirection:'column',
backgroundColor :'red',
justifyContent:'center',
alignItems:'center',
},
$ b topBox:{
flex:1,
flexDirection:'row',
backgroundColor:'lightgray',
justifyContent:'center',
alignItems:'center',
},
标题:{
fontWeight:'bold',
fontSize:18,
marginTop:0,
width:200,
height:80,
backgroundColor :'yellow',
justifyContent:'center',
alignItems:'center',
},

otherContainer:{
flex:4,
justifyContent:'center',
alignItems:'center',
backgroundColor:'green',
},


}) ;

AppRegistry.registerComponent('SampleApp',()=> SampleApp);

module.exports = SampleApp;


解决方案

来自标题'style remove height justifyContent alignItems 。它将垂直居中文本。添加 textAlign:'center',它将水平居中文本。

 标题:{
textAlign:'center',//< - magic
fontWeight:'bold',
fontSize:18,
marginTop:0,
width:200,
backgroundColor:'yellow',
}


How to center Text in ReactNative both in horizontal and vertical?

I have an example application in rnplay.org where justifyContent="center" and alignItems="center" is not working: https://rnplay.org/apps/AoxNKQ

The text should being centered. And why is there a margin at the top between the text (yellow) and parent container?

Code:

'use strict';

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

var SampleApp = React.createClass({
  render: function() {
    return (
            <View style={styles.container}>
                <View style={styles.topBox}>
                    <Text style={styles.headline}>lorem ipsum{'\n'}ipsum lorem lorem</Text>

                </View>
                <View style={styles.otherContainer}>
                </View>
            </View>
    );
  }
});

var styles = StyleSheet.create({

    container: {
        flex: 1,
        flexDirection: 'column',
        backgroundColor: 'red',
        justifyContent: 'center',
        alignItems: 'center',
    },

    topBox: {
        flex: 1,
        flexDirection: 'row',
        backgroundColor: 'lightgray',
        justifyContent: 'center',
        alignItems: 'center',
    },
    headline: {
        fontWeight: 'bold',
        fontSize: 18,
    marginTop: 0,
        width: 200,
        height: 80,
    backgroundColor: 'yellow',
        justifyContent: 'center',
        alignItems: 'center',
    },

  otherContainer: {
        flex: 4,
        justifyContent: 'center',
        alignItems: 'center',
    backgroundColor: 'green',
    },


});

AppRegistry.registerComponent('SampleApp', () => SampleApp);

module.exports = SampleApp;

解决方案

From headline' style remove height, justifyContent and alignItems. It will center the text vertically. Add textAlign: 'center' and it will center the text horizontally.

  headline: {
    textAlign: 'center', // <-- the magic
    fontWeight: 'bold',
    fontSize: 18,
    marginTop: 0,
    width: 200,
    backgroundColor: 'yellow',
  }

这篇关于ReactNative:如何中心文本?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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