[reactjs] ReactNative: how to center text?

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;

Already answered but I'd like to add a bit more on the topic and different ways to do it depending on your use case.

You can add adjustsFontSizeToFit={true} (currently undocumented) to Text Component to auto adjust the size inside a parent node.

  <Text adjustsFontSizeToFit={true} numberOfLines={1}>Hiiiz</Text>

You can also add the following in your Text Component:

<Text style={{textAlignVertical: "center",textAlign: "center",}}>Hiiiz</Text>

Or you can add the following into the parent of the Text component:

<View style={{flex:1,justifyContent: "center",alignItems: "center"}}>
     <Text>Hiiiz</Text>
</View>

or both

 <View style={{flex:1,justifyContent: "center",alignItems: "center"}}>
     <Text style={{textAlignVertical: "center",textAlign: "center",}}>Hiiiz</Text>
</View>

or all three

 <View style={{flex:1,justifyContent: "center",alignItems: "center"}}>
     <Text adjustsFontSizeToFit={true} 
           numberOfLines={1} 
           style={{textAlignVertical: "center",textAlign: "center",}}>Hiiiz</Text>
</View>

It all depends on what you're doing. You can also checkout my full blog post on the topic

https://medium.com/@vygaio/how-to-auto-adjust-text-font-size-to-fit-into-a-nodes-width-in-react-native-9f7d1d68305b

Simple add

textAlign: "center"

in your styleSheet, that's it. Hope this would help.

edit: "center"

Wherever you have Text component in your page just you need to set style of the Text component.

 <Text style={{ textAlign: 'center' }}> Text here </Text>

you don't need to add any other styling property, this is spectacular magic it will set you text in center of the your UI.

used

textalign:center

at the view

Set in Parent view

justifyContent:center

and in child view alignSelf:center

const styles = StyleSheet.create({
        navigationView: {
        height: 44,
        width: '100%',
        backgroundColor:'darkgray',
        justifyContent: 'center', 
        alignItems: 'center' 
    },
    titleText: {
        fontSize: 20,
        fontWeight: 'bold',
        color: 'white',
        textAlign: 'center',
    },
})


render() {
    return (
        <View style = { styles.navigationView }>
            <Text style = { styles.titleText } > Title name here </Text>
        </View>
    )

}

Set these styles to image component: { textAlignVertical: "center", textAlign: "center" }

Okey , so its a basic problem , dont worry about this just write the <View> component and wrap it around the <Text> component

<View style={{alignItems: 'center'}}>
<Text> Write your Text Here</Text>
</View>

alignitems:center is a prop use to center items on crossaxis

justifycontent:'center' is a prop use to center items on mainaxis

You can use alignSelf property on Text component

{ alignSelf : "center" }

this is a example for Horizontal and Vertical alignment simultaneously

<View style={{width: 200, flexDirection: 'row',alignItems: 'center'}}>
     <Text style={{width: '100%',textAlign: 'center'}} />
</View>

Horizontal and Vertical center alignment

<View style={{flex: 1, justifyContent: 'center',alignItems: 'center'}}>
     <Text> Example Test </Text>
</View>

textAlignVertical: "center"

is the real magic.

In addition to the use cases mentioned in the other answers:

To center text in the specific use case of a BottomTabNavigator, remember to set showIcon to false (even if you don't have icons in the TabNavigator). Otherwise the text will be pushed toward bottom of Tab.

For example:

const TabNavigator = createBottomTabNavigator({
  Home: HomeScreen,
  Settings: SettingsScreen
}, {
  tabBarOptions: {
    activeTintColor: 'white',
    inactiveTintColor: 'black',
    showIcon: false, //do this
    labelStyle: {
      fontSize: 20,
      textAlign: 'center',
    },
    tabStyle: {
      backgroundColor: 'grey',
      marginTop: 0,
      textAlign: 'center',
      justifyContent: 'center',
      textAlignVertical: "center"
    }
  }

first add in parent view flex:1, justifyContent: 'center', alignItems: 'center'

then in text add textAlign:'center'

The following property can be used: {{alignItems: 'center'}}

<View style={{alignItems: 'center'}}>
 <Text> Hello i'm centered text</Text>
</View>

You can use two approaches for this...

1. To make text align center horizontally, apply this Property (textAlign:"center"). Now to make the text align vertically, first check direction of flex. If flexDirection is column apply property (justifyContent:"center") and if flexDirection is row is row apply property (alignItems : "center") .

2. To Make text align center apply same property (textAlign:"center"). Now to make it align vertically make the hieght of the <Text> </Text> equal to view and then apply property (textAlignVertical: "center")...

Most Probably it will Work...