reactjs

ReactNative에서 텍스트를 가로 및 세로로 가운데 맞추는 방법은 무엇입니까?

rnplay.org에 예제 응용 프로그램이 있는데 justifyContent = “center” 및 alignItems = “center” 가 작동하지 않습니다.
https://rnplay.org/apps/AoxNKQ

텍스트가 가운데에 있어야합니다. 왜 텍스트 (노란색)와 부모 컨테이너 사이에 여백이 있습니까?

암호:

'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;

답변

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

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

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

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

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

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

textAlignVertical: "center"

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

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

{ alignSelf : "center" }