import React, { Component } from 'react';
import { AppRegistry, View } from 'react-native';

export default class AlignItemsBasics extends Component {
  render() {
    return (
      // 尝试把`alignItems`改为`flex-start`看看
      // 尝试把`justifyContent`改为`flex-end`看看
      // 尝试把`flexDirection`改为`row`看看
      <View style={{
        flex: 1,
        flexDirection: 'column',
        justifyContent: 'center',
        alignItems: 'stretch',
      }}>
        <View style={{
        flex: 1,
        flexDirection: 'row',
        justifyContent: 'center',
        alignItems: 'center',
      }}>
        <View style={{width: 50, height: 50, backgroundColor: 'red'}} />
        <View style={{width: 50,height: 50, backgroundColor: 'blue'}} />
        <View style={{width: 50,height: 100, backgroundColor: 'black'}} />
      </View>
        </View>
    );
  }
};