格式化在 JavaScript 中无法正常工作

Question

问题 在 react native 和 JavaScript 中，我正在编写一个应用程序。加载字体的按钮占据了一半的屏幕，而实际的应用程序占据了另一半。我想知道如何让按钮占据顶部，然后让应用程序的其余部分渲染得更大。帮助会很棒！

代码

import React, { Component } from 'react';
import { StyleSheet, Text, View, Image, TextInput, ScrollView, TouchableHighlight, Button } from 'react-native';
import { Font } from 'expo';

var fontLoaded = false;

export default class App extends React.Component {

  state = {
    fontLoaded: false,
  };

  componentDidMount() {
      Expo.Font.loadAsync({
        'Cabin-Regular-TTF': require('./Cabin-Regular-TTF.ttf'),
      });
 }
  constructor(props) {
    super(props);
    this.state = { postInput: ""}
  }

 render() {
    return (
      <View style={styles.container}>
        <View style={styles.container}>
          <View style={{width: 1, height: 30, backgroundColor: '#e8e8e8'}} />
          <Button
            onPress={() => this.setState({ fontLoaded: true })}
            title="Press Me To Load the App After 15 Seconds!"
            color="#fe8200"
            accessibilityLabel="Wait 15 seconds and then press me to load the font!"
          />
        </View>


        {this.state.fontLoaded ? (
          <View style={styles.container}>
            <Text style={{ fontFamily: 'Cabin-Regular-TTF', fontSize: 16 }}>
                Whats on your mind? Create a post!
            </Text>  

            <TextInput
                 style={{height:40, width: 320, borderColor: '#303030', borderWidth: 1}}
                 onChangeText={(postInput)=>this.setState({postInput})}
                 value={this.state.postInput}    
             />



        <Button
                title="          +          "
                color="#fe8200"
                accessibilityLabel="Wait 15 seconds and then press me to load the font!"
            />

            <ScrollView>
               <View style={{width: 1, height: 6, backgroundColor: '#e8e8e8'}} />
               <View style={{width: 300, height: 250, backgroundColor: '#1daff1'}} />
               <View style={{width: 300, height: 40, backgroundColor: '#147aa8'}} />
               <View style={{width: 1, height: 6, backgroundColor: '#e8e8e8'}} />
               <View style={{width: 300, height: 250, backgroundColor: '#1daff1'}} />
               <View style={{width: 300, height: 40, backgroundColor: '#147aa8'}} />
               <View style={{width: 1, height: 6, backgroundColor: '#e8e8e8'}} />
             </ScrollView>
          </View>) : (null) }
      </View>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#e8e8e8',
    alignItems: 'center',
    justifyContent: 'center'
  },
});

截图

Answer 1

您可以使用 flexbox 来实现这一点。将 flex 属性视为一个比率。如果你给你的按钮容器一个 flex 为 1 并且给它下面的容器一个 flex 3，它们的比例将是 3:1。