Question

您好我正在阅读React-Native教程并使用TouchableHighLight创建一个按钮。第一个按钮正确显示，第二个按钮显示带有“位置”文本的直线。

'use strict';

import React, { Component } from 'react'
import {
    StyleSheet,
    Text,
    TextInput,
    View,
    TouchableHighlight,
    ActivityIndicator,
    Image
} from 'react-native';


class SearchPage extends Component {
    render() {
        return (
            <View style={styles.container}>
                <Text style={styles.description}>
                Search for houses to buy!
                </Text>
                <Text style={styles.description}>
                Search by place-name, postcode or search near your location.
                </Text>
            <View style={styles.flowRight}>
                <TextInput
                style={styles.searchInput}
                placeholder='Search via name or postcode'/>
                <TouchableHighlight style={styles.button}
                underlayColor='#99d9f4'>
                <Text style={styles.buttonText}>Go</Text>
                </TouchableHighlight>
            </View>
                <TouchableHighlight style={styles.button}
                underlayColor='#99d9f4'>
                <Text style={styles.buttonText}>Location</Text>
                </TouchableHighlight>
                <Image source={require('./Resources/house.png')} style={styles.image}/>
            </View>
        );
    }
}

var styles = StyleSheet.create({
    description: {
        marginBottom: 20,
        fontSize: 18,
        textAlign: 'center',
        color: "#656565"
    },
    container: {
        padding: 30,
        marginTop: 65,
        alignItems: 'center'
    },
    flowRight: {
        flexDirection: 'row',
        alignItems: 'center',
        alignSelf: 'stretch'
    },
    buttonText: {
        fontSize: 18,
        color: 'white',
        alignSelf: 'center'
    },
    button: {
        height: 36,
        flex: 1,
        flexDirection: 'row',
        backgroundColor: '#48BBEC',
        borderColor: '#48BBEC',
        borderWidth: 1,
        borderRadius: 8,
        marginBottom: 10,
        alignSelf: 'stretch',
        justifyContent: 'center'
    },
    searchInput: {
        height: 36,
        padding: 4,
        marginRight: 5,
        flex: 4,
        fontSize: 18,
        borderWidth: 1,
        borderColor: '#48BBEC',
        borderRadius: 8,
        color: '#48BBEC'
    },
    image: {
    width: 217,
    height: 138
}
});

module.exports = SearchPage;

Answer 1

看起来很好。 Android Emulator, Android 6.0, API 23, Google APIs Intel Atom (x86)

Answer 2

不确定是否会导致拼写错误的复制/粘贴，代码中有两个<View>个标记丢失。

<View style={styles.container}>

  ...

  <View> // Missing tag for second button
    <TouchableHighlight style={styles.button} underlayColor='#99d9f4'>
      ...
    </TouchableHighlight>
  </View>

</View> // Missing tag for <View style={styles.container}>

Answer 3

你错过了导入Button。要使用组件，必须在使用之前导入该组件。

import {
  //...
  //...
  View,
  Button
  //...
} from 'react-native';

只需将Button放在import语句中，我希望它能正常工作。

Answer 4

我没有花太多时间去挖掘并找到根本原因，但这里是快速修复。从styles.button块中删除flex:1并使用以下内容更新渲染功能。

class SearchPage extends Component {
render() {
        let flextStyles = {
            flex: 1
        };
        //rest of the code as it is
        ...
        //replace go button with following code
        <TouchableHighlight style={[styles.button, flextStyles]}
                    underlayColor='#99d9f4'>
            <Text style={styles.buttonText}>Go</Text>
        </TouchableHighlight>
        ...
       //rest of the code as it is
}}

检查截图，它将解决问题。

按钮不显示React-Native

4 个答案: