React Native:当将TextInput放入View中时，它将消失

我（在android上）尝试了您的示例，使用您提供的确切代码，屏幕完全是空的。如果在文本输入上没有样式，它们就不会显示，并且您已经在styles.title和styles.body中为TextInput组件->设置了style.title和styles.body，您没有（同时）宽度和高度。所以你能做的是：

• 将width添加到您的标题和正文样式中

或

• 将样式添加到数组中的文本输入，并将两种样式应用于textInput和标题/正文，如下所示：style={[styles.textInput, styles.title]}和style={[styles.textInput, styles.body]}

以下是我给你的两个建议的工作代码：

import React, {
AppRegistry,
    Component,
    StyleSheet,
    TextInput,
    View
} from 'react-native';
export default class NoteScreen extends Component {
    render() {
        return (
            <View style={styles.container}>
                <View style={styles.inputContainer}>
                    <TextInput
                        ref="title"
                        autoFocus={true}
                        autoCapitalize="sentences"
                        placeholder="Untitled"
                        style={styles.title}
                        onEndEditing={(text) => {this.refs.body.focus()}}
                    />
                </View>
                <View style={styles.inputContainer}>
                    <TextInput
                        ref="body"
                        multiline={true}
                        placeholder="Start typing"
                        style={[styles.textInput, styles.body]}
                        textAlignVertical="top"
                        underlineColorAndroid="transparent"
                    />
                </View>
            </View>
        );
    }
}
var styles = StyleSheet.create({
    container: {
        flex: 1,
        justifyContent: 'center',
        alignItems: 'center',
        marginTop: 64
    },
    textInput: {
        color: '#ffffff',
        flex: 1,
        width: 60,
        height: 60,
        fontSize: 16
    },
    inputContainer: {
        borderBottomColor: '#9E7CE3',
        borderBottomWidth: 1,
        flex: 1,
        flexDirection: 'row',
        marginBottom: 10
    },
    title: {
        fontFamily: 'Overpass-Bold',
        height: 40,
        width: 40
    },
    body: {
        fontFamily: 'Overpass-Bold',
        flex: 1
    }
});

我相信我们读的是同一本书，因为我遇到了同样的问题。

我通过删除容器样式中的alignItems: 'center'并将flex: 1添加到输入容器

以下是我的代码：

import React, { StyleSheet, Text, TextInput, View } from "react-native";
import dismissKeyboard from "dismissKeyboard";
export default class NoteScreen extends React.Component {
    render() {
        handleTitleEditingEnd = (text) => { this.refs.body.focus(); };
        return (
            <View style={styles.container}>
                <View style={styles.inputContainer}>
                    <TextInput
                        ref="title"
                        placeholder="Untitled"
                        style={[styles.textInput, styles.title]}
                        onEndEditing={handleTitleEditingEnd}
                        returnKeyType="next"
                    />
                </View>
                <View style={styles.inputContainer}>
                    <TextInput
                        ref="body"
                        multiline={true}
                        placeholder="Start typing"
                        style={[styles.textInput, styles.body]}
                    />
                </View>
            </View>
        );
    }
}
const styles = StyleSheet.create({
    container: {
        flex: 1,
        justifyContent: "center",
        // alignItems: "center",
        marginTop: 64
    },
    inputContainer: {
        borderBottomColor: "#9E7CE3",
        borderBottomWidth: 1,
        flexDirection: "row",
        marginBottom: 10,
        flex: 1,
    },
    textInput: {
        flex: 1,
        fontSize: 16,
    }, 
    title: {
        height: 40,
    },
    body: {
        flex: 1,
    }
});

如果<Text>在<View>中没有高度，请尝试从容器中移除flex : 1。

我用下面的代码解决了这个问题：

import React, {
  StyleSheet,
  TextInput,
  View
} from 'react-native';
export default class NoteScreen extends React.Component {
  render() {
    return (
      <View style={styles.container}>
        <View style={styles.inputContainer}>
            <TextInput ref="title" autoFocus={true} autoCapitalize="sentences" placeholder="Untitled" style={[styles.textInput, styles.title]} onEndEditing={(text) => {this.refs.body.focus()} }/>
        </View>
        <View style={styles.inputContainer}>
            <TextInput ref="body" multiline={true} placeholder="Start typing" style={[styles.textInput, styles.body]}/>
        </View>
      </View>
    );
  }
}
var styles = StyleSheet.create({
  container: {
    flex: 1,
    alignItems: 'center',
    marginTop: 64
  },
  title: {
    height: 40
  },
  body: {
    height: 160,
    flex: 1
  },
  inputContainer: {
    borderBottomColor: '#9E7CE3',
    borderBottomWidth: 1,
    flexDirection: 'row',
    marginBottom: 10
  },
  textInput: {
    flex: 1,
    fontSize: 16,
    width: 300,
  }
});