我定义了两个TextInput字段如下:
<TextInput
style = {styles.titleInput}
returnKeyType = {"next"}
autoFocus = {true}
placeholder = "Title" />
<TextInput
style = {styles.descriptionInput}
multiline = {true}
maxLength = {200}
placeholder = "Description" />
但在按下键盘上的“next”按钮后，我的react-native应用程序并没有跳转到第二个TextInput字段。我怎样才能做到呢?
谢谢!
当前回答
如果你的TextInput在另一个组件中，要让这个被接受的解决方案工作，你需要从ref“弹出”到父容器的引用。
// MyComponent
render() {
<View>
<TextInput ref={(r) => this.props.onRef(r)} { ...this.props }/>
</View>
}
// MyView
render() {
<MyComponent onSubmitEditing={(evt) => this.myField2.focus()}/>
<MyComponent onRef={(r) => this.myField2 = r}/>
}
其他回答
从React Native 0.36开始，不再支持在文本输入节点上调用focus()(在其他几个答案中建议)。相反，你可以使用React Native中的TextInputState模块。我创建了以下帮助模块，使这更容易:
// TextInputManager
//
// Provides helper functions for managing the focus state of text
// inputs. This is a hack! You are supposed to be able to call
// "focus()" directly on TextInput nodes, but that doesn't seem
// to be working as of ReactNative 0.36
//
import { findNodeHandle } from 'react-native'
import TextInputState from 'react-native/lib/TextInputState'
export function focusTextInput(node) {
try {
TextInputState.focusTextInput(findNodeHandle(node))
} catch(e) {
console.log("Couldn't focus text input: ", e.message)
}
}
然后，您可以在TextInput的任何“ref”上调用focusTextInput函数。例如:
...
<TextInput onSubmit={() => focusTextInput(this.refs.inputB)} />
<TextInput ref="inputB" />
...
我创建了一个小库来做这件事，除了替换你的包装视图和导入TextInput，不需要更改代码:
import { Form, TextInput } from 'react-native-autofocus'
export default () => (
<Form>
<TextInput placeholder="test" />
<TextInput placeholder="test 2" />
</Form>
)
https://github.com/zackify/react-native-autofocus
详细解释在这里:https://zach.codes/autofocus-inputs-in-react-native/
import React, { useState, useEffect, useRef, } from 'react';
const OTP = (props) => {
const OTP = [];
const ref_input = [];
ref_input[0] = useRef();
ref_input[1] = useRef();
ref_input[2] = useRef();
ref_input[3] = useRef();
const focusNext = (text, index) => {
if (index < ref_input.length - 1 && text) {
ref_input[index + 1].current.focus();
}
if (index == ref_input.length - 1) {
ref_input[index].current.blur();
}
OTP[index] = text;
}
const focusPrev = (key, index) => {
if (key === "Backspace" && index !== 0) {
ref_input[index - 1].current.focus();
}
}
return (
<SafeAreaView>
<View>
<ScrollView contentInsetAdjustmentBehavior="automatic" showsVerticalScrollIndicator={false}>
<View style={loginScreenStyle.titleWrap}>
<Title style={loginScreenStyle.titleHeading}>Verify OTP</Title>
<Subheading style={loginScreenStyle.subTitle}>Enter the 4 digit code sent to your mobile number</Subheading>
</View>
<View style={loginScreenStyle.inputContainer}>
<TextInput
mode="flat"
selectionColor={Colors.primaryColor}
underlineColorAndroid="transparent"
textAlign='center'
maxLength={1}
keyboardType='numeric'
style={formScreenStyle.otpInputStyle}
autoFocus={true}
returnKeyType="next"
ref={ref_input[0]}
onChangeText={text => focusNext(text, 0)}
onKeyPress={e => focusPrev(e.nativeEvent.key, 0)}
/>
<TextInput
mode="flat"
selectionColor={Colors.primaryColor}
underlineColorAndroid="transparent"
textAlign='center'
maxLength={1}
keyboardType='numeric'
style={formScreenStyle.otpInputStyle}
ref={ref_input[1]}
onChangeText={text => focusNext(text, 1)}
onKeyPress={e => focusPrev(e.nativeEvent.key, 1)}
/>
<TextInput
mode="flat"
selectionColor={Colors.primaryColor}
underlineColorAndroid="transparent"
textAlign='center'
maxLength={1}
keyboardType='numeric'
style={formScreenStyle.otpInputStyle}
ref={ref_input[2]}
onChangeText={text => focusNext(text, 2)}
onKeyPress={e => focusPrev(e.nativeEvent.key, 2)}
/>
<TextInput
mode="flat"
selectionColor={Colors.primaryColor}
underlineColorAndroid="transparent"
textAlign='center'
maxLength={1}
keyboardType='numeric'
style={formScreenStyle.otpInputStyle}
ref={ref_input[3]}
onChangeText={text => focusNext(text, 3)}
onKeyPress={e => focusPrev(e.nativeEvent.key, 3)}
/>
</View>
</ScrollView>
</View>
</SafeAreaView >
)
}
export default OTP;
在React Native的GitHub问题上尝试这个解决方案。
https://github.com/facebook/react-native/pull/2149#issuecomment-129262565
你需要为TextInput组件使用ref道具。 然后你需要创建一个函数，该函数在onSubmitEditing道具上被调用，将焦点移动到第二个TextInput引用上。
var InputScreen = React.createClass({
_focusNextField(nextField) {
this.refs[nextField].focus()
},
render: function() {
return (
<View style={styles.container}>
<TextInput
ref='1'
style={styles.input}
placeholder='Normal'
returnKeyType='next'
blurOnSubmit={false}
onSubmitEditing={() => this._focusNextField('2')}
/>
<TextInput
ref='2'
style={styles.input}
keyboardType='email-address'
placeholder='Email Address'
returnKeyType='next'
blurOnSubmit={false}
onSubmitEditing={() => this._focusNextField('3')}
/>
<TextInput
ref='3'
style={styles.input}
keyboardType='url'
placeholder='URL'
returnKeyType='next'
blurOnSubmit={false}
onSubmitEditing={() => this._focusNextField('4')}
/>
<TextInput
ref='4'
style={styles.input}
keyboardType='numeric'
placeholder='Numeric'
blurOnSubmit={false}
onSubmitEditing={() => this._focusNextField('5')}
/>
<TextInput
ref='5'
style={styles.input}
keyboardType='numbers-and-punctuation'
placeholder='Numbers & Punctuation'
returnKeyType='done'
/>
</View>
);
}
});
<TextInput placeholder="Nombre"
ref="1"
editable={true}
returnKeyType="next"
underlineColorAndroid={'#4DB6AC'}
blurOnSubmit={false}
value={this.state.First_Name}
onChangeText={First_Name => this.setState({ First_Name })}
onSubmitEditing={() => this.focusNextField('2')}
placeholderTextColor="#797a7a" style={{ marginBottom: 10, color: '#808080', fontSize: 15, width: '100%', }} />
<TextInput placeholder="Apellido"
ref="2"
editable={true}
returnKeyType="next"
underlineColorAndroid={'#4DB6AC'}
blurOnSubmit={false}
value={this.state.Last_Name}
onChangeText={Last_Name => this.setState({ Last_Name })}
onSubmitEditing={() => this.focusNextField('3')}
placeholderTextColor="#797a7a" style={{ marginBottom: 10, color: '#808080', fontSize: 15, width: '100%', }} />
和add方法
focusNextField(nextField) {
this.refs[nextField].focus();
}
