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
在你的组件中:
constructor(props) {
super(props);
this.focusNextField = this
.focusNextField
.bind(this);
// to store our input refs
this.inputs = {};
}
focusNextField(id) {
console.log("focus next input: " + id);
this
.inputs[id]
._root
.focus();
}
注意:我使用了._root，因为它是NativeBase' library ' Input中的TextInput的引用
在文本输入中，像这样
<TextInput
onSubmitEditing={() => {
this.focusNextField('two');
}}
returnKeyType="next"
blurOnSubmit={false}/>
<TextInput
ref={input => {
this.inputs['two'] = input;
}}/>
其他回答
使用回调引用而不是遗留的字符串引用:
<TextInput
style = {styles.titleInput}
returnKeyType = {"next"}
autoFocus = {true}
placeholder = "Title"
onSubmitEditing={() => {this.nextInput.focus()}}
/>
<TextInput
style = {styles.descriptionInput}
multiline = {true}
maxLength = {200}
placeholder = "Description"
ref={nextInput => this.nextInput = nextInput}
/>
如果您恰好像我一样使用tcomb-form-native，您也可以这样做。这里有一个技巧:不是直接设置TextInput的道具，而是通过选项来实现。您可以将表单的字段引用为:
this.refs.form.getComponent('password').refs.input.focus()
所以最终的产品看起来是这样的:
var t = require('tcomb-form-native');
var Form = t.form.Form;
var MyForm = t.struct({
field1: t.String,
field2: t.String,
});
var MyComponent = React.createClass({
_getFormOptions () {
return {
fields: {
field1: {
returnKeyType: 'next',
onSubmitEditing: () => {this.refs.form.getComponent('field2').refs.input.focus()},
},
},
};
},
render () {
var formOptions = this._getFormOptions();
return (
<View style={styles.container}>
<Form ref="form" type={MyForm} options={formOptions}/>
</View>
);
},
});
(感谢remcoanker在这里发布的想法:https://github.com/gcanti/tcomb-form-native/issues/96)
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;
对于RN 0.50.3的我来说，这是可能的:
<TextInput
autoFocus={true}
onSubmitEditing={() => {this.PasswordInputRef._root.focus()}}
/>
<TextInput ref={input => {this.PasswordInputRef = input}} />
你必须看到这个。
在你的组件中:
constructor(props) {
super(props);
this.focusNextField = this
.focusNextField
.bind(this);
// to store our input refs
this.inputs = {};
}
focusNextField(id) {
console.log("focus next input: " + id);
this
.inputs[id]
._root
.focus();
}
注意:我使用了._root，因为它是NativeBase' library ' Input中的TextInput的引用
在文本输入中，像这样
<TextInput
onSubmitEditing={() => {
this.focusNextField('two');
}}
returnKeyType="next"
blurOnSubmit={false}/>
<TextInput
ref={input => {
this.inputs['two'] = input;
}}/>
