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!
设置第二个TextInput焦点,当前一个TextInput的onSubmitEditing被触发时。
试试这个
为第二个TextInput添加一个引用
Ref ={(input) => {this。secondTextInput =输入;}}
绑定焦点函数到第一个TextInput的onSubmitEditing事件。
onSubmitEditing={() => {this.secondTextInput.focus();}}
记住将blurOnSubmit设置为false,以防止键盘闪烁。
blurOnSubmit ={假}
当一切都完成后,它应该看起来像这样。
<TextInput
placeholder="FirstTextInput"
returnKeyType="next"
onSubmitEditing={() => { this.secondTextInput.focus(); }}
blurOnSubmit={false}
/>
<TextInput
ref={(input) => { this.secondTextInput = input; }}
placeholder="secondTextInput"
/>
结合@Eli Johnson的功能组件解决方案和@Rodrigo Tessarollo的CustomTextInput解决方案:
import React, { useRef } from 'react';
import { CustomTextInput } from 'path/to/CustomTextInput';
...
export const MyFormComponent = () => {
const ref_to_input2 = useRef();
return (
<>
<CustomTextInput
placeholder="Input 1"
autoFocus={true}
returnKeyType="next"
onSubmitEditing={() => ref_to_input2.current.focus()}
/>
<CustomTextInput
placeholder="Input 2"
returnKeyType="done"
refInner={ref_to_input2}
onSubmitEditing={/* Do something! */}
/>
</>
)
}
在你的CustomTextInput组件中:
import { TextInput } from "react-native";
export const CustomTextInput = (props) => {
<TextInput
ref={props.refInner}
{...props}
/>
}
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" />
...
有一种方法可以捕获TextInput中的制表符。这很俗气,但总比没有好。
定义一个onChangeText处理程序,比较新输入值和旧输入值,检查是否有\t。如果找到一个,推进字段如@boredgames所示
假设变量username包含用户名的值,setUsername在存储(组件状态,redux存储等)中分派一个动作来更改它,执行如下操作:
function tabGuard (newValue, oldValue, callback, nextCallback) {
if (newValue.indexOf('\t') >= 0 && oldValue.indexOf('\t') === -1) {
callback(oldValue)
nextCallback()
} else {
callback(newValue)
}
}
class LoginScene {
focusNextField = (nextField) => {
this.refs[nextField].focus()
}
focusOnPassword = () => {
this.focusNextField('password')
}
handleUsernameChange = (newValue) => {
const { username } = this.props // or from wherever
const { setUsername } = this.props.actions // or from wherever
tabGuard(newValue, username, setUsername, this.focusOnPassword)
}
render () {
const { username } = this.props
return (
<TextInput ref='username'
placeholder='Username'
autoCapitalize='none'
autoCorrect={false}
autoFocus
keyboardType='email-address'
onChangeText={handleUsernameChange}
blurOnSubmit={false}
onSubmitEditing={focusOnPassword}
value={username} />
)
}
}