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
RN没有某种类型的Tabindex系统，这很令人恼火。
一个功能性组件，对于我的用例，我有一个字符串id数组用于输入，我遍历并显示每个文本输入。下面的代码将自动跳过所有这些，阻止键盘在字段之间消失/重新出现，并在结束时解散它，还在键盘上显示适当的“动作”按钮。
Typescript, Native Base。
const stringFieldIDs = [ 'q1', 'q2', 'q3' ]; export default () => { const stringFieldRefs = stringFieldIDs.map(() => useRef < any > ()); const basicStringField = (id: string, ind: number) => { const posInd = stringFieldIDs.indexOf(id); const isLast = posInd === stringFieldIDs.length - 1; return ( < Input blurOnSubmit = { isLast } ref = { stringFieldRefs[posInd] } returnKeyType = { isLast ? 'done' : 'next' } onSubmitEditing = { isLast ? undefined : () => stringFieldRefs[posInd + 1].current._root.focus() } /> ); }; return stringFieldIDs.map(basicStringField); };
其他回答
我的场景是< CustomBoladonesTextInput />包装一个RN < TextInput />。
我是这样解决这个问题的:
我的表单是这样的:
<CustomBoladonesTextInput
onSubmitEditing={() => this.customInput2.refs.innerTextInput2.focus()}
returnKeyType="next"
... />
<CustomBoladonesTextInput
ref={ref => this.customInput2 = ref}
refInner="innerTextInput2"
... />
在CustomBoladonesTextInput的组件定义中，我像这样将refField传递给内部的ref道具:
export default class CustomBoladonesTextInput extends React.Component {
render() {
return (< TextInput ref={this.props.refInner} ... />);
}
}
瞧。一切恢复正常。 希望这能有所帮助
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>
);
}
});
此处为具有:focus属性的输入组件的试剂溶液。
只要这个道具设置为true，字段就会被聚焦;如果这个道具设置为false，字段就不会有焦点。
不幸的是，这个组件需要定义一个:ref，我找不到其他方法来调用.focus()。我很高兴听到建议。
(defn focusable-input [init-attrs]
(r/create-class
{:display-name "focusable-input"
:component-will-receive-props
(fn [this new-argv]
(let [ref-c (aget this "refs" (:ref init-attrs))
focus (:focus (ru/extract-props new-argv))
is-focused (.isFocused ref-c)]
(if focus
(when-not is-focused (.focus ref-c))
(when is-focused (.blur ref-c)))))
:reagent-render
(fn [attrs]
(let [init-focus (:focus init-attrs)
auto-focus (or (:auto-focus attrs) init-focus)
attrs (assoc attrs :auto-focus auto-focus)]
[input attrs]))}))
https://gist.github.com/Knotschi/6f97efe89681ac149113ddec4c396cc5
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} />
)
}
}
<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();
}
