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
如果你正在使用NativeBase作为UI组件，你可以使用这个示例
<Item floatingLabel>
<Label>Title</Label>
<Input
returnKeyType = {"next"}
autoFocus = {true}
onSubmitEditing={(event) => {
this._inputDesc._root.focus();
}} />
</Item>
<Item floatingLabel>
<Label>Description</Label>
<Input
getRef={(c) => this._inputDesc = c}
multiline={true} style={{height: 100}} />
onSubmitEditing={(event) => { this._inputLink._root.focus(); }} />
</Item>
我想分享我的解决方案使用功能组件…“这个”不需要!
React 16.12.0和React Native 0.61.5
这是我的组件的一个例子:
import React, { useRef } from 'react'
...
const MyFormComponent = () => {
const ref_input2 = useRef();
const ref_input3 = useRef();
return (
<>
<TextInput
placeholder="Input1"
autoFocus={true}
returnKeyType="next"
onSubmitEditing={() => ref_input2.current.focus()}
/>
<TextInput
placeholder="Input2"
returnKeyType="next"
onSubmitEditing={() => ref_input3.current.focus()}
ref={ref_input2}
/>
<TextInput
placeholder="Input3"
ref={ref_input3}
/>
</>
)
}
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
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}
/>
}
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/