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
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
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>
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;
}}/>
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); };
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" />
...
