ReactNative之键盘Keyboard的弹出与消失示例

ReactNative之键盘Keyboard的弹出与消失示例

在开发中经常遇到需要输入的地方，所以就学习了一下ReactNative键盘Keyboard的弹出与消失的方法，留个笔记。

今天我们来说下RN对键盘事件的支持。

在React-native 的Component组件中有个Keyboard.

github地址如下：https://github.com/facebook/react-native/tree/770091f3c13f7c1bd77c50f979d89a774001fbf0/Libraries/Components/Keyboard

我们先来看下官方提供的例子，监听键盘的弹出与消失。Demo如下：

import React, { Component } from 'react';

import { Keyboard, TextInput } from 'react-nativeVKgzPw';

class Example extends Component {

componentWillMount () {

this.keyboardDidShowListener = Keyboard.addListener('keyboardDidShow', this._keyboardDidShow);

this.keyboardDidHideListener = Keyboard.addListener('keyboardDidHide', this._keyboardDidHide);

}

componentWillUnmount () {

this.keyboardDidShowListener.remove();

this.keyboardDidHideListener.remove();

}

_keyboardDidShow () {

alert('Keyboard Shown');

}

_keyboardDidHide () {

alert('Keyboard Hidden');

}

render() {

return (

onSubmitEditing={Keyboard.dismiss}

/>

);

}

}

Keyboard支持的监听事件如下：

@param {string} nativeEvent The `nativeEvent` is the string that identifies the event you're listening for. This can be any of the following:

- `keyboardWillShow`

- `keyboardDidShow`

- `keyboardWillHide`

- `keyboardDidHide`

- VKgzPw`keyboardWillChangeFrame`

- `keyboardDidChangeFrame`

使用的时候需要测试下android和iOS下监听的事件是否都ok。

踩坑如下：

android 对keyboardWillShow 监听不到。

同样，我们在源码里可以找到使键盘消失的函数

/**

* Dismisses the active keyboard and removes focus.

*/

dismiss () {

dismissKeyboard();

}

我们如果需要使用时，可以如下：

const dismissKeyboard = require('dismissKeyboard');

dismissKeyboard();

onSubmitEditing={Keyboard.dismiss}

/>

);

}

}

Keyboard支持的监听事件如下：

@param {string} nativeEvent The `nativeEvent` is the string that identifies the event you're listening for. This can be any of the following:

- `keyboardWillShow`

- `keyboardDidShow`

- `keyboardWillHide`

- `keyboardDidHide`

- VKgzPw`keyboardWillChangeFrame`

- `keyboardDidChangeFrame`

使用的时候需要测试下android和iOS下监听的事件是否都ok。

踩坑如下：

android 对keyboardWillShow 监听不到。

同样，我们在源码里可以找到使键盘消失的函数

/**

* Dismisses the active keyboard and removes focus.

*/

dismiss () {

dismissKeyboard();

}

我们如果需要使用时，可以如下：

const dismissKeyboard = require('dismissKeyboard');

dismissKeyboard();

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