这篇文章主要介绍了ReactNative之键盘Keyboard弹出与消失的示例分析，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。
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-native';
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 (
<TextInput
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`
- `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
dismiss () {
dismissKeyboard();
}我们如果需要使用时，可以如下：
const dismissKeyboard = require('dismissKeyboard');
dismissKeyboard();感谢你能够认真阅读完这篇文章，希望小编分享的“ReactNative之键盘Keyboard弹出与消失的示例分析”这篇文章对大家有帮助，同时也希望大家多多支持编程网，关注编程网行业资讯频道，更多相关知识等着你来学习!
