vue mqtt断开重连
时间: 2023-12-23 17:28:32 浏览: 64
在Vue中实现MQTT断开重连的方法如下:
1. 首先,安装mqtt库:
```shell
npm install mqtt
```
2. 在main.js中引入mqtt库,并创建一个全局的mqtt实例:
```javascript
import mqtt from 'mqtt'
// 创建mqtt实例
const mqttClient = mqtt.connect('mqtt://broker.emqx.io')
```
3. 在Vue的store中定义一个mutation,用于处理MQTT连接和断开:
```javascript
// store/index.js
import { createStore } from 'vuex'
const store = createStore({
state: {
mqttConnected: false,
mqttClient: null
},
mutations: {
MQTT_CONNECT(state) {
// 连接mqtt
state.mqttClient = mqtt.connect('mqtt://broker.emqx.io')
state.mqttConnected = true
// 监听连接状态
state.mqttClient.on('connect', () => {
console.log('MQTT connected')
})
// 监听断开连接状态
state.mqttClient.on('close', () => {
console.log('MQTT disconnected')
state.mqttConnected = false
// 断开连接后进行重连
setTimeout(() => {
state.mqttClient.reconnect()
}, 5000)
})
},
MQTT_DISCONNECT(state) {
// 断开mqtt连接
if (state.mqttClient) {
state.mqttClient.end()
state.mqttClient = null
state.mqttConnected = false
}
}
}
})
export default store
```
4. 在Vue组件中使用mqtt连接和断开:
```vue
<template>
<div>
<!-- 组件内容 -->
</div>
</template>
<script>
import { onMounted, defineComponent, onUnmounted } from 'vue'
import { useStore } from 'vuex'
export default defineComponent({
setup() {
const store = useStore()
onMounted(() => {
// 启动mqtt连接
store.commit('MQTT_CONNECT')
})
onUnmounted(() => {
// 关闭页面时断开mqtt连接
store.commit('MQTT_DISCONNECT')
})
}
})
</script>
```
这样,当页面加载时,会自动连接MQTT,并在断开连接后进行重连。在页面销毁时,会断开MQTT连接。
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