uni-app WebSocket持久链接状态监听

// 放入methods里面在 onLoad() 调用即可

connectSocketInit(){
    // 创建一个this.socketTask对象(发送、接收、关闭socket都由这个对象操作)
    let ip = uni.getStorageSync('ip'); //读取缓存里面的IP
	let port = uni.getStorageSync('port');//读取缓存里面的端口号
    uni.connectSocket({
        url: 'ws://'+ip+':'+port,,
        success(data){
            console.log("websocket连接成功",data)
        }
    })
    //监听socket打开
    uni.onSocketOpen(()=>{
        this.is_opensocket=true
        console.log('WebSocket连接已打开！')
        this.connectSocketInit()
    })
    //监听socket关闭
    uni.onSocketClose(()=>{
        this.is_opensocket=false;
        this.connectSocketInit()
        console.log('WebSocket连接已关闭！')
    })
    //监听socket错误
    uni.onSocketError(()=>{
        this.is_opensocket=false
        this.connectSocketInit()
        console.log('WebSocket连接打开失败');
    })
    uni.onSocketMessage((res)=>{
        console.log(res)
    })
    //先确保清除了之前的心跳定时器
    clearInterval(this.pingpangTimes)
        // 每过一段时间发送一次心跳，发送Ping,服务器会反馈pong，这样操作以保持socket一直是连接状态，防止断开连接，心跳停止
        this.pingpangTimes=setInterval(()=>{
            // 心跳传参
            let heartData = {
                type:'is ok',
            }
        uni.sendSocketMessage({
            data: JSON.stringify(heartData),
            success:(res)=>{
               console.log('心跳的返回：',res) 其实监听里面有，或者不返回跟后端，用处不大，可以删除
            },
            fail:(res)=>{
                // console.log(res)
                this.is_opensocket=false
            }
        });
    },50000);
}