Question

我正在使用Angular，并尝试使用websocket从服务器获取数据。我正在从服务器接收数据，但是当我尝试使用接收到的数据时，它将发送null而不是等待服务器发送数据。示例：

this.wsService.createObservableSocket(environment.webSocketUrl).subscribe(data=>{
   console.log("data received !");
   this.messageFromServer = data;
});

//This happens before the data is received from the server.
// How do i make sure that this only occurs after data is received from server or
// whenever data is received from server

this.DoSomething(this.messageFromServer);

Answer 1

仅在收到数据后致电DoSomething()。

尝试这样：

this.wsService.createObservableSocket(environment.webSocketUrl).subscribe(data=>{
  console.log("data received !");
  this.messageFromServer = data;
  this.DoSomething(this.messageFromServer);
});

从Websocket收到的数据

1 个答案: