Firebase云消息传递无法检索实例ID

Question

这是关于Stack Overflow的第一个问题！

我正在尝试使用＆＃39;在firebase服务器上部署我的firebase应用程序。 firebase部署＆＃39;命令。在运行＆＃34;消息传递＆＃34;示例[由Firebase提供]在我的本地计算机上，生成实例ID没有问题。但是，当我在Firebase服务器上部署应用程序并在浏览器中运行应用程序时，应用程序无法从FCM服务器检索实例ID。这是我从Chrome控制台获得的响应片段：

No Instance ID token available. Request permission to generate one.
(index):226 Requesting permission...
(index):239 Unable to get permission to notify.  V
(index):226 Requesting permission...
(index):239 Unable to get permission to notify.  V {code: 

    "messaging/permission-blocked", 
    message: "Messaging: The required permissions were not grant… blocked instead. (messaging/permission-blocked)."}
code: "messaging/permission-blocked"message: "Messaging: The required permissions were not granted and blocked instead. (messaging/permission-blocked)."stack: (...) ....

Answer 1

看起来你没有request permission to receive notifications：

  

方法messaging.requestPermission()会显示一个同意对话框，允许用户授予您的应用在浏览器中接收通知的权限。如果权限被拒绝，则FCM注册令牌请求会导致错误。

messaging.requestPermission()
.then(function() {
  console.log('Notification permission granted.');
  // TODO(developer): Retrieve a Instance ID token for use with FCM.
  // ...
})
.catch(function(err) {
  console.log('Unable to get permission to notify. ', err);
});