我使用Firebase脱机功能，尤其是使用它来确定用户上次在线或何时在线。在测试过程中，我遇到了这样的问题：即使我不注销，也无法注销功能，但是如果我注销，则Disconnect功能将不起作用。我了解在注销之前，我可以自己发送此数据，但是此功能的含义将从框中消失。告诉我该如何解决？
该函数确定用户的活动，我将其MainTabBarController称为（用作根控制器）
func setupLastSeenActivity() {
DispatchQueue.main.async {
let realmManager = RealmManager()
guard let currentUserID = realmManager.getCurrentUser()?.id else { return }
DispatchQueue.global(qos: .background).async {
let ref = Database.database().reference().child(MainGateways.users.rawValue).child(currentUserID)
let userSearchLocationRef = Database.database().reference().child(UserSearchLocationKeys.userSearchLocationModel.rawValue).child(currentUserID)
let parameters = [UserSubgateways.isOnline.rawValue : true]
ref.updateChildValues(parameters, withCompletionBlock: { (error, ref) in
})
userSearchLocationRef.updateChildValues(parameters, withCompletionBlock: { (error, ref) in
})
let disconnectParameters = [UserSubgateways.isOnline.rawValue : false, UserSubgateways.lastSeenTimeStamp.rawValue : ServerValue.timestamp()] as [String : Any]
ref.onDisconnectUpdateChildValues(disconnectParameters, withCompletionBlock: { (error, ref) in
guard let _error = error else { return }
debugPrint(_error.localizedDescription)
})
userSearchLocationRef.onDisconnectUpdateChildValues(disconnectParameters, withCompletionBlock: { (error, ref) in
guard let _error = error else { return }
debugPrint(_error.localizedDescription)
})
}
}
}
来自的注销功能 FirebaseAuthManager
func logOut(completion: (() -> Void)?) {
DispatchQueue.main.async {
do {
let pushNotificationManager = PushNotificationManager()
pushNotificationManager.unregisterPushNotification()
pushNotificationManager.removeTokenWhenLogOut(success: nil)
// Observers
FIRFriendsDatabaseManager.shared.observeNewFriend(false, success: nil, fail: nil)
FIRFriendsDatabaseManager.shared.observeFriendRemoved(false, success: nil, fail: nil)
let firChatCardManager = FIRChatCardManager()
firChatCardManager.syncChatCardModels(false)
FacebookManager.logOut()
Database.database().reference().removeAllObservers()
let firebaseGeneralDatabaseManager = FirebaseDatabaseGeneralManager()
firebaseGeneralDatabaseManager.logOut()
try Auth.auth().signOut()
let realmManager = RealmManager()
realmManager.logOut()
let appManager = AppManager()
appManager.logOut(isDeleteAccount: false, completion: completion)
} catch {
debugPrint(error.localizedDescription)
}
}
}
我做了一个计算连接设备数量的云函数，如果连接设备数量为0，则将值设置为isOnline = false并设置lastSeenTimeStamp
const functions = require('firebase-functions');
const admin = require('firebase-admin');
module.exports = functions.database.ref('userOnlineDevices/{userID}/{onlineSystemModelID}')
.onWrite(event => {
const snapshot = event.data;
const userID = event.params.userID;
const onlineSystemModelID = event.params.onlineSystemModelID;
const currentData = event.data.current;
const previousData = event.data.previous;
console.log("currentData.val()", currentData.val(), "previousData.val()", previousData.val());
if (currentData.val() && !previousData.val()) {
// value created
const checkUserRef = admin.database().ref("users").child(userID);
const checkUserRefPromise = checkUserRef.once("value", function(checkUserRefSnap, error) {
if (error) {
return console.log("created checkUserRefPromise error", error);
}
if (checkUserRefSnap.val()) {
const checkUserID = checkUserRefSnap.val()["id"];
if (checkUserID == null) {
return console.log("checkUserID == null")
} else {
console.log("checkUserID", checkUserID)
}
const recentActivityTimeStamp = Math.floor(Date.now() / 1000);
const userRef = admin.database().ref("users").child(userID);
const userRefPromise = userRef.update({
"isOnline": true
});
const userSearchLocationModelRef = admin.database().ref("userSearchLocationModel").child(userID);
const userSearchLocationModelRefPromise = userSearchLocationModelRef.update({
"isOnline": true,
"recentActivityTimeStamp": recentActivityTimeStamp
});
return Promise.all([userRefPromise, userSearchLocationModelRefPromise]);
} else {
return console.log("checkUserRefSnap.val() == null")
}
});
return Promise.all([checkUserRefPromise]);
} else if (!currentData.val() && previousData.val()) {
// value removed
const checkUserRef = admin.database().ref("users").child(userID);
const checkUserRefPromise = checkUserRef.once("value", function(checkUserRefSnap, error) {
if (error) {
return console.log(error);
}
if (checkUserRefSnap.val()) {
const checkUserID = checkUserRefSnap.val()["id"];
if (checkUserID == null) {
return console.log("checkUserID == null")
} else {
console.log("checkUserID", checkUserID)
}
if (userID) {
const removedTimeStamp = new Date() / 1000;
const userRef = admin.database().ref("users").child(userID);
const userRefPromise = userRef.update({
"isOnline": false,
"lastSeenTimeStamp": removedTimeStamp
});
const userSearchLocationModelRef = admin.database().ref("userSearchLocationModel").child(userID);
const userSearchLocationModelRefPromise = userSearchLocationModelRef.update({
"isOnline": false,
"lastSeenTimeStamp": removedTimeStamp
});
return Promise.all([userRefPromise, userSearchLocationModelRefPromise]);
} else {
return console.log("removed, userID == null");
}
} else {
return console.log("removed, checkUserRefSnap.val() == null");
}
});
return Promise.all([checkUserRefPromise]);
} else {
// updated
const checkUserRef = admin.database().ref("users").child(userID);
const checkUserRefPromise = checkUserRef.once("value", function(checkUserRefSnap, error) {
if (error) {
return console.log(error);
}
if (checkUserRefSnap.val()) {
const checkUserID = checkUserRefSnap.val()["id"];
if (checkUserID == null) {
return console.log("checkUserID == null")
} else {
console.log("checkUserID", checkUserID)
}
const recentActivityTimeStamp = Math.floor(Date.now() / 1000);
const userRef = admin.database().ref("users").child(userID);
const userRefPromise = userRef.update({
"isOnline": true
});
const userSearchLocationModelRef = admin.database().ref("userSearchLocationModel").child(userID);
const userSearchLocationModelRefPromise = userSearchLocationModelRef.update({
"isOnline": true,
"recentActivityTimeStamp": recentActivityTimeStamp
});
return Promise.all([userRefPromise, userSearchLocationModelRefPromise]);
} else {
return console.log("updated checkUserRefSnap.val() == null");
}
});
return Promise.all([checkUserRefPromise]);
}
});
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