0
如何在設備斷開連接前向Firebase寫入信息，如果用戶斷開與互聯網的連接，我試圖更新Firebase上的值。林不知道是否有方法可以做到這一點。我搜索並找到了onDisconnect，但只有當用戶註銷時纔有所幫助。如果有任何建議，將不勝感激。如果用戶與互聯網斷開連接，Firebase會更新Firebase上的值
func isUserLoggedInSaved(){
if let user = FIRAuth.auth()?.currentUser {
if !user.isAnonymous {
let path = "rquest/frontEnd/users/\(self.currentUserId()!)"
let connectedRef = FIRDatabase.database().reference(withPath: ".info/connected")
let presenceRef = FIRDatabase.database().reference(withPath: path).child("isUserLogon")
presenceRef.onDisconnectSetValue(false, withCompletionBlock: { (err, fir) in
print("Disconnected")
})
connectedRef.observe(.value, with: { snapshot in
if let connected = snapshot.value as? Bool, connected {
self.childRef(path).updateChildValues(["isUserLogon":true])
print("connectedssss")
return
}else{
print("not connected anymore ")
if #available(iOS 10.0, *) {
Timer.scheduledTimer(withTimeInterval: 3, repeats: false, block: { (timer) in
self.navAlertCustom(viewType: .StatusLine, theme: Theme.warning, duration: 10, location: .top, message: "No Internet Connection", dimBg: false)
})
})
} else {
// Fallback on earlier versions
}
}
})
}
}
}