问题
Can any one help me to detect internet connection with Firebase Database using Swift 3? I am using this function to download data from database.
func loadData(){
Ref=FIRDatabase.database().reference()
Handle = Ref?.child("Posts").queryOrdered(byChild: "Des").queryEqual(toValue: "11").observe(.childAdded ,with: { (snapshot) in
if let post = snapshot.value as? [String : AnyObject] {
let img = Posts()
img.setValuesForKeys(post)
self.myarray.append(img)
self.tableView.reloadData()
}else {
}
})
}
回答1:
If you want to detect whether your app has a connection to the Firebase Database backend, you can listen for /.info/connected. This example from the Firebase documentation on detecting connection state should do the trick:
let connectedRef = FIRDatabase.database().referenceWithPath(".info/connected")
connectedRef.observeEventType(.Value, withBlock: { snapshot in
if let connected = snapshot.value as? Bool where connected {
print("Connected")
} else {
print("Not connected")
}
})
Swift 3.1
let connectedRef = FIRDatabase.database().reference(withPath: ".info/connected")
connectedRef.observe(.value, with: { snapshot in
if let connected = snapshot.value as? Bool, connected {
print("Connected")
} else {
print("Not connected")
}
})
Objective C
FIRDatabaseReference *connectedRef = [[FIRDatabase database] referenceWithPath:@".info/connected"];
[connectedRef observeEventType:FIRDataEventTypeValue withBlock:^(FIRDataSnapshot *snapshot) {
if([snapshot.value boolValue]) {
NSLog(@"connected");
} else {
NSLog(@"not connected");
}
}];
来源：https://stackoverflow.com/questions/41661137/how-to-detect-internet-connection-with-firebase-database-using-swift3