I need a pretty simple thing and I cant figure it out. I created a snapshot of firebase, and i matched the userID with the snapshots name of inside a child. I just need the childs ID (which i created using childbyautoID)
here is my code:
func checkIfUserIsLoggedIn(){
if Auth.auth().currentUser?.uid == nil {
} else {
let uid = Auth.auth().currentUser?.uid
Database.database().reference().child("Users").child(uid!).child("data").observeSingleEvent(of: .value, with: {(snapshot) in
if let dictionary = snapshot.value as? [String:AnyObject] {
self.fnamefinal = dictionary["email"] as? String
if self.fnamefinal != nil {
self.ref.child("Request").observe(.childAdded, with: { (snapshot) in
let results = snapshot.value as? [String : AnyObject]
let name = results?["name"]
let garage = results?["garage"]
let time = results?["time"]
let latitude = results?["latitude"]
let longitude = results?["longitude"]
let childID = results?[""]
print(snapshot)
print(childID as! String?)
if name as! String? == self.fnamefinal {
let myCalls = RidesRequestedd(name: name as! String?, garage: garage as! String?, time: time as! String?, latitude: latitude as! Double?, longitude: longitude as! Double?)
self.frequests1.append(myCalls)
self.rideslabel.text = myCalls.garage
} else {
}
})
} else {
print("no")
}
}
})
//}
}
Here is the snapshot of the matched name with user ID:
Snap (-LMBAF69-kYKnWoK2n9M) {
garage = "Coliseum/Bobcat Stadium";
latitude = "29.89";
longitude = "-97.953";
name = "test3#gmail.com";
time = "12:13 AM";
}
I just need the LMBAF69.... string. Simple but i cant figure it out
Related
My ultimate goal is to display annotations on a Map from MapKit. However, loading data from firebase does not work.
Here is the code:
var hotels = [Hotel]()
override func viewDidLoad() {
super.viewDidLoad()
map.delegate = self
checkLocationServices()
observe()
}
The function observe is the following:
func observe() {
Data().getAllHotel { (hotelA) -> (Void) in
if let hotel = hotelA {
print("hotel: ", hotel)
self.hotels.append(hotel)
let hotelAnnotation = MKPointAnnotation()
hotelAnnotation.title = "\(hotel.hotelName)"
hotelAnnotation.coordinate = CLLocationCoordinate2D(latitude: hotel.latitude, longitude: hotel.longitude)
self.map.addAnnotation(hotelAnnotation)
}
}
}
Note that the print in the if statement is not empty.
However the line hotelAnnotation.title causes a bug unexpected nil and I don't understand why.
Additionnally here is the getAllHotel function inside the Data class:
func getAllHotel(closure: HotelClosure?) {
let ref = Ref().databaseHotels
ref.observe(.childAdded) { (snapshot) in
if let dict = snapshot.value as? Dictionary<String, AnyObject> {
let hotel = self.fromDictToHotel(key: snapshot.key, dict: dict)
closure?(hotel)
} else {
closure?(nil)
}
}
}
func fromDictToHotel(key: String, dict: Dictionary<String, AnyObject>) -> Hotel? {
guard let hotelName = dict["name"] as? String else { return nil }
guard let latitude = dict["latitude"] as? Double else { return nil }
guard let longitude = dict["longitude"] as? Double else { return nil }
let hotelDescription = dict["description"] as? String
let hotelGrade = dict["grade"] as? Double
let hotelImageUrl = dict["hotelImageUrl"] as? String
let hotel = Hotel(hid: key, hotelName: hotelName, hotelDescription: hotelDescription, latitude: latitude, longitude: longitude, grade: hotelGrade, url: hotelImageUrl)
return hotel
}
Thanks in advance for your help!
I've been trying to filter data by a string array within firebase to return only the filtered values but the app crashes when I try to run the function. Is this the way it should be done? (The function isn't called if the array is empty)
func fetchFilteredActivities() {
let ref = Database.database().reference().child("posts").queryOrdered(byChild: "category").queryEqual(toValue: filterList)
ref.observe(.childAdded) { (snapshot) in
guard let dictionary = snapshot.value as? [String: Any] else { return }
guard let uid = dictionary["uid"] as? String else { return }
guard let latitudeString = dictionary["latitude"] as? String else { return }
guard let longitudeString = dictionary["longitude"] as? String else { return }
let latitude = (latitudeString as NSString).doubleValue
let longitude = (longitudeString as NSString).doubleValue
Database.fetchUserWithUID(uid: uid, completion: { (user) in
guard let dictionary = snapshot.value as? [String: Any] else { return }
var post = Post(postId: snapshot.key, user: user, dictionary: dictionary)
let postId = snapshot.key
post.id = snapshot.key
let coords = [CLLocation(latitude: latitude, longitude: longitude)]
self.addAnnotation(post: post, title: post.category, subtitle: nil, coords: coords)
})
}
}
The error:
libc++abi.dylib: terminating with uncaught exception of type NSException
I am having trouble putting annotations on my map from longitudinal and latitudinal degrees I uploaded to firebase. I want to add an annotation for all of my users but cannot get xcode to recognize my userLatitude and userLongitude variables in another function.
Anything will help!
func retrieveUsers(){
let ref = Database.database().reference()
ref.child("users").queryOrderedByKey().observeSingleEvent(of: .value, with: { snapshot in
let users = snapshot.value as! [String: AnyObject]
self.user.removeAll()
for (_,value) in users {
if let uid = value["uid"] as? String {
if uid != Auth.auth().currentUser!.uid {
let userToShow = User()
if let fullName = value["full name"] as? String,
let imagePath = value["urlToImage"] as? String,
//String(format: "%f", self.currentUserLocation?.longitude ?? 0),
let userLongitude = value["long"] as? CLLocationDegrees,
let userLatitude = value["lat"] as? CLLocationDegrees
//why isnt it recognizing the users degrees
{
userToShow.fullName = value["full name"] as? String
userToShow.imagePath = value["urlToImage"] as? String
userToShow.userID = value["uid"] as? String
userToShow.userLongitude = value["long"] as? CLLocationDegrees
userToShow.userLatitude = value["lat"] as? CLLocationDegrees
self.user.append(userToShow)
}
}
}
}
DispatchQueue.main.async {
self.map.reloadInputViews()
//not sure if this is right
}
})
}
func mapView(_ mapView: MKMapView, didAdd views: [MKAnnotationView]) {
let otherUserLocation: CLLocationCoordinate2D = CLLocationCoordinate2DMake(userLatitude, userLongitude)
let userAnnotation = MKPointAnnotation()
userAnnotation.coordinate = otherUserLocation
userAnnotation.title = "fullName"
}
And if you change as? CLLocationDegrees by as? String and manage the cast in CLLocationDegrees afterwards?
Because I think, in Firebase, data is stored as String and not as Double (that is the type of data a CLLocationDegrees type is referring to).
Hi there i'm newest in swift. I am working with a firebase database with at 2 layer of hierarchy as well as many children for each node. I got 1st layer (descript, enddata and other), but i stll can't get the news node. Is in 3 to 5 random keys. I sow many issues but still not have issue for me.
I'm understand i'm doing some wrong but what?
The Firebase is:
i need retreat the news child
struct is
struct ICONews {
let ICOId: String
let news1: String
let news2: String
let news3: String
init?(ICOId: String, dict: [String: Any] ) {
self.ICOId=ICOId
guard let news1 = dict[""] as? String,
let news2 = dict[""] as? String,
let news3 = dict[""] as? String
else { return nil }
self.news1 = news1
self.news2 = news2
self.news3 = news3
}
}
struct NewsSnapShot {
let posts: [ICONews]
init?(with snapshot: DataSnapshot) {
var posts = [ICONews] ()
guard let snapDict = snapshot.value as? [String: [String: Any]] else { return nil }
for snap in snapDict {
guard let post = ICONews (ICOId: snap.key, dict: snap.value) else {continue}
posts.append(post)
}
self.posts=posts
}
}
class of DataBase
class DatabaseService {
static let shared = DatabaseService()
private init(){}
let ICOReference = Database.database().reference()
}
and retreat method
DatabaseService.shared.ICOReference.child("news").observe(DataEventType.value, with: { (snapshot) in
guard let postsSnapShot = ICOSnapShot(with: snapshot) else {return}
})
done
Database.database().reference().observeSingleEvent(of: .value, with: {(snapshot) in
let enumerator = snapshot.children
while let rest = enumerator.nextObject() as? DataSnapshot {
let values = (rest as! DataSnapshot).value as? NSDictionary
let enumeratorMap1 = (rest as! DataSnapshot).children
while let rest2 = enumeratorMap1.nextObject() as? DataSnapshot {
let valuesMap1 = (rest2 as! DataSnapshot).value as? NSDictionary
if (rest2 as! DataSnapshot).key == "news" {
print(rest2.value)
}
}
}
})
Make the the Firebase Api call like
Database.database().reference().child("users").child(userID).observe(.childAdded, with: { (snapshot) in
if snapshot.exists() {
let receivedMessage = snapshot.value as! [String: Any]
let name = receivedMessage["name"] as? String ?? ""
let id = receivedMessage["id"] as? Double ?? 0.0
let profileurl = receivedMessage["url"] as? String ?? ""
completion(User(name: name, id: id, url: url))
} else {
failure()
}
})
I want to be able to access the results array, after all the data has been added from Firebase to my array. Every time I try this, I get nil array.
Objective is to have a list of location info objects in an array, loaded through Firebase.
My code snippet:
class func loadData(){
let root = FIRDatabase.database().reference()
let locationSummary = root.child("LocSummary")
locationSummary.observe(.childAdded,with: { (snapshot) in
print("inside closure")
let values = snapshot.value as? NSDictionary
let name = values?["Name"] as? String ?? ""
let rating = values?["Rating"] as? Int
let latitude = values?["Latitude"] as? Double
let longitude = values?["Longitude"] as? Double
let musicType = values?["Music"] as? String ?? ""
let loc = LocationInfo.init(name: name, rating: rating!, lat:
latitude!, long: longitude!, musicTyp: musicType)
resultsArray.append(loc)
})
}
Try something like this:
class func loadData(completion: #escaping (_ location: LocationInfo) -> Void) {
let root = FIRDatabase.database().reference()
let locationSummary = root.child("LocSummary")
locationSummary.observe(.childAdded,with: { (snapshot) in
print("inside closure")
let values = snapshot.value as? NSDictionary
let name = values?["Name"] as? String ?? ""
let rating = values?["Rating"] as? Int
let latitude = values?["Latitude"] as? Double
let longitude = values?["Longitude"] as? Double
let musicType = values?["Music"] as? String ?? ""
let loc = LocationInfo.init(name: name, rating: rating!, lat:
latitude!, long: longitude!, musicTyp: musicType)
completion(loc)
})
}
In your cycle add something like this:
func getArray(completion: #escaping (_ yourArray: [LocationInfo]) -> Void {
var resultsArray = [LocationInfo]()
let countOfLoadedItems = 0
for item in yourArrayForCycle { // or your own cycle. Implement your logic
loadData(completion: { location in
countOfLoadedItems += 1
resultsArray.append(location)
if countOfLoadedItems == yourArrayForCycle.count {
completion(resultsArray)
}
})
}
}
Then in function, where you wants your data:
getArray(completion: { result in
yourArrayToFill = result
// reload data etc..
})
Something like this. Adapt it to your solution.
Hope it helps