Firestore- Showing data in Tableview - ios

Question

I am attempting to show my Firestore data into my Tableview but I can't seem to get it to show up.
protocol DocumentSerializeable {
init?(dictionary:[String:Any])
}
struct Sourse {
var name: String
var content: String
var timeStamp: Date
var dictionary: [String: Any] {
return [
"name": name,
"content": content,
"timestamp": timeStamp
]
}
}
extension Sourse : DocumentSerializeable {
init?(dictionary: [String : Any]) {
guard let name = dictionary["name"] as? String,
let content = dictionary["content"] as? String,
let timeStamp = dictionary["timeStamp"] as? Date else {return nil}
self.init(name: name, content: content, timeStamp: timeStamp)
}
}
class SourseListTableViewController: UITableViewController {
var db: Firestore!
var sourseArray = [Sourse]()
private var document: [DocumentSnapshot] = []
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.delegate = self
self.tableView.dataSource = self
//initalize Database
db = Firestore.firestore()
loadData()
}
At first I tried this code below, there were no errors but nothing loaded in the tableview.
func loadData() {
db.collection("sourses").getDocuments() {
snapshot, error in
if let error = error {
print("\(error.localizedDescription)")
} else {
self.sourseArray = snapshot!.documents.flatMap({Sourse(dictionary: $0.data())})
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
}
}
After some research (reading from Firestore - Append to tableView when view is loaded ) I tried this code below, but I get the error "Cannot convert value of type '(name: String, content: String, timeStamp: Date?)' to expected argument type 'Sourse'" So I tried it with the date removed from all the code and I still couldn't get it to work.
func loadData() {
db.collection("sourses").getDocuments() {
snapshot, error in
if let error = error {
print("\(error.localizedDescription)")
} else {
for document in snapshot!.documents {
let data = document.data()
let name = data["name"] as? String ?? ""
let content = data["content"] as? String ?? ""
let timeStamp = data["timeStamp"] as? Date
let newSourse = (name:name, content:content, timeStamp: timeStamp)
self.sourseArray.append(newSourse)
}
}
}
}
Here is my numberOfRows/CellForRow to make sure its not the tableview itself. I've also double checked the "cell identifier" with my storyboard.
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return sourseArray.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "SourseTableViewCell", for: indexPath)
let sourse = sourseArray[indexPath.row]
cell.textLabel?.text = "\(sourse.name)"
cell.detailTextLabel?.text = "\(sourse.content)"
return cell
}

Answer 1

You need to reload your tableView after parsing your Snapshot. It is also not a good idea to force unwrap your Snapshot:
.getDocuments { (snapshot, error) in
if let error = error {
print(error.localizedDescription)
} else {
if let snapshot = snapshot {
for document in snapshot.documents {
let data = document.data()
let name = data["name"] as? String ?? ""
let content = data["content"] as? String ?? ""
let timeStamp = data["timeStamp"] as? Date ?? Date()
let newSourse = Sourse(name:name, content:content, timeStamp: timeStamp)
self.sourseArray.append(newSourse)
}
self.tableView.reloadData()
}
}

Answer 2

rbaldwin talked me through it, his answer is correct, I'm just posting the full loaddata function for the record.
func loadData() {
db.collection("sourses").getDocuments() { (snapshot, error) in
if let error = error {
print(error.localizedDescription)
} else {
if let snapshot = snapshot {
for document in snapshot.documents {
let data = document.data()
let name = data["name"] as? String ?? ""
let content = data["content"] as? String ?? ""
let timeStamp = data["timeStamp"] as? Date ?? Date()
let newSourse = Sourse(name:name, content:content, timeStamp: timeStamp)
self.sourseArray.append(newSourse)
}
self.tableView.reloadData()
}
}
}
}