Missing argument for parameter in call - ios

Question

New to swift (3) and Xcode (8) and I'm using firebase to load some data in a tableView . When I try to build the app, I get the error: "Missing argument for parameter name in call" in my fetchWhiskey function on the line when I call an instance of WhiskeyItem. I can't figure out why this error is happening. can anyone help me out?
Here's my class:
import UIKit
class WhiskeyItem {
let wName: String
let wType: String
init(wName: String, wType: String) {
self.wName = wName
self.wType = wType
}
}
and here's the tableView that I'm trying to load the data in:
import UIKit
import Firebase
import FirebaseDatabase
class FirstViewTableViewController: UITableViewController, UISearchBarDelegate {
let whiskeySearchBar = UISearchBar()
var ref: FIRDatabaseReference?
var refHandle: UInt!
var whiskeyList = [WhiskeyItem]()
let cell = "cell"
override func viewDidLoad() {
super.viewDidLoad()
createWhiskeySearchBar()
//Display Firebase whiskey data:
ref = FIRDatabase.database().reference()
fetchWhiskey()
}
func createWhiskeySearchBar() {
whiskeySearchBar.showsCancelButton = false
whiskeySearchBar.placeholder = "Search whiskeys"
whiskeySearchBar.delegate = self
self.navigationItem.titleView = whiskeySearchBar
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return whiskeyList.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
// Configure the cell...
cell.textLabel?.text = whiskeyList[indexPath.row].wName
return cell
}
func fetchWhiskey() {
refHandle = ref?.child("whiskey").observe(.childAdded, with: { (snapshot) in
if let dictionary = snapshot.value as? [String : AnyObject] {
print(dictionary)
let whiskeyItemInstance = WhiskeyItem()
whiskeyItemInstance.setValuesForKeys(dictionary)
self.whiskeyList.append(whiskeyItemInstance)
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
})
}

Answer 1

Your initializer has two parameters which are required when calling it.
Calling it properly would look something like this:
let whiskeyItemInstance = WhiskeyItem(wName: "name", wType: "type")
If you don't want to pass parameters to the initializer, you could provide default params:
init(wName: String = "default name", wType: String = "default type") {
or use an initializer with no parameters at all:
init() {
self.wName = "wName"
self.wType = "wType"
}
or call the initializer you already created like so:
convenience init() {
self.init(wName: "default name", wType: "default type")
}
Or you could forgo initializers altogether:
class WhiskeyItem {
let wName: String = "asdf"
let wType: String = "asdf"
}