Swift about view does not confirm to protocol "UITableViewDataSource" - ios

Question

class showPageViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
var records : [Record] = []
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return records.count
}
func tableview(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
return UITableViewCell()
}
func tableView(_ tableVoew: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath){
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
if editingStyle == .delete{
let record = records[indexPath.row]
context.delete(record)
(UIApplication.shared.delegate as! AppDelegate).saveContext()
do{
records = try context.fetch(Record.fetchRequest())
} catch{
print("Failed")
}
}
}
override func viewWillAppear(_ animated: Bool) {
getData()
tableView.reloadData()
}
func getData(){
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
do{
records = try context.fetch(Record.fetchRequest())
} catch{
print("123")
}
}
}
This is the code of my program, I am trying to make a to-do list app, but the error does not confirm to protocol "UITableViewDataSource" always appear, I try to find the solution, but nothing suitable for me, is anyone can help me? thanks

Answer 1

You have a mix of Swift 2 and Swift 3 methods in your code. Your cellForRow... method is using the newer Swift 3 signature. You need to use the older Swift 2 compatible version.
I believe it is:
func tableview(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
}
Check all of the other table view data source and delegate methods and make sure they all use the Swift 2 compatible signatures and not the newer Swift 3 signatures.

Answer 2

Yes, You are mixing swift 2 and swift 3. Your methods should be like this:
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return 0
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("reuseIdentifier", forIndexPath: indexPath)
// Configure the cell...
return cell
}
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == .Delete {
// Delete the row from the data source
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
} else if editingStyle == .Insert {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
You have done several spelling mistakes in those methods, Please check above methods with yours