UITableView does not conform to protocol - swift

Question

Type ‘TVViewController’ does not conform to protocol ‘UITableViewDataSource’
I'm fairly new to programming and the error is very vague so I don't know where to begin troubleshooting.
class WeeksViewController: UIViewController, UITableViewDataSource {
//Categories
var categories = ["One", "Two", "Three", "Four", "Five", "Six", "Seven"]
//Number of sections
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return categories.count
}
//Defining the headers
func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return categories[section]
}
//Number of rows
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
//Cell as identifier & category as the class
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell") as! CategoryRow
return cell
}
}

Answer 1

You copied and pasted Swift 2 code. These are the proper Swift 3+ methods
class WeeksViewController: UIViewController, UITableViewDataSource {
//Categories
var categories = ["One", "Two", "Three", "Four", "Five", "Six", "Seven"]
//Number of sections
func numberOfSections(in tableView: UITableView) -> Int
return categories.count
}
//Defining the headers
func func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return categories[section]
}
//Number of rows
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
//Cell as identifier & category as the class
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", for: indexPath) as! CategoryRow
return cell
}
}
It's always worth it to have a look at the documentation

Answer 2

I think the issue is that you have a misspelling in the name of the numberOfRows data source method and the cellForRow signature is also a bit off.
Instead of these:
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return categories.count
}
...
func func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
//
}
You probably want these:
func numberOfSections(in tableView: UITableView) -> Int {
return categories.count
}
...
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
// code
}