类型“ ViewController”不符合协议“ UITableViewDataSource”

Question

import UIKit

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

    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.
    }

    var alphNames = ["ABC","DEF","GHI","JKL","MNO","PQR","STU"]

    func tableView(tableView: UITableView, numberofRowInsection section: Int) -> Int {
        return alphNames.count 
    }

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
           let cellIdentifier = "Cell"
           let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath : indexPath) as UITableViewCell

           //Configure the cell...
           cell.textLabel?.text = departmentNames[indexPath.row]
           return cell
    }

}

Answer 1

You made an typo in numberOfRowsInSection function. It is a required function of the UITableViewDataSource protocol. It should be

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return alphNames.count
}

You have typed numberofRowInsection instead.

Answer 2

You have to implement all the required functions. You can see them by command clicking on the UITableViewDataSource. To make sure you don't make any typo, just copy the required functions or start typing in the ViewController the name of the function and autocompletion should do the rest.