iOS8、SwiftindexPath.row错误"unresolved identifier"

Question

我目前正在学习编程语言 Swift，但我遇到了一个烦人的错误，这让我抓狂。

我的代码：

import UIKit

class RestaurantTableViewController: UITableViewController {

override func viewDidLoad() {
    super.viewDidLoad()

    // Uncomment the following line to preserve selection between presentations
    // self.clearsSelectionOnViewWillAppear = false

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
    // self.navigationItem.rightBarButtonItem = self.editButtonItem()
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

var restaurantNames = ["Cafe Deadend", "Homei", "Teakha", "Cafe Loisl", "Petite Oyster", "For Kee Restaurant", "Po's Atelier", "Bourke Street Bakery", "Haigh's Chocolate", "Palomino Espresso", "Upstate", "Traif", "Graham Avenue Meats", "Waffle & Wolf", "Five Leaves", "Cafe Lore", "Confessional", "Barrafina", "Donostia", "Royal Oak", "Thai Cafe"]

var restaurantImages = ["cafedeadend.jpg", "homei.jpg", "teakha.jpg", "cafeloisl.jpg", "petiteoyster.jpg", "forkeerestaurant.jpg", "posatelier.jpg", "bourkestreetbakery.jpg", "haighschocolate.jpg", "palominoespresso.jpg", "upstate.jpg", "traif.jpg", "grahamavenuemeats.jpg", "wafflewolf.jpg", "fiveleaves.jpg", "cafelore.jpg", "confessional.jpg", "barrafina.jpg", "donostia.jpg", "royaloak.jpg", "thaicafe.jpg"]

var restaurantLocations = ["Hong Kong", "Hong Kong", "Hong Kong", "Hong Kong", "Hong Kong", "Hong Kong", "Hong Kong", "Sydney", "Sydney", "Sydney",
    "New York", "New York", "New York", "New York", "New York", "New York", "New York", "London", "London", "London", "London"]

var restaurantTypes = ["Coffee & Tea Shop", "Cafe", "Tea House", "Austrian / Causual Drink", "French", "Bakery", "Bakery", "Chocolate", "Cafe", "American / Seafood", "American", "American", "Breakfast & Brunch", "Coffee & Tea", "Coffee & Tea", "Latin American", "Spanish", "Spanish", "Spanish", "British", "Thai"]


override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // return the number of rows in the section.
    return self.restaurantNames.count
}

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    let cellIdentifier = "Cell"
    let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as CustomTableViewCell

    // configure the cell...
    cell.nameLabel.text = restaurantNames[indexPath.row]
    cell.locationLabel.text = restaurantLocations[indexPath.row]
    cell.typeLabel.text = restaurantTypes[indexPath.row]

    cell.thumbnailImageView.image = UIImage(named: restaurantImages[indexPath.row])
    cell.thumbnailImageView.layer.cornerRadius = cell.thumbnailImageView.frame.size.width / 2
    cell.thumbnailImageView.clipsToBounds = true

    return cell
}

override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    // return the number of sections
    return 1
}

override func prefersStatusBarHidden() -> Bool {
    return true
}

override func tableView(tableView: UITableView, didSelectRowAtIndexPath: NSIndexPath) {
    // create an option menu as an action sheet
    let optionMenu = UIAlertController(title: nil, message: "What do you want to do?", preferredStyle: .ActionSheet)

    // add actions to the menu
    let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
    optionMenu.addAction(cancelAction)

    // add call action
    let callActionHandler = { (action:UIAlertAction!) -> Void in
        let alertMessage = UIAlertController(title: "Not available", message: "Sorry, try again later", preferredStyle: .Alert)
        alertMessage.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
        self.presentViewController(alertMessage, animated: true, completion: nil)
    }

    let callAction = UIAlertAction(title: "Call " + "123-000-\(indexPath.row)", style: UIAlertActionStyle.Default, handler: callActionHandler)
    optionMenu.addAction(callAction)



    // display the menu
    self.presentViewController(optionMenu, animated: true, completion: nil)
    }
}

这一行：

let callAction = UIAlertAction(title: "Call " + "123-000-\(indexPath.row)", style: UIAlertActionStyle.Default, handler: callActionHandler)
    optionMenu.addAction(callAction)

给我一个 use of unresolved identifier 'indexPath' 错误，我看不出错误来自哪里。我想使用行号作为 phone 数字的最后一位数字。

提前致谢！克里斯

Answer 1

问题出在您的函数定义上。您没有在此处指定参数名称。

变化：

override func tableView(tableView: UITableView, didSelectRowAtIndexPath: NSIndexPath)

至

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)

Answer 2

我也是 Swift 的新手，但我认为 NSIndexPath 的变量名称是 "didSelectRowAtIndexPath":

let callAction = UIAlertAction(title: "Call " + "123-000-\(didSelectRowAtIndexPath.row)", style: UIAlertActionStyle.Default, handler: callActionHandler)
    optionMenu.addAction(callAction)

iOS8、SwiftindexPath.row错误"unresolved identifier"

iOS 8, Swift indexPath.row error "unresolved identifier"

iphone

ios

swift

ios8