Question

我似乎无法弄清楚为什么我的手机区域中没有数据。这是我的TableView。单元格字段在单元格类中链接。小区标识符是＆＃34; cell＆＃34;。

当我拥有它＆＃34; print＆＃34;我得到的PFObject：

["Scott"] ["Hoffman"]
["Scott", "Johnny"] ["Hoffman", "Apple"]
["Scott", "Johnny", "dsgfdsfg"] ["Hoffman", "Apple", "dsdsgf"]

class ParticipantTableViewController：UITableViewController {

let userLabel = PFUser.currentUser()?.username
var firstname = [String]()
var lastname = [String]()
var laps = [String]()

override func viewDidAppear(animated: Bool) {
}
override func viewDidLoad() {
    super.viewDidLoad()

   // self.navigationItem.title = userLabel

   self.navigationItem.setHidesBackButton(false, animated:true);

    // Query database for school
    let currentUser = PFUser.currentUser()
    let userSchool = currentUser!.objectForKey("school") as! String
    print(userSchool)

    //Query database for Participants
   let query = PFQuery(className:"Participant")
   query.whereKey("school", equalTo:userSchool)
    query.findObjectsInBackgroundWithBlock({ (objects, error) -> Void in

        if let objects = objects {
            for object:PFObject in objects {
                self.firstname.append(object["firstname"] as! String)
                self.lastname.append(object["lastname"] as! String)

             //   self.laps.append(object["laps"] as! String)

             print(self.firstname, self.lastname)
                self.tableView.reloadData()
            }
        }
    })
    // 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.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    // #warning Incomplete implementation, return the number of sections
    return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows
    return 0
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    let cell:ParticipantTableViewCell = tableView.dequeueReusableCellWithIdentifier("reuseIdentifier", forIndexPath: indexPath) as! ParticipantTableViewCell
    // Configure the Cell


    cell.firstnameLabel.text = self.firstname[indexPath.row] as String;
    cell.lastnameLabel.text = self.lastname[indexPath.row] as String;
  //myCell.lapLabel.text = self.laps[indexPath.row]


    return cell
}

}

Answer 1

问题是您在0方法中返回tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int，不会呈现任何单元格。

您应该返回要渲染的单元格数，在您的情况下是您firstname数组中的字符串数。所以你的方法看起来像：

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

TableView没有显示数据

1 个答案: