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  • Ios Swift | TableView为空/空白（使用自定义单元格） 我的TabLVIEW是空的/只显示空白单元格（屏幕截图） 我用一个TableViewController和一个带有TableView的ViewController都试过了，两个都显示了相同的结果。

Ios Swift | TableView为空/空白（使用自定义单元格） 我的TabLVIEW是空的/只显示空白单元格（屏幕截图） 我用一个TableViewController和一个带有TableView的ViewController都试过了，两个都显示了相同的结果。

ios arrays swift uitableview

Ios Swift | TableView为空/空白（使用自定义单元格） 我的TabLVIEW是空的/只显示空白单元格（屏幕截图） 我用一个TableViewController和一个带有TableView的ViewController都试过了，两个都显示了相同的结果。 ,ios,arrays,swift,uitableview,tableviewcell,Ios,Arrays,Swift,Uitableview,Tableviewcell,因此，我试图确定问题的具体位置，但似乎没有阅读“for statesment”。（见打印的支票） 我对编码还不熟悉，但这没有任何意义，我已经尝试了这里所有关于stackoverflow的好建议，但似乎都不管用 （所有插座均已连接等） 我将发布两个变体：ViewController和TableViewController（两者应获得相同的信息） TableViewController: import UIKit import Parse class HistoryTableViewControl

因此，我试图确定问题的具体位置，但似乎没有阅读“for statesment”。（见打印的支票）

我对编码还不熟悉，但这没有任何意义，我已经尝试了这里所有关于stackoverflow的好建议，但似乎都不管用 （所有插座均已连接等）

我将发布两个变体：ViewController和TableViewController（两者应获得相同的信息）

TableViewController:

import UIKit
import Parse

class HistoryTableViewController: UITableViewController {

var zeit = [String]()
var kosten = [String]()
var kilometer = [String]()
var datum = [String]()


override func viewDidLoad() {
    super.viewDidLoad()


    let query = PFQuery(className: "GemachteFahrten")

    query.whereKey("gefahreneZeit", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("kosten", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("createdAt", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("gefahreneKilometer", equalTo: (PFUser.current()?.objectId!)!)

    print("check1")

    query.findObjectsInBackground { (objects, error) in

        if error != nil {

            print("error finding user data")


        } else {

            print("check2")
            if let fahrtenRequests = objects {

                self.zeit.removeAll()
                self.datum.removeAll()
                self.kosten.removeAll()
                self.kilometer.removeAll()

                print("check3")


                for fahrtenRequest in fahrtenRequests {

                    print("check4")

                    self.zeit.append(fahrtenRequest["gefahreneZeit"] as! String!)
                    self.kosten.append(fahrtenRequest["kosten"] as! String)
                    self.datum.append(fahrtenRequest["createdAt"] as! String)
                    self.kilometer.append(fahrtenRequest["gefahreneKilometer"] as! String)

                    self.tableView.reloadData()

                    print("check5")

                }
                print("check6")

            }
         }
    }

    self.tableView.reloadData()
}

override func viewDidAppear(_ animated: Bool) {

}

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

// MARK: - Table view data source

override func numberOfSections(in 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 datum.count
}


override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "CellHistory", for: indexPath) as! CellHistoryViewControllerTableViewCell


            cell.durationCell.text = zeit[indexPath.row]

            cell.costCell.text = kosten[indexPath.row]
            cell.routeCell.text = kilometer[indexPath.row]

            cell.dateCell.text = datum[indexPath.row]

            return cell

}

import UIKit
import Parse

class HistoryViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

var zeit = [String]()
var kosten = [String]()
var kilometer = [String]()
var datum = [String]()

@IBOutlet weak var tableView: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()

    let query = PFQuery(className: "GemachteFahrten")

    query.whereKey("gefahreneZeit", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("kosten", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("createdAt", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("gefahreneKilometer", equalTo: (PFUser.current()?.objectId!)!)

    print("check1")

    query.findObjectsInBackground { (objects, error) in

        if error != nil {

            print("error finding user data")

        } else {

            print("check2")
            if let fahrtenRequests = objects {

                self.zeit.removeAll()
                self.datum.removeAll()
                self.kosten.removeAll()
                self.kilometer.removeAll()

                print("check3")


                for fahrtenRequest in fahrtenRequests {

                    print("check4")

                    self.zeit.append(fahrtenRequest["gefahreneZeit"] as! String!)
                    self.kosten.append(fahrtenRequest["kosten"] as! String)
                    self.datum.append(fahrtenRequest["createdAt"] as! String)
                    self.kilometer.append(fahrtenRequest["gefahreneKilometer"] as! String)

                    self.tableView.reloadData()

                    print("check5")

                }
                print("check6")

            }


        }

    }

    self.tableView.reloadData()
   }

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}



internal func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows

         return datum.count
}


internal func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell: CellHistoryViewControllerTableViewCell = tableView.dequeueReusableCell(withIdentifier: "CellHistory", for: indexPath) as! CellHistoryViewControllerTableViewCell


    cell.durationCell.text = zeit[indexPath.row]

    cell.costCell.text = kosten[indexPath.row]
    cell.routeCell.text = kilometer[indexPath.row]

    cell.dateCell.text = datum[indexPath.row]

    return cell
   }

import UIKit

class CellHistoryViewControllerTableViewCell: UITableViewCell {


@IBOutlet weak var dateCell: UILabel!

@IBOutlet weak var durationCell: UILabel!

@IBOutlet weak var costCell: UILabel!

@IBOutlet weak var routeCell: UILabel!

override func awakeFromNib() {
    super.awakeFromNib()
    // Initialization code

}

override func setSelected(_ selected: Bool, animated: Bool) {
    super.setSelected(selected, animated: animated)

    // Configure the view for the selected state
 }
}
在控制台中，它打印以下内容：

看来这就是问题所在？还是我在别的地方做错了什么

print("check3")


                for fahrtenRequest in fahrtenRequests {

                    print("check4")

                    self.zeit.append(fahrtenRequest["gefahreneZeit"] as! String!)
                    self.kosten.append(fahrtenRequest["kosten"] as! String)
                    self.datum.append(fahrtenRequest["createdAt"] as! String)
                    self.kilometer.append(fahrtenRequest["gefahreneKilometer"] as! String)

                    self.tableView.reloadData()

                    print("check5")

                }
                print("check6")
这里还有ViewController和添加的TableView的另一个变体：

import UIKit
import Parse

class HistoryTableViewController: UITableViewController {

var zeit = [String]()
var kosten = [String]()
var kilometer = [String]()
var datum = [String]()


override func viewDidLoad() {
    super.viewDidLoad()


    let query = PFQuery(className: "GemachteFahrten")

    query.whereKey("gefahreneZeit", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("kosten", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("createdAt", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("gefahreneKilometer", equalTo: (PFUser.current()?.objectId!)!)

    print("check1")

    query.findObjectsInBackground { (objects, error) in

        if error != nil {

            print("error finding user data")


        } else {

            print("check2")
            if let fahrtenRequests = objects {

                self.zeit.removeAll()
                self.datum.removeAll()
                self.kosten.removeAll()
                self.kilometer.removeAll()

                print("check3")


                for fahrtenRequest in fahrtenRequests {

                    print("check4")

                    self.zeit.append(fahrtenRequest["gefahreneZeit"] as! String!)
                    self.kosten.append(fahrtenRequest["kosten"] as! String)
                    self.datum.append(fahrtenRequest["createdAt"] as! String)
                    self.kilometer.append(fahrtenRequest["gefahreneKilometer"] as! String)

                    self.tableView.reloadData()

                    print("check5")

                }
                print("check6")

            }
         }
    }

    self.tableView.reloadData()
}

override func viewDidAppear(_ animated: Bool) {

}

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

// MARK: - Table view data source

override func numberOfSections(in 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 datum.count
}


override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "CellHistory", for: indexPath) as! CellHistoryViewControllerTableViewCell


            cell.durationCell.text = zeit[indexPath.row]

            cell.costCell.text = kosten[indexPath.row]
            cell.routeCell.text = kilometer[indexPath.row]

            cell.dateCell.text = datum[indexPath.row]

            return cell

}

import UIKit
import Parse

class HistoryViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

var zeit = [String]()
var kosten = [String]()
var kilometer = [String]()
var datum = [String]()

@IBOutlet weak var tableView: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()

    let query = PFQuery(className: "GemachteFahrten")

    query.whereKey("gefahreneZeit", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("kosten", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("createdAt", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("gefahreneKilometer", equalTo: (PFUser.current()?.objectId!)!)

    print("check1")

    query.findObjectsInBackground { (objects, error) in

        if error != nil {

            print("error finding user data")

        } else {

            print("check2")
            if let fahrtenRequests = objects {

                self.zeit.removeAll()
                self.datum.removeAll()
                self.kosten.removeAll()
                self.kilometer.removeAll()

                print("check3")


                for fahrtenRequest in fahrtenRequests {

                    print("check4")

                    self.zeit.append(fahrtenRequest["gefahreneZeit"] as! String!)
                    self.kosten.append(fahrtenRequest["kosten"] as! String)
                    self.datum.append(fahrtenRequest["createdAt"] as! String)
                    self.kilometer.append(fahrtenRequest["gefahreneKilometer"] as! String)

                    self.tableView.reloadData()

                    print("check5")

                }
                print("check6")

            }


        }

    }

    self.tableView.reloadData()
   }

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}



internal func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows

         return datum.count
}


internal func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell: CellHistoryViewControllerTableViewCell = tableView.dequeueReusableCell(withIdentifier: "CellHistory", for: indexPath) as! CellHistoryViewControllerTableViewCell


    cell.durationCell.text = zeit[indexPath.row]

    cell.costCell.text = kosten[indexPath.row]
    cell.routeCell.text = kilometer[indexPath.row]

    cell.dateCell.text = datum[indexPath.row]

    return cell
   }

import UIKit

class CellHistoryViewControllerTableViewCell: UITableViewCell {


@IBOutlet weak var dateCell: UILabel!

@IBOutlet weak var durationCell: UILabel!

@IBOutlet weak var costCell: UILabel!

@IBOutlet weak var routeCell: UILabel!

override func awakeFromNib() {
    super.awakeFromNib()
    // Initialization code

}

override func setSelected(_ selected: Bool, animated: Bool) {
    super.setSelected(selected, animated: animated)

    // Configure the view for the selected state
 }
}
这里还有自定义单元格代码：

import UIKit
import Parse

class HistoryTableViewController: UITableViewController {

var zeit = [String]()
var kosten = [String]()
var kilometer = [String]()
var datum = [String]()


override func viewDidLoad() {
    super.viewDidLoad()


    let query = PFQuery(className: "GemachteFahrten")

    query.whereKey("gefahreneZeit", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("kosten", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("createdAt", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("gefahreneKilometer", equalTo: (PFUser.current()?.objectId!)!)

    print("check1")

    query.findObjectsInBackground { (objects, error) in

        if error != nil {

            print("error finding user data")


        } else {

            print("check2")
            if let fahrtenRequests = objects {

                self.zeit.removeAll()
                self.datum.removeAll()
                self.kosten.removeAll()
                self.kilometer.removeAll()

                print("check3")


                for fahrtenRequest in fahrtenRequests {

                    print("check4")

                    self.zeit.append(fahrtenRequest["gefahreneZeit"] as! String!)
                    self.kosten.append(fahrtenRequest["kosten"] as! String)
                    self.datum.append(fahrtenRequest["createdAt"] as! String)
                    self.kilometer.append(fahrtenRequest["gefahreneKilometer"] as! String)

                    self.tableView.reloadData()

                    print("check5")

                }
                print("check6")

            }
         }
    }

    self.tableView.reloadData()
}

override func viewDidAppear(_ animated: Bool) {

}

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

// MARK: - Table view data source

override func numberOfSections(in 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 datum.count
}


override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "CellHistory", for: indexPath) as! CellHistoryViewControllerTableViewCell


            cell.durationCell.text = zeit[indexPath.row]

            cell.costCell.text = kosten[indexPath.row]
            cell.routeCell.text = kilometer[indexPath.row]

            cell.dateCell.text = datum[indexPath.row]

            return cell

}

import UIKit
import Parse

class HistoryViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

var zeit = [String]()
var kosten = [String]()
var kilometer = [String]()
var datum = [String]()

@IBOutlet weak var tableView: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()

    let query = PFQuery(className: "GemachteFahrten")

    query.whereKey("gefahreneZeit", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("kosten", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("createdAt", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("gefahreneKilometer", equalTo: (PFUser.current()?.objectId!)!)

    print("check1")

    query.findObjectsInBackground { (objects, error) in

        if error != nil {

            print("error finding user data")

        } else {

            print("check2")
            if let fahrtenRequests = objects {

                self.zeit.removeAll()
                self.datum.removeAll()
                self.kosten.removeAll()
                self.kilometer.removeAll()

                print("check3")


                for fahrtenRequest in fahrtenRequests {

                    print("check4")

                    self.zeit.append(fahrtenRequest["gefahreneZeit"] as! String!)
                    self.kosten.append(fahrtenRequest["kosten"] as! String)
                    self.datum.append(fahrtenRequest["createdAt"] as! String)
                    self.kilometer.append(fahrtenRequest["gefahreneKilometer"] as! String)

                    self.tableView.reloadData()

                    print("check5")

                }
                print("check6")

            }


        }

    }

    self.tableView.reloadData()
   }

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}



internal func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows

         return datum.count
}


internal func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell: CellHistoryViewControllerTableViewCell = tableView.dequeueReusableCell(withIdentifier: "CellHistory", for: indexPath) as! CellHistoryViewControllerTableViewCell


    cell.durationCell.text = zeit[indexPath.row]

    cell.costCell.text = kosten[indexPath.row]
    cell.routeCell.text = kilometer[indexPath.row]

    cell.dateCell.text = datum[indexPath.row]

    return cell
   }

import UIKit

class CellHistoryViewControllerTableViewCell: UITableViewCell {


@IBOutlet weak var dateCell: UILabel!

@IBOutlet weak var durationCell: UILabel!

@IBOutlet weak var costCell: UILabel!

@IBOutlet weak var routeCell: UILabel!

override func awakeFromNib() {
    super.awakeFromNib()
    // Initialization code

}

override func setSelected(_ selected: Bool, animated: Bool) {
    super.setSelected(selected, animated: animated)

    // Configure the view for the selected state
 }
}
我真的希望有人能认识到这个问题，如果你需要更多信息或截图，请告诉我：）

再次感谢您的帮助和时间：）

您没有将表视图委托设置为self，这就是它发生的原因。 在视图控制器和添加的TableView中：

import UIKit
import Parse

class HistoryTableViewController: UITableViewController {

var zeit = [String]()
var kosten = [String]()
var kilometer = [String]()
var datum = [String]()


override func viewDidLoad() {
    super.viewDidLoad()


    let query = PFQuery(className: "GemachteFahrten")

    query.whereKey("gefahreneZeit", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("kosten", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("createdAt", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("gefahreneKilometer", equalTo: (PFUser.current()?.objectId!)!)

    print("check1")

    query.findObjectsInBackground { (objects, error) in

        if error != nil {

            print("error finding user data")


        } else {

            print("check2")
            if let fahrtenRequests = objects {

                self.zeit.removeAll()
                self.datum.removeAll()
                self.kosten.removeAll()
                self.kilometer.removeAll()

                print("check3")


                for fahrtenRequest in fahrtenRequests {

                    print("check4")

                    self.zeit.append(fahrtenRequest["gefahreneZeit"] as! String!)
                    self.kosten.append(fahrtenRequest["kosten"] as! String)
                    self.datum.append(fahrtenRequest["createdAt"] as! String)
                    self.kilometer.append(fahrtenRequest["gefahreneKilometer"] as! String)

                    self.tableView.reloadData()

                    print("check5")

                }
                print("check6")

            }
         }
    }

    self.tableView.reloadData()
}

override func viewDidAppear(_ animated: Bool) {

}

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

// MARK: - Table view data source

override func numberOfSections(in 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 datum.count
}


override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "CellHistory", for: indexPath) as! CellHistoryViewControllerTableViewCell


            cell.durationCell.text = zeit[indexPath.row]

            cell.costCell.text = kosten[indexPath.row]
            cell.routeCell.text = kilometer[indexPath.row]

            cell.dateCell.text = datum[indexPath.row]

            return cell

}

import UIKit
import Parse

class HistoryViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

var zeit = [String]()
var kosten = [String]()
var kilometer = [String]()
var datum = [String]()

@IBOutlet weak var tableView: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()

    let query = PFQuery(className: "GemachteFahrten")

    query.whereKey("gefahreneZeit", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("kosten", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("createdAt", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("gefahreneKilometer", equalTo: (PFUser.current()?.objectId!)!)

    print("check1")

    query.findObjectsInBackground { (objects, error) in

        if error != nil {

            print("error finding user data")

        } else {

            print("check2")
            if let fahrtenRequests = objects {

                self.zeit.removeAll()
                self.datum.removeAll()
                self.kosten.removeAll()
                self.kilometer.removeAll()

                print("check3")


                for fahrtenRequest in fahrtenRequests {

                    print("check4")

                    self.zeit.append(fahrtenRequest["gefahreneZeit"] as! String!)
                    self.kosten.append(fahrtenRequest["kosten"] as! String)
                    self.datum.append(fahrtenRequest["createdAt"] as! String)
                    self.kilometer.append(fahrtenRequest["gefahreneKilometer"] as! String)

                    self.tableView.reloadData()

                    print("check5")

                }
                print("check6")

            }


        }

    }

    self.tableView.reloadData()
   }

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}



internal func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows

         return datum.count
}


internal func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell: CellHistoryViewControllerTableViewCell = tableView.dequeueReusableCell(withIdentifier: "CellHistory", for: indexPath) as! CellHistoryViewControllerTableViewCell


    cell.durationCell.text = zeit[indexPath.row]

    cell.costCell.text = kosten[indexPath.row]
    cell.routeCell.text = kilometer[indexPath.row]

    cell.dateCell.text = datum[indexPath.row]

    return cell
   }

import UIKit

class CellHistoryViewControllerTableViewCell: UITableViewCell {


@IBOutlet weak var dateCell: UILabel!

@IBOutlet weak var durationCell: UILabel!

@IBOutlet weak var costCell: UILabel!

@IBOutlet weak var routeCell: UILabel!

override func awakeFromNib() {
    super.awakeFromNib()
    // Initialization code

}

override func setSelected(_ selected: Bool, animated: Bool) {
    super.setSelected(selected, animated: animated)

    // Configure the view for the selected state
 }
}
  • 在viewDidLoad中，设置self.tableView.delegate=self
  • 将您的客户单元注册到表视图，如viewDidLoad中的示例
    tableView.registerNib（UINib（nibName:“nameonib”，bundle:nil），forCellReuseIdentifier:“reuseIdentifier”）
  • 在
    cellforrowatinexpath
    中，使用
    的“reuseIdentifier”
  • 它会起作用的
    • 您没有将表视图委托设置为self，这就是它发生的原因。 在视图控制器和添加的TableView中：

    import UIKit
import Parse

class HistoryTableViewController: UITableViewController {

var zeit = [String]()
var kosten = [String]()
var kilometer = [String]()
var datum = [String]()


override func viewDidLoad() {
    super.viewDidLoad()


    let query = PFQuery(className: "GemachteFahrten")

    query.whereKey("gefahreneZeit", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("kosten", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("createdAt", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("gefahreneKilometer", equalTo: (PFUser.current()?.objectId!)!)

    print("check1")

    query.findObjectsInBackground { (objects, error) in

        if error != nil {

            print("error finding user data")


        } else {

            print("check2")
            if let fahrtenRequests = objects {

                self.zeit.removeAll()
                self.datum.removeAll()
                self.kosten.removeAll()
                self.kilometer.removeAll()

                print("check3")


                for fahrtenRequest in fahrtenRequests {

                    print("check4")

                    self.zeit.append(fahrtenRequest["gefahreneZeit"] as! String!)
                    self.kosten.append(fahrtenRequest["kosten"] as! String)
                    self.datum.append(fahrtenRequest["createdAt"] as! String)
                    self.kilometer.append(fahrtenRequest["gefahreneKilometer"] as! String)

                    self.tableView.reloadData()

                    print("check5")

                }
                print("check6")

            }
         }
    }

    self.tableView.reloadData()
}

override func viewDidAppear(_ animated: Bool) {

}

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

// MARK: - Table view data source

override func numberOfSections(in 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 datum.count
}


override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "CellHistory", for: indexPath) as! CellHistoryViewControllerTableViewCell


            cell.durationCell.text = zeit[indexPath.row]

            cell.costCell.text = kosten[indexPath.row]
            cell.routeCell.text = kilometer[indexPath.row]

            cell.dateCell.text = datum[indexPath.row]

            return cell

}

    import UIKit
import Parse

class HistoryViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

var zeit = [String]()
var kosten = [String]()
var kilometer = [String]()
var datum = [String]()

@IBOutlet weak var tableView: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()

    let query = PFQuery(className: "GemachteFahrten")

    query.whereKey("gefahreneZeit", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("kosten", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("createdAt", equalTo: (PFUser.current()?.objectId!)!)

    query.whereKey("gefahreneKilometer", equalTo: (PFUser.current()?.objectId!)!)

    print("check1")

    query.findObjectsInBackground { (objects, error) in

        if error != nil {

            print("error finding user data")

        } else {

            print("check2")
            if let fahrtenRequests = objects {

                self.zeit.removeAll()
                self.datum.removeAll()
                self.kosten.removeAll()
                self.kilometer.removeAll()

                print("check3")


                for fahrtenRequest in fahrtenRequests {

                    print("check4")

                    self.zeit.append(fahrtenRequest["gefahreneZeit"] as! String!)
                    self.kosten.append(fahrtenRequest["kosten"] as! String)
                    self.datum.append(fahrtenRequest["createdAt"] as! String)
                    self.kilometer.append(fahrtenRequest["gefahreneKilometer"] as! String)

                    self.tableView.reloadData()

                    print("check5")

                }
                print("check6")

            }


        }

    }

    self.tableView.reloadData()
   }

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}



internal func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows

         return datum.count
}


internal func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell: CellHistoryViewControllerTableViewCell = tableView.dequeueReusableCell(withIdentifier: "CellHistory", for: indexPath) as! CellHistoryViewControllerTableViewCell


    cell.durationCell.text = zeit[indexPath.row]

    cell.costCell.text = kosten[indexPath.row]
    cell.routeCell.text = kilometer[indexPath.row]

    cell.dateCell.text = datum[indexPath.row]

    return cell
   }

    import UIKit

class CellHistoryViewControllerTableViewCell: UITableViewCell {


@IBOutlet weak var dateCell: UILabel!

@IBOutlet weak var durationCell: UILabel!

@IBOutlet weak var costCell: UILabel!

@IBOutlet weak var routeCell: UILabel!

override func awakeFromNib() {
    super.awakeFromNib()
    // Initialization code

}

override func setSelected(_ selected: Bool, animated: Bool) {
    super.setSelected(selected, animated: animated)

    // Configure the view for the selected state
 }
}
  • 在viewDidLoad中，设置self.tableView.delegate=self
  • 将您的客户单元注册到表视图，如viewDidLoad中的示例
    tableView.registerNib（UINib（nibName:“nameonib”，bundle:nil），forCellReuseIdentifier:“reuseIdentifier”）
  • 在
    cellforrowatinexpath
    中，使用
    的“reuseIdentifier”
  • 它会起作用的
    • 您需要将此代码添加到
    cellForRowAtIndexPath

    if cell == nil {
    cell = MyCell(style: UITableViewCellStyle.Default, reuseIdentifier: kCellIdentifier)
}
    所以你的方法是-

    internal func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell: CellHistoryViewControllerTableViewCell = tableView.dequeueReusableCell(withIdentifier: "CellHistory", for: indexPath) as! CellHistoryViewControllerTableViewCell

  if cell == nil {
    cell = CellHistoryViewControllerTableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "CellHistory")
}
    cell.durationCell.text = zeit[indexPath.row]

    cell.costCell.text = kosten[indexPath.row]
    cell.routeCell.text = kilometer[indexPath.row]

    cell.dateCell.text = datum[indexPath.row]

    return cell



}
    也可以这样注册您的xib：-

    override func viewDidLoad() {
    super.viewDidLoad()

    tableView.registerNib(UINib(nibName: "CellHistoryViewControllerTableViewCell", bundle: nil), forCellReuseIdentifier: "CellHistory")
}
    您需要将此代码添加到
    cellForRowAtIndexPath

    if cell == nil {
    cell = MyCell(style: UITableViewCellStyle.Default, reuseIdentifier: kCellIdentifier)
}
    所以你的方法是-

    internal func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell: CellHistoryViewControllerTableViewCell = tableView.dequeueReusableCell(withIdentifier: "CellHistory", for: indexPath) as! CellHistoryViewControllerTableViewCell

  if cell == nil {
    cell = CellHistoryViewControllerTableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "CellHistory")
}
    cell.durationCell.text = zeit[indexPath.row]

    cell.costCell.text = kosten[indexPath.row]
    cell.routeCell.text = kilometer[indexPath.row]

    cell.dateCell.text = datum[indexPath.row]

    return cell



}
    也可以这样注册您的xib：-

    override func viewDidLoad() {
    super.viewDidLoad()

    tableView.registerNib(UINib(nibName: "CellHistoryViewControllerTableViewCell", bundle: nil), forCellReuseIdentifier: "CellHistory")
}
    为什么在
    check2
    和if-let语句之后删除所有对象
    fahrtenrequest
    之后为空，因此没有循环内容我认为只有在有新对象要加载的情况下他才会删除所有旧对象…我会在打印（“fahrtenRequests.count=（fahrtenRequests.count）”）后使用print（“check3”）打印fahrtenRequests中的项目数，以进一步调查此问题。或者更好地按照Zeb的建议使用调试器。顺便说一句，尝试使用带断点的调试器来查看真正发生的情况我使用-fahrtenrequests.count进行了尝试，它等于0（也是在删除删除部分之后；），当打印对象时，我得到一个空数组..所以从解析中获取字符串肯定有问题。。。我尝试了组合音，但没有任何效果：（所有信息都在parse triple checked上。）也许你在代码中看到了一些警告？@slashburn为什么要在
    check2
    之后删除所有对象，而if-let语句？
    fahrtenrequest
    之后是空的，所以没有要循环的内容。我认为他只是在有新对象要删除时才删除所有旧对象ad…我会在打印（“检查3”）之后使用print（“fahrtenRequests.count=（fahrtenRequests.count）”）打印fahrtenRequests中的项目数若要进一步调查此问题。或者更好地按照Zeb的建议使用调试器。顺便说一句，尝试使用带断点的调试器来查看实际发生的情况。我使用-fahrtenrequests.count进行了尝试，它等于0（也是在移除移除部分之后；），在打印对象时，我得到了一个空数组..所以从解析中获取字符串一定是出了问题…我尝试了组合音，但无效：（所有信息都在解析中经过了三重检查！）。也许您在代码中看到了一些警告？@slashburnThank！：）不幸的是，它不起作用，从解析中获取字符串时出现某种问题，因为数组中没有对象：/Thank you！：）不幸的是，它不起作用，从解析中获取字符串时出现某种问题，因为数组中没有对象：/Thank you！：）。。不幸的是，它不起作用，现在似乎在从parse->empty array/获取信息时出现了某种问题：谢谢你的帮助！：）。。不幸的是，它不起作用，现在似乎在从parse->empty array获取信息时出现了某种问题：/