Swift - 自定义UITableViewCell内的UIView不会更新按钮/标签

Question

我刚刚开始使用Swift，并且遇到了一些有关自定义UITableViewCell的奇怪问题。问题是我需要在每个表单元格中有一个白色背景，如here。

我已经创建了一个图像，标签和按钮自定义的UITableViewCell类和创建IBOutlets，如下所示：

import UIKit 

class LocationTableViewCell: UITableViewCell { 

@IBOutlet var locationImageView: UIImageView! 
@IBOutlet var locationButton: UIButton! 
@IBOutlet var locationLabel: 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 
} 

我的视图控制器的代码是：

import UIKit 

class ViewController: UIViewController, UITableViewDataSource { 

@IBOutlet var locationTableView: UITableView! 

var skiLocation = Location(name: "Banff", picture: UIImage(named: "ski.jpeg")!) 
var tundraLocation = Location(name: "Yellowknife", picture: UIImage(named: "tundra.jpeg")!) 
var beachLocation = Location(name: "Cancun", picture: UIImage(named: "beach.jpeg")!) 
var locations: [Location] = [] 



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

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

    cell.locationLabel.text = self.locations[indexPath.row].name 
    cell.locationImageView.image = self.locations[indexPath.row].picture 

    return cell 
} 

override func viewDidLoad() { 
    super.viewDidLoad() 
    // Do any additional setup after loading the view, typically from a nib. 
    self.locations = [skiLocation, tundraLocation, beachLocation] 
    self.locationTableView.dataSource = self 
} 

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


} 

我已经接近这一问题通过在每个表视图内部创建一个UIView，然后在UIView中放置按钮，标签和图像。这只是为了获得白色背景。然而，当我运行我的代码时，一切都如预期的那样显示，除了没有UILabel和UIButton按照故事板的风格化。当我尝试更改标签的背景或通过故事板的按钮时，没有任何更改。没有标签，只是通用按钮。奇怪的部分是我可以通过ViewController类将图像设置为UIImageView。

有什么想法？

编辑：Here是链接到故事板视图。我已经使用故事板视图中的标识符字段来链接单元格。

Answer 1

您有UITableViewDataSource但缺少UITableViewDelegate。

import UIKit 

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate { 

@IBOutlet var locationTableView: UITableView! 

var skiLocation = Location(name: "Banff", picture: UIImage(named: "ski.jpeg")!) 
var tundraLocation = Location(name: "Yellowknife", picture: UIImage(named: "tundra.jpeg")!) 
var beachLocation = Location(name: "Cancun", picture: UIImage(named: "beach.jpeg")!) 
var locations: [Location] = [] 



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

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

    cell.locationLabel.text = self.locations[indexPath.row].name 
    cell.locationImageView.image = self.locations[indexPath.row].picture 

    return cell 
} 

override func viewDidLoad() { 
    super.viewDidLoad() 
    // Do any additional setup after loading the view, typically from a nib. 
    self.locations = [skiLocation, tundraLocation, beachLocation] 
    self.locationTableView.dataSource = self 
    self.locationTableView.delegate = self 

} 

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


}