单元格之间的随机广告

Question

我试图在UITableView之间的单元格之间将广告完全随机地放在之间。我要告诉我的主要文件，你明白我在做什么，我怎么想：

表视图控制器：

class Page1: UITableViewController, UISearchBarDelegate { 

    @IBOutlet weak var searchBar: UISearchBar! 
    var employeesSearching = [Employee]() 
    var isSearching : Bool = false 

    @IBOutlet weak var GoogleBannerView: GADBannerView! 

    let collation = UILocalizedIndexedCollation.current() 
    var sections: [[Any]] = [] 
    var objects: [Any] = [] { 
     didSet { 
      let selector: Selector = #selector(getter: UIApplicationShortcutItem.localizedTitle) 
      sections = Array(repeating: [], count: collation.sectionTitles.count) 
      let sortedObjects = collation.sortedArray(from: objects, collationStringSelector: selector) 
      for object in sortedObjects { 
       let sectionNumber = collation.section(for: object, collationStringSelector: selector) 
       sections[sectionNumber].append(object as AnyObject) 
      } 
      self.tableView.reloadData() 
     } 
    } 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     self.searchBar.delegate = self 
     self.tableView.contentOffset = CGPoint(x: 0, y: searchBar.frame.height) //hide searchBar 

     Shared.instance.employees.sort { 
      (first, second) in 
      first.name.compare(second.name, options: .diacriticInsensitive) == .orderedAscending 
     } 
    } 

    func getMatches(letter: String, withArray array: [Employee]) -> [Employee] { 
     return array.filter({ ($0.name.compare(letter, options: .diacriticInsensitive, range: $0.name.startIndex..<$0.name.index($0.name.startIndex, offsetBy: 1), locale: nil) == .orderedSame)}) 
    } 

    override func numberOfSections(in tableView: UITableView) -> Int { 
     if isSearching { return 1 } 
     return collation.sectionTitles.count 
    } 

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
     let letter = collation.sectionTitles[section] 
     if isSearching { 
      return employeesSearching.count 
     } else { 
      let matches = getMatches(letter: letter, withArray: Shared.instance.employees) 
      if !matches.isEmpty { return matches.count } 
     } 
     return 0 
    } 

    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? { 
     if isSearching { return nil } 
     let letter = collation.sectionTitles[section] 
     let matches = getMatches(letter: letter, withArray: Shared.instance.employees) 
     if matches.count == 0 { return nil } 
     return collation.sectionTitles[section] } 

    override func sectionIndexTitles(for tableView: UITableView) -> [String]? { 
     if isSearching { return nil } 
     return collation.sectionIndexTitles } 

    override func tableView(_ tableView: UITableView, sectionForSectionIndexTitle title: String, at index: Int) -> Int { 
     return collation.section(forSectionIndexTitle: index) } 

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 
     if indexPath.row == 3 || indexPath.row == 9 || indexPath.row == 14 { 
      let cellAd = tableView.dequeueReusableCell(withIdentifier: "cellAd", for: indexPath) 

      GoogleBannerView?.adUnitID = "ca-app-pub-6043248661561548/4628935113" 
      GoogleBannerView?.rootViewController = self 
      GoogleBannerView?.load(GADRequest()) 

      return cellAd 
     } 
     let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell1 
     if isSearching { 
      cell.nameLabel.text = employeesSearching[indexPath.row].name 
      cell.positionLabel.text = employeesSearching[indexPath.row].position 
     } else { 
      let letter = collation.sectionTitles[indexPath.section] 
      let matches = getMatches(letter: letter, withArray: Shared.instance.employees) 

      cell.nameLabel.text = matches[indexPath.row].name 
      cell.positionLabel.text = matches[indexPath.row].position 
     } 
     return cell 
    } 
    ... 
    ... 
    ... 
} 

如何走私的UITableViewCell的！ AdCell随机进入UITableView？

我的意思是，我应该怎么做cellForRowAt？所有这些索引部分之间我都有点困惑。

Answer 1

首先，你需要为0，你的tableView数据源数组大小之间产生一个随机数

let lower : UInt32 = 0 
let upper : UInt32 = array.count 
let randomIndex = arc4random_uniform(upper - lower) + lower 

，那么你需要在randomIndex添加广告对象，数组中

array.insert(AdObject, atIndex:randomIndex) 

然后就重装你的tableView并处理cellForRow函数中的不同类型

Answer 2

一种方法是在数据模型中的所需位置插入某种“广告”对象。

然后更新cellForRowAt以查看数据模型中对于给定索引路径的对象。如果它是“广告”对象，请创建并设置“广告”单元格。否则，请按照现在的方法创建并设置适当的数据单元格。