Swift-Add headers and footers to table TableView

UITableView with Var Tableheaderview:uiview? properties and Var Tablefooterview:uiview? properties, you can create a header and footer for the list tableview by assigning a value to it.
as follows:
The code is as follows:

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import UIKitclass ViewController: UIViewController,UITableViewDelegate,    UITableViewDataSource,UIGestureRecognizerDelegate {        var tableView:UITableView?        var ctrlnames:[String] = ["UILabel 标签","UIButton 按钮","UIDatePiker 日期选择器"]        override func viewDidLoad() {        super.viewDidLoad()                //创建表视图        self.tableView = UITableView(frame: UIScreen.mainScreen().applicationFrame,            style:UITableViewStyle.Plain)        self.tableView!.delegate = self        self.tableView!.dataSource = self        //创建一个重用的单元格        self.tableView!.registerClass(UITableViewCell.self, forCellReuseIdentifier: "SwiftCell")        self.view.addSubview(self.tableView!)                //给TableView添加表头页眉        var headerView:UIView = UIView(frame: CGRectMake(0,0,tableView!.frame.size.width,60))        var headerlabel:UILabel = UILabel(frame: headerView.bounds)        headerlabel.textColor = UIColor.whiteColor()        headerlabel.backgroundColor = UIColor.clearColor()        headerlabel.font = UIFont.systemFontOfSize(16)        headerlabel.text = "TableView 页眉"        headerView.addSubview(headerlabel)        headerView.backgroundColor = UIColor.blackColor()        tableView?.tableHeaderView = headerView                 //给TableView添加表头页尾        var footerView:UIView = UIView(frame: CGRectMake(0,0,tableView!.frame.size.width,60))        var footerlabel:UILabel = UILabel(frame: footerView.bounds)        footerlabel.textColor = UIColor.whiteColor()        footerlabel.backgroundColor = UIColor.clearColor()        footerlabel.font = UIFont.systemFontOfSize(16)        footerlabel.text = "TableView 页眉"        footerView.addSubview(footerlabel)        footerView.backgroundColor = UIColor.blackColor()        tableView?.tableFooterView = footerView    }        //在本例中，只有一个分区    func numberOfSectionsInTableView(tableView: UITableView!) -> Int {        return 1;    }        //返回表格行数（也就是返回控件数）    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {        return self.ctrlnames.count    }        //创建各单元显示内容(创建参数indexPath指定的单元）    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath)        -> UITableViewCell    {        //为了提供表格显示性能，已创建完成的单元需重复使用        let identify:String = "SwiftCell"        //同一形式的单元格重复使用，在声明时已注册        let cell = tableView.dequeueReusableCellWithIdentifier(identify, forIndexPath: indexPath)            as UITableViewCell        cell.accessoryType = UITableViewCellAccessoryType.DisclosureIndicator        cell.textLabel?.text = self.ctrlnames[indexPath.row]        return cell    }}

Swift-Add headers and footers to table TableView