添加下拉式選單的刷新畫面

新增一個變數

var refresher:UIRefreshControl?

初始化他

 override func viewDidLoad() {

        super.viewDidLoad()

        // 初始化

        refresher = UIRefreshControl()

        // 設定title

        refresher?.attributedTitle = NSAttributedString(string: "正在努力加載中")

        

         //  設定執行的selector

         // TableViewController -> 是這個 class 的名字

         // refresh    ->  function name

refresher?.addTarget(self, action: #selector(TableViewController.refresh), for: UIControlEvents.valueChanged)

        // add subview        

        tableView.addSubview(refresher!)

        

        //print(currentuser)

        

        getAccount()

        // 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()

    }

func refresh(){

        getAccount()

        refresher?.endRefreshing()

    }