reloadData每次打開應用程序時，按按鈕

Question

每當我的應用程序從後臺打開並按按鈕時，我該如何使用它？

斯威夫特3

太謝謝你了！

Answer 1

趕上前臺通知：

class ViewController: UIViewController { 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     NSNotificationCenter.defaultCenter().addObserver(self, selector: "willEnterForeground:", name: UIApplicationWillEnterForegroundNotification, object: nil) 
    } 

    func willEnterForeground(notification: NSNotification!) { 
     // do whatever you want when the app is brought back to the foreground 
     self.tableView.reloadData() 
    } 

    deinit { 
     // make sure to remove the observer when this view controller is dismissed/deallocated 

     NSNotificationCenter.defaultCenter().removeObserver(self, name: nil, object: nil) 
    } 
} 

刷新您的實現代碼如下：

override func viewDidLoad() { 
    super.viewDidLoad() 

    self.tableview.reloadData() 
}