UIActivityIndi​​cator瞬间显示

Question

我试图在用户点击按钮之前显示我的应用程序的旋转活动指示符，然后才会显示下一个视图 - 这种工作方式，我在一瞬间看到它

@IBOutlet weak var myActivityIndicator: UIActivityIndicatorView! 
@IBOutlet weak var eventsbtn: UIButton! 
@IBOutlet weak var pubsbtn: UIButton! 
override func viewWillAppear(animated: Bool) { 

    myActivityIndicator.stopAnimating() 
    myActivityIndicator.hidden = true 
} 
override func viewDidLoad() { 
    super.viewDidLoad() 

    eventsbtn.layer.cornerRadius = 8 
    pubsbtn.layer.cornerRadius = 8 
} 



@IBAction func getEvents(sender: AnyObject) { 

    myActivityIndicator.hidden = false 
    myActivityIndicator.startAnimating() 
} 

Answer 1

重构您的代码。您不需要停止viewWillAppear中的活动指示器。你可以隐藏它在viewDidLoad。下面的代码：

@IBOutlet weak var myActivityIndicator: UIActivityIndicatorView! 
@IBOutlet weak var eventsbtn: UIButton! 
@IBOutlet weak var pubsbtn: UIButton! 

override func viewDidLoad() { 
    super.viewDidLoad() 

    eventsbtn.layer.cornerRadius = 8 
    pubsbtn.layer.cornerRadius = 8 
    myActivityIndicator.hidden = true 

} 

@IBAction func getEvents(sender: AnyObject) { 

    myActivityIndicator.hidden = false 
    myActivityIndicator.startAnimating() 
} 

确保IBOutlet的活动指示灯和IBAction用于获取事件是否正确连接界面生成器。

Answer 2

我改变它，它不工作，直到我回去导航

@IBOutlet weak var myActivityIndicator: UIActivityIndicatorView! @IBOutlet weak var eventsbtn: UIButton! @IBOutlet weak var pubsbtn: UIButton! override func viewDidLoad() { super.viewDidLoad() myActivityIndicator.stopAnimating() myActivityIndicator.hidden = true eventsbtn.layer.cornerRadius = 8 pubsbtn.layer.cornerRadius = 8 } @IBAction func getEvents(sender: AnyObject) { myActivityIndicator.hidden = false myActivityIndicator.startAnimating() }

Answer 3

viewDidAppear可能是一个更合适的地方停下来的动画和隐藏微调。