表格控制器之间的活动指示器视图-Swift 2

Question

I have built a project has many tableViewControllers connected together, my project is based on parse so it's taking a long time before it is downloaded and appears.

In the main time I want UIActivityIndicatorView to appear as an alert until the tableViewController appears. I have found this code:

var alert: UIAlertView = UIAlertView(title: "Title", message: "Please wait...", delegate: nil, cancelButtonTitle: nil);


    var loadingIndicator: UIActivityIndicatorView = UIActivityIndicatorView(frame: CGRectMake(50, 10, 37, 37)) as UIActivityIndicatorView
    loadingIndicator.center = self.view.center;
    loadingIndicator.hidesWhenStopped = true
    loadingIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray
    loadingIndicator.startAnimating();

    alert.setValue(loadingIndicator, forKey: "accessoryView")
    loadingIndicator.startAnimating()

    alert.show();

It's working fine but I have two problems:

1 - I can not stop it until click okay -> I want stop and hidden auto after appear data

2- it is starting and appearing after go in to the tableviewcontroller -> I want start before go

Answer 1

When it is time for the alert to go away, use this:

alert.dismissWithClickedButtonIndex(0, animated: true)

Note that UIAlertView is deprecated for iOS 9