UIActivityIndicatorView not showing up

Question

I am trying to implement a UIActivityIndicatorView that runs while the user is in the middle of an in app purchase. For some reason the UIActivityIndicatorView is not showing up even though I have made if a subview of the view.

class RemoveAdsViewController: UIViewController {

@IBAction func btnAdRemoval(sender: UIButton) {
    let buyProgress = UIActivityIndicatorView(activityIndicatorStyle: .White)
    buyProgress.center = self.view.center
    self.view.addSubview(buyProgress)
    buyProgress.startAnimating()
    print(buyProgress)
    PFPurchase.buyProduct("", block: { (error:NSError?) -> Void in
        if error != nil{
            let alert = UIAlertController(title: "Error", message: error?.localizedDescription, preferredStyle: UIAlertControllerStyle.Alert)

            alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))

            self.presentViewController(alert, animated: true, completion: nil)
        }
    })
    buyProgress.stopAnimating()
    buyProgress.removeFromSuperview()
}

PFRestore:

restoreProgress.startAnimating()
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), {
       PFPurchase.restore()
       dispatch_async(dispatch_get_main_queue(), {
           restoreProgress.stopAnimating()
       })
 })

See all of the Related questions shown to the right --> You should check those. This issue has been asked and answered before. — rmaddy
– rmaddy, Commented Oct 20, 2015 at 22:19
@rmaddy I've checked them already and the answers did not solve my problem which is why I posted my own question. — wxcoder
– wxcoder, Commented Oct 20, 2015 at 22:19

rmaddy · Accepted Answer · 2015-10-20 22:31:10Z

2

After taking another look, the problem is simple. You stop and remove the activity indicator much too soon. You need to stop and remove it in the completion block.

@IBAction func btnAdRemoval(sender: UIButton) {
    let buyProgress = UIActivityIndicatorView(activityIndicatorStyle: .White)
    buyProgress.center = self.view.center
    self.view.addSubview(buyProgress)
    buyProgress.startAnimating()
    print(buyProgress)
    PFPurchase.buyProduct("", block: { (error:NSError?) -> Void in
        buyProgress.stopAnimating()
        buyProgress.removeFromSuperview()

        if error != nil{
            let alert = UIAlertController(title: "Error", message: error?.localizedDescription, preferredStyle: UIAlertControllerStyle.Alert)

            alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))

            self.presentViewController(alert, animated: true, completion: nil)
        }
    })
}

You also need to make sure that the contents of the completion block is being done on the main thread.

edited Oct 20, 2015 at 22:31

answered Oct 20, 2015 at 22:25

rmaddy

319k44 gold badges548 silver badges591 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

wxcoder Over a year ago

This does get the activity indicator to show up, but after the transaction is completed the UIActivityIndicatorView remains spinning, because there's no error

wxcoder Over a year ago

I put it in the wrong place, my mistake. Thank you.

wxcoder Over a year ago

I attempted to so something similar for PFPurchase using the link you had showed me initially but I still run into the same problem. Could you take a look? I updated the OP.

rmaddy Over a year ago

Looks like PFPurchase.restore() returns immediately.

Luke De Feo · Accepted Answer · 2015-10-20 22:28:24Z

The problem is you do this

buyProgress.startAnimating()

followed by this immediatly

buyProgress.stopAnimating()

because PFPurchase.buyProduct is an async call it will return immediately and your not seeing your activity indicator animate as its all happening in one run loop cycle.

you need to move

buyProgress.stopAnimating()

inside the closure like so

PFPurchase.buyProduct("", block: { (error:NSError?) -> Void in
            if error != nil{
                let alert = UIAlertController(title: "Error", message: error?.localizedDescription, preferredStyle: UIAlertControllerStyle.Alert)
                buyProgress.stopAnimating()

                alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))

                self.presentViewController(alert, animated: true, completion: nil)
            }
        })

Collectives™ on Stack Overflow

UIActivityIndicatorView not showing up

2 Answers 2

4 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

4 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related