When I first wrote my simple program using in-app purchase (I did not rewrite this app from C to Swift) when the user selects a purchase from the view controller this calls a simple purchase routine. If there are purchases it will update the state of the view controller's buyButton to allow a purchase. It also updates the productTitle and productDescription. This used to work, but with the newer Xcode I am not allowed to change the state of the button from within the thread: "Modifications to the layout engine must not be performed from a background thread after it has been accessed from the main thread." How do I enable the button then? Is using dispatch_async the correct solution? Below is the routine that is called from the paymentQueue: (void) productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response{     NSArray *products = response.products;     NSLog(@"in productsRequest");     myProduct = products;     if (products.count != 0)     {         _product = products[0]; //THIS IS WHAT IS CAUSING THE ISSUE *******         buyButton.enabled = YES;         _productTitle.text = _product.localizedTitle;         _productDescription.text = _product.localizedDescription;     }     else{         _productTitle.text = @"Product not found";     }     products = response.invalidProductIdentifiers;     for (SKProduct *product in products)     {         NSLog(@"Product not found: %@", product);     } } Should I be doing something like this for the UI changes: dispatch_async(dispatch_get_main_queue(), ^{             self->buyButton.enabled = YES;             self->_productTitle.text = self->_product.localizedTitle;             self->_productDescription.text = self->_product.localizedDescription;         });

It has been 2 years since I updated one of my apps. I am trying to create a distribution provisioning profile. I am seeing that the generic wildcard profile is no longer an option. If I have 30 apps do I need to create 30 distribution profiles? Is wildcard truly not an option?