Hey Brian! Got a little error here: “Error Domain=NSURLErrorDomain Code=-1202 "The certificate for this server is invalid. You might be connecting to a server that is pretending to be “api.letsbuildthatapp.com” which could put your confidential information at risk." I changed my App Transport Security Settings to allow arbitrary loads, it doesn’t solve the problem. After a bit more googling I found that people suggest to modify NSURLConnection delegate to ignore bad certificates during NSURLConnection loads. I don’t know much about backend engineering, but I have a feeling that the suitable solution would be to somehow fix the certificates on the server side :)

Hi Brian! Can you tell me the difference between completion: () -> () vs completion () -> Void, thank you!

Hi! My header is not displaying anything and my code is exactly like yours but if I run your demo project it works why?

Hello Brian :) I have these warnings whenever I rotate my simulator 2019-09-02 09:49:59.754474+0200 AppStoreJSON[2504:609105] The behavior of the UICollectionViewFlowLayout is not defined because: 2019-09-02 09:49:59.754611+0200 AppStoreJSON[2504:609105] the item width must be less than the width of the UICollectionView minus the section insets left and right values, minus the content insets left and right values. 2019-09-02 09:49:59.755918+0200 AppStoreJSON[2504:609105] The relevant UICollectionViewFlowLayout instance is <UICollectionViewFlowLayout: 0x7f9518516ad0>, and it is attached to <UICollectionView: 0x7f9518859000; frame = (0 0; 414 896); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0x600003a6a8b0>; animations = { position=<CABasicAnimation: 0x6000034bd480>; bounds.origin=<CABasicAnimation: 0x6000034bd5a0>; bounds.size=<CABasicAnimation: 0x6000034bddc0>; }; layer = <CALayer: 0x600003462be0>; Would You make a separate video abt how to debug such issues, or just write a short answer? I`m a newbie, sorry :C