Question

I have an issue of locking my screen whenever I try to refresh my page.

How can I load data from the server and add a spinner to the navigation bar (like instagram) without locking my screen?

Answer 1

To add spinner you can do something like

    UIActivityIndicatorView *ai = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
    self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithCustomView:ai] autorelease]; 
   [ai startAnimating];
   [ai release];

What about locking? I didn’t understand.