I just used UIAlertView to show "loading..." with a progress bar showing how much data my app is loading so far. And as the HIG says, I'm doubt Apple reviewers will approve that action. Since the alert is not supposed to "alert" users when things are going on normally.
So, if I override it with a custom background, would the Apple reviewers still reject it? My code is something like this:
@interface MyCustomAlert : UIAlertView { UILabel *alertTextLabel; UIImage *backgroundImage; }