MBProgressHUD is a drop-in Objective-C class for iOS that displays a translucent HUD with a spinner, labels, or progress bars during background operations, serving as a polished substitute for private UIKit HUDs. MBProgressHUD works on iOS 9.0+. It depends on the following Apple frameworks, which should already be included with most Xcode templates. The main guideline you need to follow when dealing with MBProgressHUD while running long-running tasks is keeping the main thread work-free, so...