Activity indicator in iOS launch screen doesn't animate

问题

Activity indicator in launch screen doesn't animate. How to make it work? I can't do startAnimating() because cannot assign class to launch screen. The checkbox in the attribute inspector does't work as well.

回答1:

The launch screen is not a splash screen. It is, in effect, just a picture, hiding the gap between the time the user summons your app and the time your app runs. You cannot do anything in the launch screen because, by definition, if the launch screen is visible your app is not yet running.

来源：https://stackoverflow.com/questions/42213612/activity-indicator-in-ios-launch-screen-doesnt-animate