为什么很多 iOS 软件的启动页需要等好几秒？

“Design a plain launch image that improves the user experience. In particular, the launch image isn’t an opportunity to provide:

An “app entry experience,” such as a splash screen

An About window

Branding elements, unless they are a static part of your app’s first screen

Because users are likely to switch among apps frequently, you should make every effort to cut launch time to a minimum, and you should design a launch image that downplays the experience rather than drawing attention to it.

Design a launch image that is identical to the first screen of the app, except for:

Text. The launch image is static, so any text you display in it won’t be localized.

UI elements that might change. If you include elements that might look different when the app finishes launching, users can experience an unpleasant flash between the launch image and the first app screen.

If you think that following these guidelines will result in a plain, boring launch image, you’re right. Remember, the launch image doesn’t provide you with an opportunity for artistic expression. It’s solely intended to enhance the user’s perception of your app as quick to launch and immediately ready for use. For example, Settings and Weather each supply a launch image that is little more than a background image.”