Why doesn't Apple mobile phone let SMS pop up automatically?

Why doesn't Apple mobile phone let SMS pop up automatically?

Open the phone to find the settings, and then click on the settings.

Find the notification in the settings and click it.

Find the information and click on it.

Just click Close in the notification center.

How to prevent the screen from rotating automatically:

Open the home screen, slide from bottom to top, and pull out the shortcut settings panel.

Click the screen rotation icon in the upper right corner, light the icon, and a prompt of "Vertical Lock: Open" appears, indicating that the screen is locked, and the horizontally placed mobile phone screen will not automatically rotate.