Ipone received a text message while locking the screen.

All the information received after Apple's mobile phone locks the screen will be displayed, and the push function needs to be turned on.

The open operation is:

Step 1: Click the "Settings" icon on the desktop.

Step 2: Open "Notification"

Step 3: Select the information program.

Step 4: Open the four options of "Apply Icon Mark", "Sound" and "Lock Screen Display" in the notification center.

I hope this helps.