Shutdown restart
Try to shut down and restart the Apple phone first, and then check whether the screen of the phone is back to normal.
Restore the mobile phone system
Open Apple's mobile phone settings-enter GM-restore-erase everything, restore the mobile phone system, and see if this problem can be solved. In the restore system, the mobile phone will clear all the contents, and pay attention to the backup of the information on the mobile phone. Or use Apple's iTunes software to operate on the computer, and select Restore Backup on iTunes software to restore the mobile phone system.
Send it to after-sales maintenance
If there is something wrong with the phone hardware, such as the phone accidentally falling to the ground, stripes will appear on the screen, which may be caused by loose internal cables and poor screen contact. It is recommended to send it to Apple for after-sales maintenance and let the technicians help you solve it.