1, restart the phone.
Apple's mobile phone flashes back when it opens the APP, which is often caused by insufficient system resources. For the small partners with insufficient memory on the iPhone, what they need to do is to clean up the APP in the background. The most direct and effective way is to restart the phone.
2. Upgrade or reinstall the software
If a software often has flashback problems and other software is running normally, you can try to upgrade this software, or uninstall it first and then reinstall it, which can basically solve the flashback problem.
3. Restore the mobile phone
Another way to solve the flashback is to try to restore all the settings of the mobile phone and try to solve the problem in this way. Turn on iPhone
"Settings" on the home screen, then find "Restore" in the General Manager, and finally click "Restore all settings". The function of this function is to restore all the settings of the mobile phone to the original state, but it will not delete the existing data and media on the mobile phone.