Ways to Fix iPhone Camera Black Screen
There are a few things you can try if your iPhone camera is showing a black screen:
Restart your iPhone
Press and hold the power button until the “slide to power off” slider appears, then slide the slider to turn off your device. Wait a few seconds, then press and hold the power button again to turn it back on.
Make sure the camera app is up to date
Go to the App Store, search for “Camera,” and tap “Update” if an update is available.
Check for a software update
Go to Settings > General > Software Update and install any available updates.
Force quit the camera app
Double-click the Home button (or swipe up from the bottom of the screen on an iPhone with Face ID) to view all open apps. Find the camera app, then swipe up on it to close it.
Reset the settings on your iPhone
Go to Settings > General > Reset > Reset All Settings. This will reset all of your iPhone’s settings to their default values, but it won’t delete any of your data.
Check for physical damage
If none of the above steps helped, there may be a problem with the hardware in your iPhone’s camera. Check for any visible damage, such as cracks or scratches on the camera lens. If you see any damage, you may need to take your iPhone to a repair shop or contact Apple for further assistance.
I hope these suggestions help! Let me know if you have any other questions.