Camera app opens to a black screen after iOS 18.4

Rather than a re-boot, have you tried a forced restart? 

Force restart iPhone - Apple Support

This is different from a simple Power Off. I had to continue holding the button down for while after the “Power Off” message came up.

It’s unlikely a software/iOS bug. I’d have your iPhone diagnosed by Apple. It can be done in person at an Apple Retail Store or at an Apple Authorized Service Provider. You can also contact Apple Support and request remote diagnostics.

If you’re in the US please call  1-800-MY-APPLE or outside the US, consult the support articles below.

Contact Apple for support and service - Apple Support

Genius Bar Reservation and Apple Support Options - Apple

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Official Apple Support

It might me an indication of the camera failing or just an error in the updated code. Monitor the cameras performance but if it continues to happen and there is an increase in the frequency of it happening, the camera module is going out and will need replacement.

It could be the apps too. They may need to be updated or the app has a bug. This seems more common in social media apps than more pro like, still and video camera apps. All my paid third party camera apps are working fine. Facebook, yah, not so much.

Hi everyone! iPhone 12 Pro 256GB user here. Last week I had the same problem with the camera, while recording some videos in a circus show, the camera stopped working, showed a blank screen. Did a reset and looked like it came back to normal, but the camera app was freezing. I still had iOS 18.3.2. I read online that I should update to 18.4 and I did. It looked again like it went back to normal. Then today I wanted to take a picture, I noticed that the camera app started at 2x and it didn’t show the 0,5x 1x 2x options. Did a hard reset, went back to normal for like 30 secs then on Settings it showed an error message regarding the camera that apple wasn’t able to recognize it as a genuine part. Now it works but without the 0,5x option. It is a bit frustrating to be honest. This iPhone never had a service, didn’t fall and never had a problem till after iOS 18 (apparently). It would be great if apple would fix this, if it’s a bug.

Did you ever let Apple run diagnostics on your iPhone?

I m having same issue. Thy ran diagnostics 3 times and after a month of to n fro conversation and escalating issue to higher level, thy said hardware issue. However thy know their software has problem, thy r making profit forcing iphone users to buy new camera hardware,

its their fault issuing faulty software and thy want to fix it with out money.

“Thief”

hope someday concerned govt body will look into this scam apple has being doing. Nad make them pay

How come everyone facing the same issue around the globe;

have their camera phase out n need replacement, only after updating to ISO 18…

should not Apple look into it

rather than Trying to profit with sale of new camera hardware.

16 Pro user here, can confirm this is happening to me as well. So far, I’ve only noticed it in third party apps. So far, I was able to fix with a phone restart. But will see if it recurs.

I’m having this exact problem ever since updating to 18.4.1. The macro feature has vanished as well