My camera doesn't work in messages, only shows black screen. Iphone6

Hello there, Markcollinshale.

The following Knowledge Base article offers up some great steps for troubleshooting issues with iOS not functioning as expected, which should help in resolving your issue with the camera in Messages:

iOS: Not responding or does not turn on

1. If a single application is not responding or stops responding when it opens, you can force it to close.
2. If the device is unresponsive or if certain controls aren't working as expected, restart your device.
3. If the device remains unresponsive or does not turn on (or power on), reset your device.
4. If there is no video or if the screen remains black, verify that the device has enough charge to turn on:
   1. If you are using an iPad, ensure that it's connected to the USB Power Adapter supplied with the device.
   2. Let it charge for at least twenty minutes, then see if it starts normally.
   3. If there is no image on the screen, press the Sleep/Wake button to attempt to wake the device.
   4. If the screen displays a red battery icon, continue charging the device until the battery is fully charged. Learn more about charging iPhone and iPod touch, or iPad.
5. If the above steps do not resolve the issue, or the if the screen remains black or shows a persistent Apple logo, try restoring with iTunes:
   1. Connect the device to your computer and open iTunes.
   2. If the device appears in iTunes, select and click Restore on the Summary pane. Learn more about restoring iOS software.
   3. If the device doesn't appear in iTunes, try to force the device into recovery mode, and then restore it.
6. If the above steps do not resolve the issue, contact Apple.

Thanks for reaching out to Apple Support Communities.

Cheers,

Pedro.

I too have this issue with my Iphone 6. I called the tech at Apple customer care who said she had not heard of this issue. We went through the steps that Pedro mentions above and I am also going to attempt the recovery. Markcollinshale did you get your issue resolved with recovery?
Thanks L

I totally have the same issue and its a pain!! I have to restart the app to get it to work. Occasionally it will take a picture while on the black screen thats blurry and then after i tell it to retake it works. Sure hope they acknowledge this problem soon!!

I have same problem ever since I upgrade to IOS 8.1 . For every picture I want to take I have to reset the messaging app. Its very annoying.

I will try to restore the IOS....

I also have this issue. I found, however, if I go ahead and take the picture even though the screen is black, then press retake, I find that the screen now is the normal and I can take a normal picture.