5s Camera issue: When I click camera app, it opens then immediately closes

You should try holding the home button and the sleep button until you see the Apple Logo . If it still does not work you should try a restore.

 

And if the Doctor's advice doesn't work, file a warranty claim immediately. The window on the 1 year warranty on the 5S is closing fast if you got yours on launch day.

 

Couple of ideas:

The first thing to try a hard reset. To do this simply hold and press the home button and the sleep/wake button at the same time. Hold them down for 15-20 seconds. Let go when you see the Apple logo appear.

If that doesn’t solve the issue, I would then try selecting “Reset All Settings.” To do this navigate on your phone to Settings —> General —> Reset —> Reset All Settings. Keep in mind that when you choose this option, it will wipe out all passwords and other “stored” info on your device!

If neither of these work, I think a trip to the Apple store is in order.