Apple is not getting out of the hardware business, they are supplementing it with services revenue - most of which depends on their hardware ecosystem.
Given that, based on many public metrics (photos posted on various sharing and social media sites, as examples), the iPhone is the number one camera in the world, I do not think they need to buy anyone if they saw a reason to enter the market. Again, no one has given any reason that it would make any sense for them to bother entering a small, and declining market. I am pretty sure that Apple makes more profit on accessories than Canon makes on everything.