I was wrong about the iPhone 5 camera, as I was blaming the purple flare when photographed directly into the sun to chromatic aberration, however:
No, definitely not. Typically visible towards the edges of the frame especially in images taken using wide-angle lenses, chromatic aberration takes the appearance of a green-and-magenta or blue-and-yellow “fringing” around peripheral scene elements. It looks nothing like the iPhone 5’s purple haze.
Really, our advice is not to worry. Just do what you should do anyway, and avoid putting bright lights near the edge of the frame when shooting.
You could never photograph into the sun or bright light sources. In the “old” analogue time that was the best way to get a totally blank photo, in these days you just risk to burn your sensor. Normally you just use a lens hood to photograph almost directly into the sun. Although on the iPhone it is a bit harder to do that it is still preferable. Let alone for not darkening the rest of the image too much.
This makes “photo-gate” officially non-existent.