We now have the Swift app extenstion version working and it should be available on or soon after the day iOS8 goes live.
To run a photo app extension, you run an app that has photo editing and app extensions allowed. Here is an example in the xcode iOS8 simulator where we run the apple app Photos, and select an image and then hit the "edit button"
|Here we can use the Apple editing options at the bottom. Instead we hit the upper left button|
|This brings up the available photo editors that can be used in the app, and we choose ours.|
|We say done and return to the editor. Now our app extension is out of the picture and we are in just the Photos app. We could still cancel. Or we could run pic! on its own output. Or we could run another app extension.|
|We say done and back to browsing in Photos with our saved changes.|