Question

Hi am developing jigsaw puzzle for iPhone.

Here i have almost completed the app except finding whether the jigsaw is complete.

Here each piece is a UIImageView, and it has unique tags.

I have tried using x y coordinates, but its no use because user can start fix the puzzle from anywhere in the screen.

So, any idea how to detect whether the images are arranged correctly?

Edit: Thanks a lot all finally i have done it using co ordinates. by tracing location and tags.

Answer 1

Presumably, you have some sort of ‘snap to grid’ mechanism to put each piece precisely into the correct position once it’s close (as would effectively occur with a real jigsaw). Let’s say that this is defined as a specific x,y co-ordinate for the origin of the UIImageView for each piece.

Then, when each piece is in it’s correct position (snapped to it’s position), set a boolean ‘inPlace’ for that piece to YES.

When the value for ‘inPlace’ for all pieces is YES, the jigsaw is complete.