I'm trying to write some code for iOS and Wow! I didn't expect it to be so unfamiliar. Kind of like walking into a familiar city, like London, and discovering that everyone is speaking Dutch and no one speaks English. Weird. I'm slowly getting to grips with the differences and similarities - but I'm a bit perplexed by transforms. As I say, I'm writing a tile based game and the following code works very nicely in Mac OS X:
NSGraphicsContext *context = [NSGraphicsContext currentContext]; [context saveGraphicsState]; id transform = [NSAffineTransform transform]; [transform translateXBy:NSMidX(tileFrame) yBy:NSMidY(tileFrame)]; [transform concat]; [self drawTile:tileFrame]; [context restoreGraphicsState]; Unfortunately, my iOS version doesn't work. That isn't to say that it crashes - it just doesn't produce the expected output. CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSaveGState(context); CGAffineTransform transform; CGAffineTransformTranslate(transform, CGRectGetMidX(tileFrame), CGRectGetMidY(tileFrame)); CGContextConcatCTM(context, transform); [self drawTile:tileFrame]; CGContextRestoreGState(context); I'm sure that my error will be obvious to anyone who isn't a complete newb, but I am - so it isn't obvious to me! And are there any books that you'd recommend that cover these kind of issues, books to assist a Mac OS X developer write for iOS? _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com