Re: Cocoa equivalent to Quartz's CGImageCreateWithImageInRect(image, imageRect);
Re: Cocoa equivalent to Quartz's CGImageCreateWithImageInRect(image, imageRect);
- Subject: Re: Cocoa equivalent to Quartz's CGImageCreateWithImageInRect(image, imageRect);
- From: "Frederick C. Lee" <email@hidden>
- Date: Tue, 23 Jun 2009 11:59:13 -0700
This is for the iPhone/iTouch environment.
I discovered: CGContextTranslateCTM().
I'll also check out subclassing the scrollview.
Ric.
On Jun 14, 2009, at 7:53 PM, David Duncan wrote:
On Jun 12, 2009, at 11:53 AM, Frederick C. Lee wrote:
Is there a Cocoa/iPhone equivalent to Quartz's
CGImageCreateWithImageInRect(image, imageRect)?
The equivalent is... CGImageCreateWithImageInRect :). Keep in mind
that 9 times out of 10 what people want to use it for is not what
that API is really designed for. If you just want to draw part of an
image, use clipping & translation (either translate the CTM, or move
your drawing rect).
If you want to pan across an image (and it isn't too big) you can
just put the whole thing in a UIImageView contained in a
UIScrollView. If the image is fairly large, then you may want to use
a CATiledLayer (but you will have to draw it via Quartz instead of
via UIImage's draw methods).
--
David Duncan
Apple DTS Animation and Printing
_______________________________________________
Cocoa-dev mailing list (email@hidden)
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:
This email sent to email@hidden