Load entire image and use CATiledLayer

Question

Hello,

I'm not sure I did understand that very well in the Apple doc. I'm considering using CATiledLayer to display a JPEG image. However, I only have an entire JPEG file at my disposal and no small tiles. Is it still possible to use a CATiledLayer and let it "tile" the JPEG?

Thanks!

Answer 1

The easier way is to just downscale the image until it fits (I think devices support up to 2044x2044 or so). You can create subimages of a CGImage with CGImageCreateWithImageInRect()

Answer 2

No. You will have to tile them yourself, unfortunately. The WWDC 2010 videos on Core Animation discuss how to do this and in their sample code, they demonstrate how to use a CATileLayer when the tiles already exist.

Correction

I meant to say watch the Scroll View session. It's session 104 "Designing Apps with Scroll Views"