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objective-ccocoa-touchcore-animation

How do I set the contents of a CALayer to a CGImageRef?

I want to set the contents of a CALayer to an image. The CALayer has a contents property The documentation on that property says that "a layer can set this property to a CGImageRef to display the image as its contents." But the property takes an id so in Xcode I get the following issue:

Semantic Issue: Incompatible pointer types assigning to 'id' from 'CGImageRef' (aka 'struct CGImage *')

How can I assign a CGImageRef to the contents property when it only takes an id? What am I missing here?

Solution

  • Explicitly casting CGImageRef to id should fix the warning. For example,

    CGImageRef imageRef;

...

layer.contents = (id) imageRef;

    should be working fine.