You can use the ImageIO framework to do this:
CGImageSourceRef isrc = CGImageSourceCreateWithData((CFDataRef)data, NULL);
if (isrc) {
CFStringRef imageType = CGImageSourceGetType(isrc);
// see if imageType is among known types such as kUTTypeJPEG,
kUTTypeTIFF, kUTTypePNG
CGImageSourceRelease(isrc);
}
-Ken
On Tue, Aug 5, 2008 at 12:36 AM, Wayne Shao <[EMAIL PROTECTED]> wrote:
> Hello,
>
> from "Address Book Objective-C Framework Reference"
> http://developer.apple.com/documentation/UserExperience/Reference/AddressBook/Classes/ABPerson_Class/Reference/Reference.html#//apple_ref/occ/instm/ABPerson/imageData
>
> The imageData method returns NSData*. Is there anyway to know the
> image type (e.g, PNG, TIFF, or JPEG) of the data?
>
> Wayne
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