10.8. Retrieving and Setting a Person’s Address Book Image
Problem
You want to be able to retrieve and set the images of address book people entries.
Solution
Use one of the following functions:
ABPersonHasImageData
Use this function to find out if an address book entry has an image set.
ABPersonCopyImageData
Use this function to retrieve the image data (if any).
ABPersonSetImageData
Use this function to set the image data for an entry.
Discussion
As mentioned in this recipe’s Solution, we can use the ABPersonCopyImageData
function to retrieve
the data associated with an image of a person entry in the address
book. We can use this function in a method of our own to make it more
convenient to use:
- (UIImage *) getPersonImage:(ABRecordRef)paramPerson{ UIImage *result = nil; if (paramPerson == NULL){ NSLog(@"The person is nil."); return NULL; } NSData *imageData = (__bridge_transfer NSData *) ABPersonCopyImageData(paramPerson); if (imageData != nil){ UIImage *image = [UIImage imageWithData:imageData]; result = image; } return result; }
The ABPersonSetImageData
function sets the image data for a person entry in the address book.
Since this function uses data, not the image itself, we need to get
NSData
from UIImage
. If we
want the data pertaining to a PNG image, we can use the UIImagePNG
Representation
function to retrieve the
PNG NSData
representation of the
image of type UIImage
. To retrieve JPEG image data from an
instance of UIImage
, use the
UIImage
JPEGRepresentation
function. Here is the method ...
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