On 14 Aug 2008, at 1:16 PM, Lee, Frederick wrote:
I tried to convert the integer into a pointer (via casting).
Like this:
NSInteger myID = ABRecordGetRecordID(myABGroup);
[myDict setObject:(NSInteger)myID forKey:groupName];
But I get a compiler warning about the pointer vs integer.
Must I wrap the AB unique key into a NS Object first?
1) Casting an NSInteger to NSInteger isn't a cast at all.
2) NSInteger is a typedef for a plain-old-data type (like int, short,
or long). It isn't a pointer and must not be treated as one.
3) You refer to "myDict" as an NSDictionary. You mean
NSMutableDictionary. NSDictionary, being immutable, doesn't recognize
setObject:forKey:, and you'll get compiler warnings.
4) Re-examine the declaration of setObject:forKey:, either in the
header or in the documentation. Both parameters are (id), a pointer
type for an Objective-C object. Given the semantics of the method (the
object is retained, the key is copied), they have to conform to the
<NSObject> and <NSCopying> protocols, respectively. So for the purpose
of your question, yes, the setObject: parameter has to be of a
subclass of NSObject or NSProxy.
5) To store an integer value in a Cocoa collection, you have to create
an NSNumber object containing the integer's value, such as by +
[NSNumber numberWithInt:]. (Or, in 10.5, given an NSInteger value,
better use +[NSNumber numberWithInteger:].)
6) My perusal of the AddressBook framework docs doesn't turn up an
"ABRecordGetRecordID." The closest I can find is
ABRecordCopyUniqueId(), which returns a CFStringRef/NSString. Perhaps
the function exists on another platform.
— F
--
Fritz Anderson -- Xcode 3 Unleashed: Now Available --
http://x3u.manoverboard.org/
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