iOS -- get pointer from NSString containing address

Question

If I have a pointer to an object foo with address (say) 0x809b5c0, I can turn that into an NSString by calling

NSString* fooString = [NSString stringWithFormat: @"%p", foo].

This will give me the NSString @"0x809b5c0".

What is the easiest way to reverse the process? That is, start with fooString, and get back my pointer to foo.

Answer 1

In its completeness...

To address-string

NSString *foo = @"foo";
NSString *address = [NSString stringWithFormat:@"%p", foo];

And back

NSString *fooAgain;
sscanf([address cStringUsingEncoding:NSUTF8StringEncoding], "%p", &fooAgain);

Answer 2

This snippet worked for me:

NSString *pointerString = @"0x809b5c0";
NSObject *object;
sscanf([pointerString cStringUsingEncoding:NSUTF8StringEncoding], "%p", &object);