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 stringWithForm         


        

Answer 1

Use an NSMapTable instead:

MyClass* p = [[MyClass alloc]init];
NSMapTable* map = [NSMapTable mapTableWithKeyOptions:NSMapTableStrongMemory valueOptions:NSMapTableStrongMemory];
[map setObject:whateverValue forKey:p];
// ...
for(MyClass* key in map) {
// ...
}