Question

Possible Duplicate:
How to retrieve the values for the particular key from CFMutableDictionary

In C++:

typedef struct
{
     unsigned short wId;
     bool bPersists;
     unsigned short uPeriod;
     bool bStop;
}stTimer;

unsigned short wId;
stTimer pEvent;
CTypedPtrMap<CMapWordToPtr,WORD,stTimer*>m_cIdMap;
if(m_cIdMap.Lookup(wId,pEvent))
{
    //find and remove the event pEvent;
}

I need to port the same functionality to Objective-C

I could be able to set and get the values into the CFDictionary, but I need to do look ups into the dictionary with the wId(key) and the pEvent(value).

Answer 1

You would use an NSDictionary and box the keys with NSNumber (assuming you have created a class to represent your stTimer struct.

[myDictionary setObject: myStTimer forKey: [NSNumber numberWithUnsignedInt: [myStTimer wId]]];

StTimer* mySTTimer = [myDictionary objectForKey: [NSNumber numberWithUnsignedInt: anId]];

I don’t see any point of going for a lower level interface. You might as well stick with the C++ version.