NSDictionary with integer as number

I have a NSDictionary with the following layout:

{
  1:{
    ... some d开发者_运维问答ata ...
  }
  ...
}

I have a NSNumber object with a integer value of 1, but when I do [my_dict objectForKey:my_number] it returns null.

If I try and convert NSNumber to a integer via [my dict objectForKey:[my_number intValue]] I get a warning and the program crashes when it reaches that part of the code.

Any help would be greatly appreciated.

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Keys in a NSDictionary or NSMutableDictionary must be objects, like NSNumber. They cannot be primitive data types, like int.

http://developer.apple.com/library/ios/#documentation/Cocoa/Reference/Foundation/Classes/NSDictionary_Class/Reference/Reference.html

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Looks like you're trying to use an integer as the key in your NSDictionary. This would be correct with an NSArray, with an NSDictionary actually needs a proper object as a key.

You might have more success in this particular case feeding that data into an NSArray, and accessing it with:

id *someData = [my_array objectAtIndex:1];