Storing Multiple Values to a Single Key in NSDictionary

Question

In my application i am getting data from the server.i parsed the data and added to individual arrays. Here i am having 2 arrays.

For example

Array A : @"1",@"2",@"3",@"2",@"3",@"4",etc.. Array B : @"A",@"B",@"C",@"D",@"E",@"F",etc..

Now i want to create a Dictionary with Array A as keys and Array B as Values. i am trying to create Dictionary like this:

dataDict = [NSDictionary dictionaryWithObjects:B forKeys:A];

But it is giving only single value for a single Key. here how can i store multiple values for a single key.

Answer 1

For Different keys its working. But my problem is Storing multiple values for single key.

You can't store multiple values for a single key directly -- dictionaries can only have one value per key. What you can do is store an array as the value. So, you could create a mutable dictionary and add the keys and values one at a time. Make the values all mutable arrays, and check for an existing value for the given key before setting it. If you find one, add the new value to the array.