How to insert a new key with value in dictionary

Question

I want to insert a key with a corresponding value in an existing dictionary...

I am able to set values for existing keys in the dictionary, but I am not able to add

Answer 1

Hi I am getting the content from json in the format of dictionary and from that i am adding the content into some other dictionary

  //here contract is my json dictionary 
  NSArray *projectDBList =[contract allKeys];//listing all the keys in dict 

  NSMutableDictionary *projectsList=[[NSMutableDictionary alloc]init];

  [projectDBList enumerateObjectsUsingBlock:^(NSString * obj, NSUInteger idx, BOOL *stop) {

  [projectsList setObject:[contract objectForKey:obj] forKey:obj];

  }];