nsmutabledictionary

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 a new key value... Any help would be appreciated. Use NSMutableDictionary NSMutableDictionary *yourMutableDictionary = [NSMutableDictionary alloc] init]; [yourMutableDictionary setObject:@"Value" forKey:@"your key"]; Update for Swift: The following is the exact swift replica for the code mentioned above var yourMutableDictionary = NSMutableDictionary() yourMutableDictionary.setObject("Value", forKey: "Key") But i would suggest you

Now I know that when swift compiles it just makes a NSDictionary, but the NSDictionary and Swift dictionaries have different syntax. Is there a way (through a loop or something) to convert a NSDictionary to a swift dictionary of the same type for <key, value> ? OR Is there a way to convert this to a Swift dictionary instead of NSDictionary? let jsonDict = NSJSONSerialization.JSONObjectWithData(jsonData, options: nil, error: &error) as NSDictionary use: let jsonDic = NSJSONSerialization.JSONObjectWithData(jsonData, options: NSJSONReadingOptions.MutableContainers, error: &error) as Dictionary

Is it possible to observe (subscribe to) changes to values stored under different keys in an NSMutableDictionary? In my case the keys would already exist when the subscription is initiated, but the values change and I would like to be notified in this case. I would like the key of the changed value in the notification. I assume that if my dictionary keys were all NSString instances I could just subscribe to each key path individually. But what if my keys are non-strings? Am I out of luck in that case? That's an interesting idea. I can't find anything in NSDictionary or NSDictionaryController

I'm having trouble in writing mutable dictionary to a file. Here's the code that I'm writing. I'm reading the file like below: (first time when app is ran, it won't have any data) NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString* documentsDirectory = [paths objectAtIndex:0]; self.favSaveFilePath = [[NSString alloc] initWithString:[documentsDirectory stringByAppendingPathComponent:@"Favorites.plist"]]; if([fm fileExistsAtPath:favSaveFilePath]) { favoriteJokesDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:self