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A really quickly trying to add a key to a .plist. I almost have it, what is the correct version of the fourth line?
NSString *path = [[NSBundle mainBundle] pathForResource:@"Favourites" ofType:@"plist"];
NSDictionary *rootDict = [[NSDictionary alloc] initWithContentsOfFile:path];
[rootDict addKey:@"Test"]; //guessed code
[rootDict writeToFile:path atomically: YES];
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[myDictionary setObject:nextValue forKey:myWord]; You can simply say: myDictionary[myWord] = nextValue; Similarly, to get a value, you can use myDictionary[key] to get the value (or nil).
Use -mutableCopy . NSDictionary *d; NSMutableDictionary *m = [d mutableCopy]; Note that -mutableCopy returns id ( Any in Swift) so you will want to assign / cast to the right type. It creates a shallow copy of the original dictionary.
Creating NSDictionary Objects Using Dictionary Literals In addition to the provided initializers, such as init(objects:forKeys:) , you can create an NSDictionary object using a dictionary literal. In Objective-C, the compiler generates code that makes an underlying call to the init(objects:forKeys:count:) method.
An object representing a dynamic collection of key-value pairs, for use instead of a Dictionary variable in cases that require reference semantics.
You can't add elements to a NSDictionary, you need to use a NSMutableDictionary then use the setObject:forKey: method.
[rootDict setObject:someObject forKey:@"someKey"];
See NSMutableDictionary class reference
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