setObject(_:forKey:)

Adds a given key-value pair to the dictionary.

Declaration

func setObject(_ anObject: Any, forKey aKey: any NSCopying)

anObject:
The value for aKey. A strong reference to the object is maintained by the dictionary.
important:
Raises an Invalidargumentexception if anObject is nil. If you need to represent a nil value in the dictionary, use Nsnull.
aKey:
The key for value. The key is copied (using Copy(with:); keys must conform to the NSCopying protocol). If aKey already exists in the dictionary, anObject takes its place.
important:
Raises an Invalidargumentexception if aKey is nil.