Provides an enumerator to access the keys in the dictionary.
- iOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
An enumerator object that lets you access each key in the dictionary.
Here’s how you might use this method.
If you use this method with instances of mutable subclasses of
NSDictionary, your code should not modify the entries during enumeration. If you intend to modify the entries, use the
all property to create a “snapshot” of the dictionary’s keys. Then use this snapshot to traverse the entries, modifying them along the way.
If you want to enumerate the dictionary’s values rather than its keys, use the
It is more efficient to use the fast enumeration protocol (see
NSFast) than this method. Fast enumeration is available in macOS 10.5 and later and iOS 2.0 and later.