Swift Object ModelLesson 32Free preview

Access Control

This lesson is part of Swift · All levels

Summary

This lesson discusses Access Control in Swift to limit code accessibility between source files and modules. Swift provides five levels of access control: open, public, internal (default), fileprivate, and private. Proper access control settings ensure the security of the interface and library encapsulation.

Key points

Level of access control: open, public, internal, fileprivate, and private
The default access rate if not written is 'internal' (available throughout the target module)
'private' restricted access only within the curly braces declaration where it was made and its extension
'fileprivate' restricts access only to lines of code within the same .swift file
'open' only applies to classes that allow subclassing from outside the module

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