December 2015
Intermediate to advanced
400 pages
13h 3m
English
Content preview from Swift Programming: The Big Nerd Ranch Guide
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Protocol Conformance
As noted earlier, the syntax for protocol conformance looks exactly the same as the syntax you use to declare a class’s superclass, as seen in Chapter 15. This brings up a few questions:
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What types can conform to protocols?
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Can a type conform to multiple protocols?
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Can a class have a superclass and still conform to protocols?
All types can conform to protocols. You made a structure (Department) conform to a protocol. Enums and classes can also conform to protocols. The syntax for declaring that an enum conforms to a protocol is exactly the same as it is for a struct: a colon and the protocol name follow the declaration of the type. (Classes can be a little more complicated. We will get to them in a moment.) ...
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