Can Objective-C protocols have properties?
You can have properties in a protocol, provided every class that conforms to your protocol have a corresponding @synthesize for that property, or provide a getter and setter.
Will Objective-C become obsolete?
Programming in Objective-C will not become obsolete any time soon because, thanks to its 20 years of existence, it has a large code base, a number of apps maintained, and third-party framework with Objective-C at its core. These solutions and libraries are unlikely to be rebuilt from scratch with a new language.
How do you name a protocol?
Protocols primarily provide a group of behaviors unrelated to a specific class, and should be named to describe the group of behaviors. Typically protocol names are in the gerund form, ending in “ing”.
What is protocol in Objective-C with example?
Protocols are implemented in the classes conforming to the protocol. A simple example would be a network URL handling class, it will have a protocol with methods like processCompleted delegate method that intimates the calling class once the network URL fetching operation is over. A syntax of protocol is shown below.
How do you name a swift protocol?
Protocols that describe what something is should read as nouns (e.g. Collection ). Protocols that describe a capability should be named using the suffixes able , ible , or ing (e.g. Equatable , ProgressReporting ). The names of other types, properties, variables, and constants should read as nouns.
How do you name a delegate in Swift?
Naming Conventions Therefore the name of a delegate protocol must start with the class name. Method names start with the class name (without a prefix) and first argument must be the delegating object itself.
What is Objective-C protocol?
Objective-C allows you to define protocols, which declare the methods expected to be used for a particular situation. This chapter describes the syntax to define a formal protocol, and explains how to mark a class interface as conforming to a protocol, which means that the class must implement the required methods.