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Initialization | Documentation

docs.swift.org · 92 words · saved by 1 readers

Initialization is the process of preparing an instance of a class, structure, or enumeration for use. This process involves setting an initial value for each stored property on that instance and performing any other setup or initialization that’s required before the new instance is ready for use. You implement this initialization process by defining initializers, which are like special methods that can be called to create a new instance of a particular type. Unlike Objective-C initializers, Swift initializers don’t return a value. Their primary role is to ensure that new instances of a type are correctly initialized before they’re used for the first time. Instances of class types can also implement a deinitializer, which performs any custom cleanup just before an instance of that class is deallocated. For more information about deinitializers, see Deinitialization. Classes and structures must set all of their stored properties to an appropriate initial value by the time an instance of

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