Swift for Beginners: Develop and Design by Boisy G. Pitre

Author:Boisy G. Pitre [Pitre, Boisy G.]
Language: eng
Format: azw3, mobi, epub
Publisher: Pearson Education
Published: 2014-11-30T16:00:00+00:00

Structural Integrity

Classes are pretty powerful constructs in Swift for representing objects of various kinds, but the language also offers choices for organizing data in similar ways: structures.

If you’re familiar with C or one of its variants, you’ll recognize structures immediately. They are organizational constructs for holding data, and they look and feel like classes in several ways, including how they are created:

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struct structureName {

// variable and constant definitions

}

Lines 346 to 358 of Figure 5.19 combine an enumeration and a structure together. The Vehicle structure, defined on lines 352 through 355, has two members to represent the type of fuel and type of transmission. Lines 357 and 358 demonstrate how to create variables representing the structure.

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println("Vehicle \(vehicleName) takes \(engine.rawValue)")

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