Swift - Data Type Using Enumerations

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Introduction

An enumeration is a user-defined type with a group of named constants.

The following code creates an enumeration containing all the valid colors. 

enum MyColor {
      case Black
      case White
      case Red
      case Green
      case Yellow
}

The MyColor enumeration contains five cases also known as members: Black , White , Red , Green , and Yellow.

Each member is declared using the case keyword.

You can group the five separate cases into one single case, separated using commas , 

enum MyColor {
   case Black ,  White,  Red ,  Green,  Yellow
}

You can now declare a variable of this enumeration type: 

var codeColor:MyColor

To assign a value to this variable, specify the enumeration name, followed by its member: 

codeColor = MyColor.Yellow

In Swift, you need to specify the enumeration name followed by its member.

You can omit the enumeration name by simply specifying its member name: 

codeColor = .Yellow

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