swift语言点评八-枚举

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总结:swift中的枚举可以看作变量可以作为case匹配参数的类

 

Enumerations

 枚举的作用:状态列举与匹配

 

枚举值与类型

If a value (known as a “raw” value) is provided for each enumeration case, the value can be a string, a character, or a value of any integer or floating-point type.

You can define a common set of related cases as part of one enumeration, each of which has a different set of values of appropriate types associated with it.

 

Enumerations in Swift are first-class types in their own right.

computed properties

instance methods

继承、协议

 

case

 

简化

 

match

 

.语法

 

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