swift语言点评八-枚举

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