Swift-----Static, class-defined classes method

(1) class can only be used for classes, static can be used for classes, and can also be used for structs, enumerations

(2) Class-modified methods can be inherited, static modified methods cannot be inherited

(3) method names of class methods and instance methods can be the same

class Teacher {        static  func A () {        }        class  func B () {        }        func B () {        }        func A () {        }}class  student:teacher { //class-modified method can be inherited The static modified    method cannot be inherited by the  overrideclass  func B () {        }}struct  Tool {    //struct cannot use class    static  func A () {        }}

Swift-----Static, class-defined method