Learn notes from scratch (Day 36)--Static methods

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static methods are similar to static properties,Swifta static method , also known as a type method , is defined in. Static methods are defined in the same way as static properties, and the keywords used by the static methods of enumerations and structs areStaticthe keywords used by class static methods areclassorStatic, If you use Staticis defined, themethod cannot be overridden in a subclass ( Override); If you useclassis defined, themethod can be overridden by a quilt class.  

static method of structure body

Look at an example of a struct static method, with the following code:

struct account {        var owner: string =   "Tony"                 // Declaring instance attribute account name     static var interestrate: double = 0.0668 // Declaring a static property interest rate         static func interestby (amount: Double)  -> double {//Defining static Methods          return  Interestrate * amount    }        func  messagewith (amount: double)  -> string {      // Defining instance Methods                 let  interest = account.interestby (amount)         return   "\ (Self.owner)   interest is \ (interEST) "            }} //calls the static method print ( Account.interestby (10_000.00))  var myaccount = account ()     // Invoke instance method print (myaccount.messagewith  (10_000.00))

Enumerate static methods

Look at an example of an enumeration of static methods, with the following code:

Enum account (case Bank of China, ICBC case) CCB case ABC static var interestrate:double = 0.06 68//Declare static property rate static Func Interestby (amount:double), Double {//define static method return InterestRate * Amoun T}}//Call static method print (Account.interestby (10_000.00))//Call static method

As can be seen from the example, there is no difference in the use of static methods for structs and enumerations.

Class static methods

look at a class Static example of a method, the code is as follows:

Class Account {var owner:string = "Tony"//username//can be replaced by static class Func Interestby (amount:do    uble), Double {//Use keyword class to define static method return 0.08886 * Amount}}//Call static method print (Account.interestby (10_000.00)) Calling a static method

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Learn notes from scratch (Day 36)--Static methods