swift-static Method-Standby

Static methods are similar to static properties, anda static method , also known as a type method , is defined in Swift. Static methods are defined in the same way as static properties, where the keywords used by the enumeration and static methods of the struct are static , the keyword used by the class static method is class or static, and if the static definition is used , the method cannot be overridden in a subclass ( override); If you use the class definition, the method can be overridden by the quilt class.  

static method of structure body

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

[HTML]View PlainCopyprint?

2. struct Account {
6. var owner: String = "Tony"//declaring instance attribute account name
10. static var interestrate: Double = 0.0668//Declare static property interest rate
18. static func Interestby (amount:double)-> Double {//define static method
26. Return InterestRate * Amount
30. }
38. Func Messagewith (amount:double)-> String {//define instance method
46. Let interest = Account.interestby (amount)
50. Return "\ (self.owner) interest is \ (Interest)"
58. }
62. }
70. Calling a static method
74. Print (Account.interestby (10_000.00))
82. var myAccount = Account ()
86. Invoking instance methods
90. Print (Myaccount.messagewith (10_000.00))

Enumerate static methods

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

[HTML]View PlainCopyprint?

2. Enum Account {
10. Case Bank of China
14. Case ICBC
18. Case China Construction Bank
22. Case Agricultural Bank of China
30. static var interestrate: Double = 0.0668//Declare static property interest rate
38. static func Interestby (amount:double)-> Double {//define static method
42. Return InterestRate * Amount
46. }
50. }
58. Calling a static method
62. 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 an example of a class static method with the following code:

[HTML]View PlainCopyprint?

2. Class Account {
10. var owner: String = "Tony"//account name
14. Can be replaced by static
18. Class func Interestby (amount:double)-> Double {//using the keyword class to define a static method
22. Return 0.08886 * Amount
26. }
30. }
38. Calling a static method
42. Print (Account.interestby (10_000.00))//Call static method

swift-static Method-Standby