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Hemant Garg
Hemant Garg

Reputation: 36

Change value of enum's variable as per the latest in swift

am new to swift PL. I have doubt regarding a new implementation. Your help would be appreciated. Thanks.

Desc : I have an enum in a class with multiple API URLs. Those API URL are accessing a variable - BaseURL declared in that same class. I want to change value of that BaseURL from another class but enum variables are fetching the same old value.

class : API.swift

var BaseURL = "xyz.com/"

enum apis {
  static let login = BaseURL + "login"
}

class : ViewControllerA.swift

func switchBaseURL() {
  BaseURL = "abc.com/"

  // Call API Method
  self.callAPI()
}

func callAPI(){
  print("\(apis.login)") // Result is : xyz.com/login
}

I want to implement a solution that would enable to switch the value of BaseURL anytime from any class such that enum fetches the latest value set in BaseURL everytime.

Upvotes: 0

Views: 864

Answers (1)

lazarevzubov
lazarevzubov

Reputation: 2285

The problem here is that login is declared static. It means that it's only computed once. Not to mention, it's also let.

One of the things that you can do without drastically changing your design is to modify the login property to be computed every time it's accessed:

var baseURL = "xyz.com/"

enum API {
    static var login: String { baseURL + "login" }
}

print(API.login) // xyz.com/login

baseURL = "abc.com/"
print(API.login) // abc.com/login

The code adopted to the original snippet:

var baseURL = "xyz.com/"

enum API {
    static var login: String { baseURL + "login" }
}

func switchBaseURL() {
    baseURL = "abc.com/"
    callAPI()
}

func callAPI(){
    print("\(API.login)")
}

switchBaseURL() // Prints abc.com/login

Upvotes: 2

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