Access static variable from non static method in Swift

Question

I know that you cannot access a non static class variable from within a static context, but what about the other way around? I have the following code:

class MyClass {

    static var myArr = [String]()

    func getArr() -> [String] {
        return myArr
    }

However, when I try to compile this, I get the error MyClass does not have a member named myArr. I thought static variables were visible to both static and non static methods, so I don't know where I am going wrong.

I am on a Macbook running OS X Yosemite using Xcode 6.3.

I don't know the exact syntax for swift, but try something like return MyClass.myArr — Piepants
– Piepants, Commented Jul 1, 2015 at 17:39
@SvetlanaSlutstokyovich: Make that an answer to earn some swift(!) points – oops, too late :( — Martin R
– Martin R, Commented Jul 1, 2015 at 17:43

BurtK · Accepted Answer · 2016-10-18 18:14:53Z

6

In Swift3, dynamicType is deprecated. You can use type(of: )

struct SomeData {
  static let name = "TEST"
}

let data = SomeData()
let name = type(of:data).name
// it will print TEST

answered Oct 18, 2016 at 18:14

BurtK

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Comments

villy393 · Accepted Answer · 2015-07-01 17:43:02Z

5

You need to include the class name before the variable.

class MyClass {

    static var myArr = [String]()

    func getArr() -> [String] {
        return MyClass.myArr
    }
}

answered Jul 1, 2015 at 17:43

villy393

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1 Comment

Ian Bytchek Over a year ago

This will be a problem when myArr gets overwritten in a MyChildClass, getArr() will return value defined in MyClass, not in MyChildClass.

agy · Accepted Answer · 2015-07-01 18:25:39Z

2

You just need to add the class name.

class MyClass {

    static var myArr = [String]()

    func getArr() -> [String] {
        return MyClass.myArr
    }

}

You could access you Array from two different ways:

MyClass().getArr()

or

MyClass.myArr

answered Jul 1, 2015 at 18:25

agy

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2 Comments

Adrian M Over a year ago

Is using self.myArr an acceptable way to do this as well?

agy Over a year ago

Just from a class method and you don't need self explicitly

Myxtic · Accepted Answer · 2015-11-02 21:16:58Z

2

You can also use self.dynamicType:

class MyClass {

    static var myArr = [String]()

    func getArr() -> [String] {
        return self.dynamicType.myArr
    }
}

answered Nov 2, 2015 at 21:16

Myxtic

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