Referencing another variable in a global variable in swift

Question

I don't understand why the following doesn't work in Swift:

class SomeClass {
    var foo = 1
    var bar = self.foo + 1
}

and what's the way around it?

hennes · Accepted Answer · 2015-08-13 17:07:18Z

1

It doesn't work because you cannot use self in that scope to define default values for properties. I believe it is due to the fact that you cannot use self before the object is properly initialized. You could use an explicit initializer instead.

class SomeClass {
    var foo: Int
    var bar: Int

    init() {
        self.foo = 1
        self.bar = self.foo + 1
    }
}

You can, however, access static members.

class SomeClass {
    static let initialValue = 1
    var foo = initialValue
    var bar = initialValue + 1
}

edited Aug 13, 2015 at 17:07

answered Aug 13, 2015 at 15:10

hennes

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1 Comment

Greg R Over a year ago

Got it, thanks for the explanation! Strange, but I get it.

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