CODEWITHSUNDEEP
swiftoption-type
newme
newme

Reputation: 577

XXXX!.Type does not have a memeber YYYY

class SomeClass {
    class var category: Int {
        return 1class SomeClass {
    class var category: Int {
        return 1
    }
}

class AnotherClass {
    var someClass: SomeClass!

    init() {
        someClass = SomeClass()
    }
}

var a = AnotherClass()
println("\(a.someClass.dynamicType.category)")   // error: SomeClass!.Type does not have a member named category
println("\(SomeClass.category)")  // print 1

of course I can use SomeClass.category, here is just an example to show the problem. when I don't know the exact type of a.someClass, inheritance for example, how can I do it?

Upvotes: 0

Views: 87

Answers (1)

rintaro
rintaro

Reputation: 51911

You can:

println("\(a.someClass!.dynamicType.category)")

Unlike normal member access, .dynamicType does not implicitly unwrap the ImplicitlyUnwrappedOptional

In your case, a.someClass is ImplicitlyUnwrappedOptional<SomeClass>, and ImplicitlyUnwrappedOptional<T> has no .category static member.

So, you have to manually unwrap it with a.someClass!

Upvotes: 2

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