return new ViewController in Swift

Question

this is a follow up question to this : Assign ViewController to Class or vice versa

So i have a ViewController called SwipeStepViewController, it subclasses from ORKActiveStepViewController. In the SwipeStep class i try to override the default ViewController with my custom SwipeStepViewController.

I tried to override the +stepViewControllerClass method and return my Custom Viewcontroller inside the SwipeStep class: import ResearchKit

class SwipeStep:ORKActiveStep{

    override func stepViewControllerClass(){
        return SwipeStepViewController.self
    }

}

but this does not work at all. I use researchkit, but i guess it is a general swift question.

Answer 1

I don't have any experience with ResearchKit, but after taking a look at the Objective-C code I believe your method should be:

override class func stepViewControllerClass() -> AnyClass {
    return SwipeStepViewController.self
}

To explain why you're getting the errors:

Method does not override any method from its superclass.

and

'SwipeStepViewController.Type' is not convertible to '()'

take a look at the class method (indicated by the +) you're supposedly overriding:

+ (Class)stepViewControllerClass {
    return [ORKFormStepViewController class];
}

Compare this with your method:

override func stepViewControllerClass(){
    return SwipeStepViewController.self
}

which is neither a class method, nor returns a class and it's clear where the errors are coming from.