Swift：检查customview是否符合协议

Question

I have some custom views, that conforms to a protocol:

class CustomView1: UIView, MyProtocol {
    ...
}


class CustomView2: UIView, MyProtocol {
    ...
}

Then later, I want to check a view is my custom view or not by check if view conforms to my protocol, but it's not work:

let v = view.viewWithTag(1000)

if let _ = v as? MyProtocol {
    print("this is my custom view")
}

if v.self is MyProtocol.Type {
    print("this is my custom view")
}

Any ideas?

Thanks!

Answer 1

Everything fine in code, i think you are getting nil in let v = view.viewWithTag(1000)

I have checked your code in playground, it works fine.