“Unrecognized selector sent to instance” in swift

Question

I have no idea what I am doing wrong. I am also quite new to programming so I am not very good at debugging. This was a test app so that I can see how swift ties in with app

Answer 1

when using performSelector() methods your method (matching the selector) should be marked as @objc

{  
    //...
    performSelector(Selector("myMethod"), withObject: nil, afterDelay: 0.3)
    //...

    // or in swift 2.2
    performSelector(#selector(ClassName.myMethod), withObject: nil, afterDelay: 0.3)
    //

    // or in swift 3
    perform(#selector(ClassName.myMethod), with: nil, afterDelay: 0.3)
    //

}

@objc private func myMethod() { }