[UILabel copyWithZone:]: unrecognized selector sent to instance

I guess this was one of those weird bugs with Xcode that you can't trace or reproduce every time. I narrowed the issue down to one specific UILabel in the IB. As soon as I connect it to an IBOutlet UILabel *, I get this error.

On further investigation, it turns out that name title was causing the issue. I had the label declared as

IBOutlet UILabel *title;

As soon as I changed the name to gtitle, everything worked as expected. Who knows?..

Swift 5 in my Case

YOURBUTTON.addTarget(self, action: #selector(funCross), for: .touchUpInside)

//MARK:- My Function 
@objc func funWithSearch(screen: String)
{

}

if you focus on #selector(funCross) i am calling a function without object

when i use this its work fine

YOURBUTTON.addTarget(self, action: #selector(funTemp), for: .touchUpInside)

//MARK:- My Function 
@objc func funTemp()
{
    funWithSearch(screen: "etc your desire string")
}

//MARK:- My Function 
@objc func funWithSearch(screen: String)
{

}