Unable to access UIView subclass IBOutlets From TabBarController - swift

Question

I have a UIView Class with xib. I try to add it in another ViewControllers as a popover view. I have outlet connections. But when I run the application it crashed and stated
This class is not key value coding-compliant for the key btnAbtUs
I think the problem is should select delegate. I may using wrong way to add this xib. How can I correct it?
Here is my code.
my UIView subclass
class MoreView: UIView {
#IBOutlet var containerView: UIView!
#IBOutlet weak var btnAboutUs: UIButton!
override public func awakeFromNib() {
super.awakeFromNib()
}
override init(frame: CGRect) {
super.init(frame: frame)
loadViewFromNib()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
loadViewFromNib()
}
func loadViewFromNib() {
let bundle = Bundle(for: type(of: self))
let nib = UINib(nibName: "MoreView", bundle: bundle)
let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView
view.frame = bounds
view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
self.insertSubview(view, at: 0)
commitInit()
}
private func commitInit(){
containerView.translatesAutoresizingMaskIntoConstraints = true
self.btnAboutUs.addTarget(self, action: #selector(self.clickAboutUs(_:)), for: .touchUpInside)
}
class func instanceFromNib() -> UIView {
return UINib(nibName: "MoreView", bundle: nil).instantiate(withOwner: nil, options: nil)[0] as! UIView
}
#objc func clickAboutUs(_ sender: Any) {
print("tap")
}
}
in UITabBarController
func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool {
let moreView = MoreView.instanceFromNib
if let navigationController = viewController as? UINavigationController,
navigationController.viewControllers.contains(where: { $0 is MoreViewController }) {
moreView().frame.origin.y = 100
self.view.addSubview(moreView())
return false
} else {
moreView().removeFromSuperview()
return true
}
}

Answer 1

Finally I found the issue. This is the right way to add a UIView as a SubView controller of a UIViewController.
func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool {
if let navigationController = viewController as? UINavigationController,
navigationController.viewControllers.contains(where: { $0 is MoreViewController }) {
let mySubView : MoreView
mySubView = MoreView(frame: CGRect(x: 0, y: 0, width: 375, height: 667) )
self.view.addSubview(mySubView)
return false
} else {
return true
}
}

Answer 2

You might have copied the XIB and forgot to remove/add a connection with the IBOutlet. Please check.
It indicates that an already connected Interface Builder object is removed/renamed in its owner's source (File's Owner).

Answer 3

You may forgot to remove a connection with the IBOutlet. Please check on on show connection inspector.First click on file inspector of xib then click on show connection inspector. Shown in image.
Remove the broken outlets.