Implement NibLoadable

Implementing NibLoadable protocol and overriding a couple of functions will unleash the full power of referencing 💪

⌨️ - Code

To reference nibs only from code implement NibLoadable protocol:

class MyView: SomeBaseView, NibLoadable {
    // 'nibName' defaults to class name. "MyView" in this case.
    class var nibName: String { return "MyCustomView" }
}
let myView = MyView.fromNib()

💻 - IB

To reference nibs from interface builder (other nibs or storyboards) in addition to implementing NibLoadable override awakeAfter(using:) with a call to nibLoader - a helper struct from 'NibLoadable' protocol:

class MyView: SomeBaseView, NibLoadable {
    override func awakeAfter(using aDecoder: NSCoder) -> Any? {
        return nibLoader.awakeAfter(using: aDecoder, super.awakeAfter(using: aDecoder))
    }
}

⚡️📱✨ - @IBDesignable

To get real rendering and intrinsic content size from the nib - @IBDesignable attribute and some overrides are needed:

@IBDesignable
class MyView: SomeBaseView, NibLoadable {
    
    open override func awakeAfter(using aDecoder: NSCoder) -> Any? {
        return nibLoader.awakeAfter(using: aDecoder, super.awakeAfter(using: aDecoder))
    }
    
    #if TARGET_INTERFACE_BUILDER
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        nibLoader.initWithFrame()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }
    
    override func prepareForInterfaceBuilder() {
        super.prepareForInterfaceBuilder()
        nibLoader.prepareForInterfaceBuilder()
    }

    override func setValue(_ value: Any?, forKeyPath keyPath: String) {
        super.setValue(value, forKeyPath: keyPath)
        nibLoader.setValue(value, forKeyPath: keyPath)
    }
    
    #endif
}