Use @IBInspectable with any UIView subclass within storyboards

Question

I have a class to use with @IBInspectable, to get the properties within my storyboard. Here is a small chunk of it:

/// UIView subclass to allow creating corners, shadows, and borders in storyboards.
final class GEView: UIView {

    // MARK: - Rounded corners
    @IBInspectable
    var cornerRadius: CGFloat = 0 {
        didSet {
            layer.cornerRadius = self.cornerRadius
            layer.masksToBounds = true
        }
    }

    /* ... */
}

This works completely fine within UIViews in my storyboard. However, I want this to also work with UIImageViews and other subclasses of UIView. Is this possible without subclassing my GEView, by somehow making this a generic?

Answer 1

Move your code to UIView's @IBDesignable extension like below:

@IBDesignable extension UIView {    
    @IBInspectable var cornerRadius: CGFloat {
        set {
            layer.cornerRadius = newValue
            layer.masksToBounds = true
        }
        get {
            return self.cornerRadius
        }
    }
}

Clear unwanted values/types of previously deifned vars in your GEView. Here are values in inspector.

Properties available in inspector of any UIView, included itself.