Remove BackgroundView from UITargetedPreview in Swift

user_13731318 0
Viewed 656

I'm trying to remove the background view for my UITargetPreview. I made the background color clear, however, you can still see the frame of the background.

This is what it currently looks like:

I currently have a view that has the text container and the image inside of it and that's what I use as the view for the UITargetedPreview.

Is there a way to only show the image and the text and not the background frame?

swift xcode
4 Answers

There is a tricky method to hide the shadow and to do that you should find a view with _UIPlatterSoftShadowView class name in the view hierarchy and then hide it.

func viewByClassName(view: UIView, className: String) -> UIView? {
    let name = NSStringFromClass(type(of: view))
    if name == className {
        return view
    }
    else {
        for subview in view.subviews {
            if let view = viewByClassName(view: subview, className: className) {
                return view
            }
        }
    }
    return nil
}

override func tableView(_ tableView: UITableView, willDisplayContextMenu configuration: UIContextMenuConfiguration, animator: UIContextMenuInteractionAnimating?) {
    DispatchQueue.main.async {
        if let window = UIApplication.shared.delegate?.window! {
            if let view = self.viewByClassName(view: window, className: "_UIPlatterSoftShadowView") {
                view.isHidden = true
            }
        }
    }
}

NOTE: It's not documented internal class and can be changed anytime further but it works now on both ios 13/14.

user_9799860

Have you tried subclassing the UIView as a UIControl? I had a similar issue but in my case the view for UITargetedPreview was glitchy. However, changing the UIView to a UIControl fixed everything.

user_66042470

try removing shadow of that background view.

user_79897910

You need to study UIBezierPath() to outline the specific area you want to enclose before you present the target view.

After that, you shall assign the specific path to shadow path / visible path

let params = UIPreviewParameters()
        params.backgroundColor = .clear
        if #available(iOS 14.0, *) {
            params.shadowPath = bubblePath
        } else {
            params.visiblePath = bubblePath
        }
user_6834820
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