I have a custom QLPreviewController created to preview and edit the images in my app. I need to identify when the QLPreviewController enters markup mode, and based on that I have to show/hide some buttons on the navigation bar. But I cant find any way to identify this transition. The button action and UI changes are happening inside QLPreviewController and there is no delegate methods exposed by apple for this.
Another thing I tried was to check if pencil kit is added on the view.subViews. But it is presented in some other way, so that we cant find it in subviews.
Please help me find a solution for this.