Why is NSImage not showing in NSImageView?

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Created Sep ’18

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I have created a document-based project with a storyboard containing an NSScrollView, where I changed the class of the NSClipView's child to NSImageView. As part of the debugging, I have added to the NSImageView a couple of NSButtons with some standard NSImage icons.

The NSImage is being created from a *.png file using a trivial "override func read(from url: URL, ofType typeName: String)" in the Document.swift. I know the image is being created properly, since it will display in the NSButtons when I set their .image var. However, neither my image, nor the button icon images will display in the NSImageView within the scroll view.

I know the scroll view is functioning, since I can pinch & zoom, and the buttons will move and resize as expected.

I thought that an app that read and displayed an image in a scroll view would be trivial to write. Once again, reality is nastier than my imagination.

Thanks,

Richard

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Answer 1

GnerphSoft OP

Sep ’18

OK, I've answered my own question.

The right thing to do is to add an NSImageView to a storyboard and THEN to embed it in a NSScrollView.

The wrong thing to do is to add an NSScrollView to a storyboard and to change the class of the NSClipView's child to NSImageView.

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Answer 2

Claude31 OP

Sep ’18

Great you found the solution.

Please mark your own answer as correct.

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