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Though I cannot find any documentation, it seems that UIPasteboard cannot be used from a Quick Look Preview app extension. I have such an extension, which contains a view that supports copying text as follows: - (IBAction)copy:(nullable id)sender { UIPasteboard * pboard = UIPasteboard.generalPasteboard; pboard.string = _rep.text; } This is invoked from a context menu (edit menu) item. This works fine In the simulator, but on device the pasteboard remains empty and errors like the following are emitted: -[PBServerConnection pasteboardWithName:createIfNeeded:authenticationBlock:dataOwnerBlock:error:] failed with error: Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.apple.pasteboard.pasted was invalidated: failed at lookup with error 159 - Sandbox restriction." UserInfo={NSDebugDescription=The connection to service named com.apple.pasteboard.pasted was invalidated: failed at lookup with error 159 - Sandbox restriction.} It's unclear to me why such functionality would be problematic and necessary to block. It would be nice if this were documented clearly, as I wasted a lot of time trying to figure out why this was not working. (And no, I have not filed a feedback report or TSI yet, as I'm presently very short on time, and I don't have a sample project prepared to demonstrate the issue.)

Hi, I'm interested in creating a font with alternate glyphs that are accessed via Unicode variation selectors, but I'm getting the impression that macOS does not really support these, generally. For example, I'm unable to enter the variation selectors (other than U+FE0F) into a document in Pages or TextEdit using Unicode Hex Input. Is my hunch correct? I'm interested in using the standardized variations listed here: http://unicode.org/Public/UNIDATA/StandardizedVariants.txt Specifically, slashed zero: 0030 FE00; short diagonal stroke form; # DIGIT ZERO Thanks for any insight you may be able to provide.