NSTableView Animation Failure

Question

I have an NSTableView that periodically stops animating and updating itself correctly, which leads to a terrible user experience.

let oldRows = filteredDocuments let newRows = newFilteredDocuments let diff = oldRows.diff(newRows) filteredDocuments = newFilteredDocuments if (diff.results.count > 0) { let deletionIndexPaths = NSMutableIndexSet() diff.deletions.forEach { deletionIndexPaths.addIndex($0.idx) } let insertionIndexPaths = NSMutableIndexSet() diff.insertions.forEach { insertionIndexPaths.addIndex($0.idx) } self.tableView?.beginUpdates() self.tableView?.removeRowsAtIndexes(deletionIndexPaths, withAnimation: NSTableViewAnimationOptions.EffectFade) self.tableView?.insertRowsAtIndexes(insertionIndexPaths, withAnimation: NSTableViewAnimationOptions.SlideLeft) self.tableView?.endUpdates() } 

There seems to be no logic when he stops the animation, and in many of the tests that I have done, he almost feels as if it is related to the construction. Interestingly, it never stops animating when I profile ...

It is as if something in the main thread is clogging the user interface, and then NSTableView expires and cancels the update, but I have no idea how to debug this.

Answer 1

How about if you do one and then the other? I recently did something similar when I needed to insert a cell and scroll, which led to poor user experience. The solution was to add a little delay. Not sure if this is what you are trying to execute based on a small piece of code, but here we go:

 let oldRows = filteredDocuments let newRows = newFilteredDocuments let diff = oldRows.diff(newRows) filteredDocuments = newFilteredDocuments if (diff.results.count > 0) { let deletionIndexPaths = NSMutableIndexSet() diff.deletions.forEach { deletionIndexPaths.addIndex($0.idx) } let insertionIndexPaths = NSMutableIndexSet() diff.insertions.forEach { insertionIndexPaths.addIndex($0.idx) } self.tableView?.beginUpdates() self.tableView?.removeRowsAtIndexes(deletionIndexPaths, withAnimation: NSTableViewAnimationOptions.EffectFade) self.tableView?.endUpdates() let delay = 0.35 let time = dispatch_time(DISPATCH_TIME_NOW, Int64(delay * Double(NSEC_PER_SEC))) // Hate this syntax dispatch_after(delay, dispatch_get_main_queue(), { [weak self] in self?.tableView?.beginUpdates() self?.tableView?.insertRowsAtIndexes(insertionIndexPaths, withAnimation: NSTableViewAnimationOptions.SlideLeft) self?.tableView?.endUpdates() }) }