Evernote Tips App Image Overlay UITableView

The Evernote app has a tooltip bar that hangs above the UITableView in the start window. When you click on the hints, a straight-line animation occurs as the hints bar slides up.

My question is how is this tooltip bar implemented in the sense that you absolutely have to click on the tab to bring it to life. Any pixel to the left of it will actually end up in the UITableViewCell. Is this a Core Graphics / Quartz trick or just transparent? It is difficult to articulate what I am trying to ask here, but I hope someone will understand.

Here is a screenshot of the hint bar at the bottom of the main screen of the Evernote app: http://dl-client.getdropbox.com/u/57676/evernote.jpg

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Probably using a transparent image and overrides -hitTest:withEvent:

to declare the transparent parts of the image as not being part of the view.



Another possibility is two views, one for the tab and one for the rest of the panel, but this seems to work to keep everything in sync.

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