I see a description of what UITableViewCellSeparatorStyleSingleLineEtched looks like in Apple’s Class Reference, and can see it by running the application. But I can’t find any mention of when it’s appropriate to use UITableViewCellSeparatorStyleSingleLineEtched instead of UITableViewCellSeparatorStyleSingleLine.
In other words, what does this etched line mean to the user? Can anyone explain?
The “why” part is because normal table cells have a white background and an etched look would not be appropriate, while the section heading cell has a gray background and adding a bit of highlight makes it pop out. At least, that’s my interpretation.