ios - Unexpected Header View in UITableView's section using NSFetchedResultsController -


enter image description here

it easy see, lightblue uitableviewheaderfooterview, , white 1 uitableviewcell. use nsfetchedresultscontroller load sections , groups coredata. every blue header new section.

sometimes (not always) there header view instead of table view cell. why?

in viewdidload register header view:

tableview.registernib(uinib(nibname: "pbouserworkdayheaderview", bundle: nil), forheaderfooterviewreuseidentifier: pbouserworkdayheaderviewidentifier)

what more interesting, when debug view hierarchy can see, there custom cell, covered header. why?

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is ios bug? think? sth wrong rendering or way of thinking?

since problem headers, created custom method remove unnecessary headers every time when tableview ask `viewforheaderinsection:.

assuming know how distinguish headers other views (in case have custom class) , know header views direct subviews of tableview can remove them in following way:

private func removedoubledheaders() {     let subviews = tableview.subviews.reverse()      var dates = [string]()     view in subviews {         if let header = view as? pbouserworkdayheaderview {             if let date = header.datelabel.text {                 if contains(dates, date) {                     view.removefromsuperview()                 } else {                     dates.append(date)                 }             }         }     } }

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