ios - rectForRowAtIndexPath crashing with defined indexPath in UITableView -

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the following code crashing @

currentcellrect = tableview.rectforrowatindexpath(indexpaths[0])

but sometimes.

public func showcellscrollcount(animated:bool) {     self.tableview.addobserver(self, forkeypath: "contentoffset", options: nskeyvalueobservingoptions.new, context: nil)     self.tableview.addobserver(self, forkeypath: "dragging", options: nskeyvalueobservingoptions.new, context: nil) }  override public func observevalueforkeypath(keypath: string?, ofobject object: anyobject?, change: [string : anyobject]?, context: unsafemutablepointer<void>) {     switch (keypath, object) {      case (.some("contentoffset"), _):         self.updatescrollposition()     default:         super.observevalueforkeypath(keypath, ofobject: object, change: change, context: context)     } }  func updatescrollposition() {      let indexpaths = tableview.indexpathsforvisiblerows     var currentcellrect:cgrect?     if let indexpaths = indexpaths {         if indexpaths.count > 0 {             currentcellrect = tableview.rectforrowatindexpath(indexpaths[0])             scrollcountview.currentscrollcountnum = indexpaths[0].row         }     } }

it crashes "bad_access". have idea why?

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...

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edit: possible it's happening because i'm calling tableview.reloaddata() right before add observers, , call isn't finished yet?

updated

your code works fine since added tableview controller , called showcellscrollcount func once. call showcellscrollcount, call multiple times? can problem if so.

update 3

here problem:

public var totalscrollcountnum = 0 {     didset {         scrollcountview.totalscrollcountnum = totalscrollcountnum         showcellscrollcount(false)     } }

move showcellscrollcount(false) initializers


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