ios - Dismissing UITableViewController changes ADBannerView location -

i have set adbannerview in last of uitableviewcontroller it's working when have same view, when go view , dismiss adview size changes.

here code

override func scrollviewdidscroll(scrollview: uiscrollview) {     let tablebounds = tableview.bounds     var bannerframe = self.bannerview.frame      bannerframe = cgrect(x: tablebounds.origin.x, y: tablebounds.origin.y + cgrectgetheight(tablebounds) - cgrectgetheight(bannerframe), width: tablebounds.size.width, height: bannerframe.size.height)     bannerview.frame = bannerframe } 

before

after

try replacing

let tablebounds = tableview.bounds 

with

let tablebounds = tableview.frame