ios - UIImageViews not scaling correctly in UIScrollView with paging -

i'm trying build simple uiscrollview several images paging enabled.

however, can't seen images correctly resized bounds of uiscrollview. images bigger bounds, messing paging.

i have uiscollview , uipagecontrol in interface builder , link in viewcontroller swift file.

here viewdidload method (pageimages defined var pageimages: [uiimage] = [] , pageviews var pageviews: [uiimageview?] = []:

override func viewdidload() {     scrollview.delegate = self     scrollview.pagingenabled = true     scrollview.scrollenabled = true     scrollview.showshorizontalscrollindicator = false     scrollview.showsverticalscrollindicator = false     scrollview.bounces = true     scrollview.scrollstotop = false      pageimages = [uiimage(named: "image1")!,         uiimage(named: "image2")!,         uiimage(named: "image3")!,         uiimage(named: "image4")!,         uiimage(named: "image5")!]      let pagecount = pageimages.count      pagecontrol.currentpage = 0     pagecontrol.numberofpages = pagecount      (var i=0; i<pagecount; i++) {         var xorigin: cgfloat = cgfloat(i) * scrollview.bounds.size.width          let imageview: uiimageview = uiimageview(frame: cgrectmake(xorigin, 0, scrollview.bounds.size.width, scrollview.bounds.size.height))         imageview.image = pageimages[i]         imageview.contentmode = uiviewcontentmode.scaleaspectfill         imageview.clipstobounds = true         scrollview.addsubview(imageview)     }       let pagesscrollviewsize = scrollview.frame.size     scrollview.contentsize = cgsize(width: pagesscrollviewsize.width * cgfloat(pageimages.count),         height: pagesscrollviewsize.height) } 

my scrollviewdidscroll method follows:

func scrollviewdidscroll(scrollview: uiscrollview) {     let pagewidth = self.scrollview.frame.size.width     let page = int(floor((self.scrollview.contentoffset.x - pagewidth/2)/pagewidth) + 1)     self.pagecontrol.currentpage = page } 

can spot mistake? have set contentmode maybe in viewwillappear or viewdidappear?

try setting imageviews sizes under:

• (void)viewdidlayoutsubviews

at point, autolayout had finished resizing views/subviews according layout system defined on interface builder if calculations correct (according requirements) should work out fine.