ios - Allow UIScrollView to Scroll Past Content Without Bouncing -



ios - Allow UIScrollView to Scroll Past Content Without Bouncing -

overview

i'm building app allows user overscroll main uicollectionview amount in order load related content. tactile experience of overscroll should same many other ios apps cause content on current page refresh, set collectionview.bounce = yes.

once user overscrolls designated amount, want move current uicollectionview downwards , out of view, while simultaneously moving new page downwards view top of device, similar inter-article navigation in digg iphone app.

i'm detecting overscroll using uiscrollviewdelegate method:

-(void)scrollviewdidenddragging:(uiscrollview *)scrollview willdecelerate:(bool)decelerate { cgfloat offsety = scrollview.contentoffset.y; cgfloat contentheight = scrollview.contentsize.height; if (offsety < -40){ [self.delegate overscrolledup]; } if (offsety - (contentheight - scrollview.frame.size.height) > 40){ [self.delegate overscrolleddown]; } } problem

the delegate takes care of moving frames of these uicollectionviews, problem current page moving downwards , out of view (or , out of view if user overscrolls down), uicollectionview bouncing scroll contentoffset of (0,0). results in unusual looking animation i'd avoid. want user able overscroll indicator shown describing new content can see, don't want overscroll reversed during page-changing animation.

question

is there way prevent uicollectionview/uiscrollview returning scroll (0,0) after user scrolls past content?

take at

https://github.com/enormego/egotableviewpullrefresh

it contains pull refresh tableview code, can utilize straight or source of inspiration.

ios uiscrollview uicollectionview overscroll

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