ios - Why are my CGPoints all returning as {0,0}? -

i trying store locations of 10 uiimages have stored within uicollection , placed using interface builder. trying using view.center cgpoints returning {0,0} when logged.

another strange thing set break point on loop, 2 {0,0} values returning prior loop beginning.

code:

- (void)viewdidload {     dealerbtnorigins = [[nsmutablearray alloc] init];         nsvalue *point;         cgpoint cgpoint;         (int = 0; < 10; i++)         {             cgpoint = ((uiimageview *)[dealerbtns objectatindex:i]).center;             point = [nsvalue valuewithcgpoint:((uiimageview *)[dealerbtns objectatindex:i]).center];             nslog(@"%@", nsstringfromcgpoint(cgpoint));             nslog(@"%@", nsstringfromcgpoint(point.cgpointvalue));             [dealerbtnorigins addobject:point];         } } 

your collectionview hasn't rendered yet in viewdidload. place code in viewwillappear or viewdidappear after have created collectionview coors show.