ios - PSCollectionView's delegate not fire -

i followed pscollectionview's usage on github.

this code:

- (void)viewdidload {   self.collectionview = [[pscollectionview alloc] init];   self.collectionview.collectionviewdatasource = self;   self.collectionview.collectionviewdelegate = self;   self.collectionview.numcolsportrait = 2;    [self.view addsubview:self.collectionview];   [self.collectionview reloaddata]; // if don't call console empty. } - (nsinteger)numberofrowsincollectionview:(pscollectionview *)collectionview  {   nslog(@"num rows");   return 2; } - (pscollectionviewcell *)collectionview:(pscollectionview *)collectionview cellforrowatindex:(nsinteger)index {   nslog(@"cell row");   return nil; } - (cgfloat)collectionview:(pscollectionview *)collectionview heightforrowatindex:(nsinteger)index {   nslog(@"height row");   return 0.0; } 

my console empty. when called [collectionview reloaddata], here result:

num rows height row height row num rows 

i have no idea why "cell row" not printed out.

any hint or suggestion? thank you.

it's because have typo , it's not viewdidload() it's viewdidload(), viewdidload() never gets called. so, you're not able set delegate , datasource properly.