Since you're adding all the UISnapBehaviors
at the same time, the animator runs them all together. Delay adding them to the animator and they'll be animated on their own.
-(void)snapCardsForNewGame
{
for (PlayingCardView *cardView in self.cards){
NSUInteger cardViewIndex = [self.cards indexOfObject:cardView];
int cardColumn = (int) cardViewIndex / self.gameCardsGrid.rowCount;
int cardRow = (int) cardViewIndex % self.gameCardsGrid.rowCount;
UISnapBehavior *snapCard = [[UISnapBehavior alloc]initWithItem:cardView snapToPoint:[self.gameCardsGrid centerOfCellAtRow:cardRow inColumn:cardColumn]];
snapCard.damping = 1.0;
NSTimeInterval delayTime = 0.01 * cardViewIndex;
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayTime * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[self.animator addBehavior:snapCard];
});
}
}