I am working on CS193P and I would like to create an effect where cards fly in from the 0,0 one after another snapping into place. I tried to chain the animation but the views flying together also I am trying to use UIDynamicAnimator and same thing happens. All the views are snapping together. Here is the code that i have to snap the views.
-(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;
[self.animator addBehavior:snapCard];
}
}
-(void)newGame
{
NSUInteger numberOfCardsInPlay = [self.game numberOfCardsInPlay];
for (int i=0; i<numberOfCardsInPlay; i++) {
PlayingCardView *playingCard = [[PlayingCardView alloc]initWithFrame:CGRectMake(0, 0, 50, 75)];
playingCard.faceUp = YES;
[playingCard addGestureRecognizer:[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(flipCard:)]];
[self.cards addObject:playingCard];
//NSUInteger cardViewIndex = [self.cards indexOfObject:playingCard];
//int cardColumn = (int) cardViewIndex / self.gameCardsGrid.rowCount;
//int cardRow = (int) cardViewIndex % self.gameCardsGrid.rowCount;
// playingCard.frame = [self.gameCardsGrid frameOfCellAtRow:cardRow inColumn:cardColumn];
playingCard.center = CGPointMake(0, 0);
[self.gameView addSubview:playingCard];
[self snapCardsForNewGame];
}
}
Does it even make sense to use it in this situation? I tried few different things to get the cards fly in one by one but wasn't able to.
Thanks in advance!
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];
});
}
}