Ios 是否可以连续使用UISnapBehavior捕捉UIView

我正在CS193P上工作，我想创造一种效果，使卡片从0,0一张接一张地飞入到位。我试图链接动画，但视图飞在一起，我也试图使用UIDynamicMator，同样的事情也发生了。所有视图都在对齐。下面是我必须捕捉视图的代码

-(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];
    }
}

-（无效）SnapCardsFornewName
{
用于（在self.cards中播放cardView*cardView）{
NSU Integer 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 CenterOfcellarRow:cardRow inColumn:cardColumn]]；
snapCard.damping=1.0；
[self.animator addBehavior:snapCard]；
}
}
-（无效）新游戏
{
NSUInteger numberOfCardsInPlay=[self.game numberOfCardsInPlay]；
对于（int i=0；i由于您同时添加所有的
UISnapBehaviors
，动画制作者会将它们一起运行。延迟将它们添加到动画制作者中，它们将自行设置动画

-(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];
        });
    }
}

我以前没有使用过这个，但是UIDynamicMator有一个代理，你可以将自己设置为。当动态设置达到平衡时，动画师（我想）暂停并告诉学员它暂停了。这样您就不会在这里写循环了。您抓拍一张卡，等待暂停，再抓拍一张…效果很好。我只是将延迟时间更改为0.05，使卡的输出速度稍微慢一点。谢谢！太棒了！快乐编码：）