UITableview单元格动画

Question

如果我逐行插入，则此动画从下到上动画工作。并在当时从上到下滚动时设置一个条件，而不是动画，但我也想在从下到上播放一次动画后停止动画。

willDisplayCell tableview方法：

if (tempIndex == nil)
{
    CGRect myRect = [tableView rectForRowAtIndexPath:indexPath];
    //instead of 568, choose the origin of your animation
    cell.frame = CGRectMake(cell.frame.origin.x,
                            cell.frame.origin.y + 568,
                            cell.frame.size.width,
                            cell.frame.size.height);
    [UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
        //instead of -30, choose how much you want the cell to get "under" the cell above
        cell.frame = CGRectMake(myRect.origin.x,
                                myRect.origin.y ,
                                myRect.size.width,
                                myRect.size.height);
    } completion:^(BOOL finished){
        [UIView animateWithDuration:0.3 animations:^{
            cell.frame = myRect;
        }];
    }];
    tempIndex = indexPath;
}
else if (tempIndex.row < indexPath.row)
{
    CGRect myRect = [tableView rectForRowAtIndexPath:indexPath];
    //instead of 568, choose the origin of your animation
    cell.frame = CGRectMake(cell.frame.origin.x,
                            cell.frame.origin.y + 568,
                            cell.frame.size.width,
                            cell.frame.size.height);
    [UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
        //instead of -30, choose how much you want the cell to get "under" the cell above
        cell.frame = CGRectMake(myRect.origin.x,
                                myRect.origin.y,
                                myRect.size.width,
                                myRect.size.height);
    } completion:^(BOOL finished){
        [UIView animateWithDuration:0.3 animations:^{
            cell.frame = myRect;
        }];
    }];
    tempIndex = indexPath;
}
else
{
    tempIndex = indexPath;
}

Answer 1

您可以维护一个整数，该整数是表视图动画之前的行的索引

//assuming animatedTill as a property initialized to 0 
    if (indexpath.row > self.animatedTill)
    {
        CGRect myRect = [tableView rectForRowAtIndexPath:indexPath];
        //instead of 568, choose the origin of your animation
        cell.frame = CGRectMake(cell.frame.origin.x,
                                cell.frame.origin.y + 568,
                                cell.frame.size.width,
                                cell.frame.size.height);
        [UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
            //instead of -30, choose how much you want the cell to get "under" the cell above
            cell.frame = CGRectMake(myRect.origin.x,
                                    myRect.origin.y ,
                                    myRect.size.width,
                                    myRect.size.height);
        } completion:^(BOOL finished){
            [UIView animateWithDuration:0.3 animations:^{
                cell.frame = myRect;
                self.animatedTill = indexpath.row
            }];
        }];
    }