Question

我正在尝试将动画放在UITableViewCell的底部到顶部，为此工作的代码很好：

-(void)tableView:(UITableView *)tableView willDisplayCell:(audioVcCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{


cell.alpha =0.0;

    UIView *cellContentView = [cell contentView];
    CGFloat rotationAngleDegrees = -30;
    CGFloat rotationAngleRadians = rotationAngleDegrees * (M_PI/180);
    CGPoint offsetPositioning = CGPointMake(0, cell.contentView.frame.size.height*4);
    CATransform3D transform = CATransform3DIdentity;
    transform = CATransform3DRotate(transform, rotationAngleRadians, -50.0, 0.0, 1.0);
    transform = CATransform3DTranslate(transform, offsetPositioning.x, offsetPositioning.y, -50.0);
    cellContentView.layer.transform = transform;
    cellContentView.layer.opacity = 0.8;

    [UIView animateWithDuration:3.0 delay:indexPath.row+3 usingSpringWithDamping:0.85 initialSpringVelocity:0.8 options:UIViewAnimationOptionCurveEaseInOut animations:^{
        cellContentView.layer.transform = CATransform3DIdentity;
        cellContentView.layer.opacity = 1;
        cell.alpha=1.0;

    } completion:^(BOOL finished) {

    }];

}

这里我想逐个显示每个单元格，间隔为2或3秒。目前Cell将快速显示。提前谢谢。

Answer 1

我通过@PhaniRaghu提出的想法解决了这个问题我对他的答案做了一些修改并且工作正常。

dispatch_after(dispatch_time(DISPATCH_TIME_NOW, indexPath.row * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
    [UIView animateWithDuration:3.0 
            delay:indexPath.row 
            usingSpringWithDamping:0.85 
            initialSpringVelocity:0.8 
            options:UIViewAnimationOptionCurveEaseInOut 
            animations:^{
                cellContentView.layer.transform = CATransform3DIdentity;
                cellContentView.layer.opacity = 1;
                cell.alpha=1.0;
    } completion:^(BOOL finished) {
    }];
});

特定时间后UITableView WillDisplayCell方法调用？

1 个答案: