ios – UITableView以编程方式调用滑动操作

我有一个UITableView,用户可以向左滑动以显示动作(如iOS 8邮件).这一切都按预期工作.当用户点击单元格的某个部分时,我想触发这个.如何以编程方式调用此幻灯片动作？

当前行为：用户必须向左滑动单元才能公开操作按钮.

所需行为：用户在单元格上点击(操作按钮).单元格滑过以公开操作按钮.

解决方法

那么我找不到一个方法来编程,但是我想出了这个解决方法.当用户点击单元格时,我将鼠标左键动画(平移),立即显示“滑动我”按钮.这很快就颠倒了,所以细胞恢复正常.这提供了一个视觉提示,让用户知道他们可以滑动单元格：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];

    __block UILabel *swipeLabel = [[UILabel alloc]initWithFrame:CGRectMake(cell.bounds.size.width,200,cell.bounds.size.height)];

    swipeLabel.text = @"  Swipe Me";
    swipeLabel.backgroundColor = [UIColor greenColor];
    swipeLabel.textColor = [UIColor whiteColor];
    [cell addSubview:swipeLabel];

    [UIView animateWithDuration:0.3 animations:^{
        [cell setFrame:CGRectMake(cell.frame.origin.x - 100,cell.frame.origin.y,cell.bounds.size.width,cell.bounds.size.height)];
    } completion:^(BOOL finished) {
        [UIView animateWithDuration:0.3 animations:^{
            [cell setFrame:CGRectMake(cell.frame.origin.x + 100,cell.bounds.size.height)];
        } completion:^(BOOL finished) {
            [swipeLabel removeFromSuperview];
            swipeLabel = nil;
        }];
    }];
}

希望这有助于某人.

请注意,您需要将tableViewCell的选择类型设置为none.否则灰色的酒吧会掩盖它.

更新.我以为我会发布更多Swifty版本：

func previewActions(forCellAt indexPath: IndexPath) {
    guard let cell = tableView.cellForRow(at: indexPath) else {
        return
    }

    let label: UILabel = {
        let label = UILabel(frame: CGRect.zero)
        label.text = "  Swipe Me  "
        label.backgroundColor = .blue
        label.textColor = .white
        return label
    }()

    // figure out the best width and update label.frame
    let bestSize = label.sizeThatFits(label.frame.size)
    label.frame = CGRect(x: cell.bounds.width - bestSize.width,y: 0,width: bestSize.width,height: cell.bounds.height)
    cell.insertSubview(label,belowSubview: cell.contentView)

    UIView.animate(withDuration: 0.3,animations: {
        cell.transform = CGAffineTransform.identity.translatedBy(x: -label.bounds.width,y: 0)
        label.transform = CGAffineTransform.identity.translatedBy(x: label.bounds.width,y: 0)
    }) { (finished) in
        UIView.animateKeyframes(withDuration: 0.3,delay: 0.25,options: [],animations: {
            cell.transform = CGAffineTransform.identity
            label.transform = CGAffineTransform.identity
        },completion: { (finished) in
            label.removeFromSuperview()
        })
    }
}

func tableView(_ tableView: UITableView,didSelectRowAt indexPath: IndexPath) {
    previewActions(forCellAt: indexPath)
    return
}