Question

正如我的标题所示，当用户访问UITableView时，我想从左向右滑动第一行ViewController。

在我的ViewController我有一个UITableView，每行有两个按钮“更多”和“删除”操作。请看下面的代码

func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
    return true
}

func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
    if (editingStyle == UITableViewCellEditingStyle.delete) {
    }
}


func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
    let deleteButton = UITableViewRowAction(style: .normal, title: "Delete") { action, index in
        // Edit Button Action
    }
    deleteButton.backgroundColor = UIColor.red

    let editButton = UITableViewRowAction(style: .normal, title: "Edit") { action, index in
        // Delete Button Action
    }
    editButton.backgroundColor = UIColor.lightGray

    return [deleteButton, editButton]
}

一切都很好。但是我希望当最终用户第一次使用此ViewController时，他们会通知可以执行滑动操作，以便他们执行此操作。

问题是：如何在第一行自动向左和向右滑动？

我做了什么？

 override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    let cell = posTblView.cellForRow(at: NSIndexPath(row: 0, section: 0) as IndexPath) as! POSUserTabelCell
    UIView.animate(withDuration: 0.3, animations: {
        cell.transform = CGAffineTransform.identity.translatedBy(x: -150, y: 0)
    }) { (finished) in
        UIView.animateKeyframes(withDuration: 0.3, delay: 0.25, options: [], animations: {
            cell.transform = CGAffineTransform.identity
        }, completion: { (finished) in
        })
    }
}

通过上面的代码滑动/移动单元工作但不显示“删除”和“更多”按钮。

所以请指导我正确的方向。

Answer 1

我找到了一种方法来实现它。

Semaphore

在单元格的末尾添加自定义override func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) if arrStudent.count > 0 { let indexPath = NSIndexPath(row: 0, section: 0) let cell = tblStudent.cellForRow(at: indexPath as IndexPath); let swipeView = UIView() swipeView.frame = CGRect(x: cell!.bounds.size.width, y: 0, width: 170, height: cell!.bounds.size.height) swipeView.backgroundColor = .clear let swipeEditLabel: UILabel = UILabel.init(frame: CGRect(x: 0, y: 0, width: 80, height: cell!.bounds.size.height)) swipeEditLabel.text = "Edit"; swipeEditLabel.textAlignment = .center swipeEditLabel.font = UIFont.systemFont(ofSize: 19) swipeEditLabel.backgroundColor = UIColor(red: 180/255, green: 180/255, blue: 180/255, alpha: 1) // Light Gray: Change color as you want swipeEditLabel.textColor = UIColor.white swipeView.addSubview(swipeEditLabel) let swipeDeleteLabel: UILabel = UILabel.init(frame: CGRect(x: swipeEditLabel.frame.size.width, y: 0, width: 90, height: cell!.bounds.size.height)) swipeDeleteLabel.text = "Delete"; swipeDeleteLabel.textAlignment = .center swipeDeleteLabel.font = UIFont.systemFont(ofSize: 19) swipeDeleteLabel.backgroundColor = UIColor(red: 255/255, green: 41/255, blue: 53/255, alpha: 1) // Red color: Change color as you want swipeDeleteLabel.textColor = UIColor.white swipeView.addSubview(swipeDeleteLabel) cell!.addSubview(swipeView) UIView.animate(withDuration: 0.60, animations: { cell!.frame = CGRect(x: cell!.frame.origin.x - 170, y: cell!.frame.origin.y, width: cell!.bounds.size.width + 170, height: cell!.bounds.size.height) }) { (finished) in UIView.animate(withDuration: 0.60, animations: { cell!.frame = CGRect(x: cell!.frame.origin.x + 170, y: cell!.frame.origin.y, width: cell!.bounds.size.width - 170, height: cell!.bounds.size.height) }, completion: { (finished) in for subview in swipeView.subviews { subview.removeFromSuperview() } swipeView.removeFromSuperview() }) } } }，并在完成动画后将其删除。

您可以根据需要设置自定义视图的框架
根据需要添加带背景颜色和标题的标签。

在这里你应该编写代码，而不是每次在UIView中调用此代码时，只应调用一次用户指示。

Answer 2

向左转换单元格不会使操作按钮可见。

您需要通过调用单元格上的entities方法将该单元格发送到编辑模式，并将其放入setEditing：

viewDidAppear

无需触摸即可轻扫UITableViewCell

2 个答案: