无需触摸即可轻扫UITableViewCell [英] Swipe UITableViewCell without touch

问题描述

正如我的标题所说，我想从左到右滑动第一行 UITableView 当用户来到 ViewController 。

As my title saying I want to swipe first row of UITableView left to right when user will come on that ViewController.

在我的 ViewController 我有一个 UITableView ，每行有两个按钮更多和删除动作。看下面的代码

In my ViewController I have one UITableView, each row have two button "More" and "Delete" action. Look at below code

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来到这个 ViewController 时，他们会通知可以进行滑动操作，以便他们执行它。

All is working good. But I want when end-user comes on this ViewController at first time so they will notify that there is swipe action available so they will perform it.

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/移动单元格正在工作，但没有显示删除和更多按钮。

By above code swipe/moving cell is working but not display "Delete" and "More" button.

所以请指导我正确的方向。

So please guide me on right direction.

推荐答案

我找到了一种方法来实现它。

I found one way to achieve it.

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()
            })

        }
    }
}

添加自定义 UIView 在单元格的末尾并在动画完成后将其删除。

Add custom UIView at end of cell and remove it after animation is done.

• 您可以根据需要设置自定义视图的框架


• 根据需要添加带有背景颜色和标题的标签。

这里你应该不是每次都写代码在 viewDidAppear 中调用此代码，只应调用一次，仅用户指示。

Here you should write code for not every time call this code in viewDidAppear it should be call once for only user indication.

这篇关于无需触摸即可轻扫UITableViewCell的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！