Question

我创建了一个任务表视图，我希望用户能够在作业完成时向右滑动，然后在作业不完整时再次向右滑动。

在单元格的左侧，我有一个用UIView创建的框，表示单元格是否完整。

当用户每次向右滑动时，我希望能够在绿色（完整）和红色（不完整）之间切换框的颜色。

我不知道实现这个目标的最佳方法？我在stackOverflow中搜索了答案，但看不到任何问题的解决方案。任何帮助将不胜感激！

谢谢。

我的视图控制器：

class ViewController: UITableViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        navigationItem.title = "Tasks"
        tableView.allowsMultipleSelectionDuringEditing = true
        tableView.register(jobCell.self, forCellReuseIdentifier: cellId)        
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return text.count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        let cell =  tableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath)
        cell.accessoryType = UITableViewCellAccessoryType.disclosureIndicator

        let task = text[indexPath.row]
        let detailTask = detailText[indexPath.row]

        cell.textLabel?.text = task
        cell.detailTextLabel?.text = detailTask

        return cell
    }

    override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 100
    }

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

    override func tableView(_ tableView: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
        if jobComplete == ["true"] {
            let jobUncompleteAction = UIContextualAction(style: .normal, title: "Uncomplete", handler: { (ac:UIContextualAction, view:UIView, success:(Bool) -> Void) in
                print("Job Complete")
                success(true)
            })

            //jobComplete = false
            jobUncompleteAction.backgroundColor = UIColor(red:0.80, green:0.00, blue:0.00, alpha:1.0)
            return UISwipeActionsConfiguration(actions: [jobUncompleteAction])
        } else {
            let jobCompleteAction = UIContextualAction(style: .normal, title: "Complete", handler: { (ac:UIContextualAction, view:UIView, success:(Bool) -> Void) in
                print("Job Complete")
                success(true)
            })
            //jobComplete = true
            jobCompleteAction.backgroundColor = UIColor(red:0.00, green:0.61, blue:0.02, alpha:1.0)
            return UISwipeActionsConfiguration(actions: [jobCompleteAction])
        }
    }

}

我的tableViewCell：

    class jobCell: UITableViewCell {

    override func layoutSubviews() {
        super.layoutSubviews()

        self.textLabel?.frame.origin.x = 20
        self.detailTextLabel?.frame.origin.x = 20
    }

    let jobCompleteBar: UIView = {
        let jobCompleteBar = UIView()
        jobCompleteBar.backgroundColor = UIColor(red:0.80, green:0.00, blue:0.00, alpha:1.0)
        jobCompleteBar.translatesAutoresizingMaskIntoConstraints = false
        return jobCompleteBar
    }()

    override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: .subtitle, reuseIdentifier: reuseIdentifier)

        addSubview(jobCompleteBar)

        jobCompleteBar.leftAnchor.constraint(equalTo: leftAnchor, constant: 0).isActive = true
        jobCompleteBar.centerYAnchor.constraint(equalTo: self.centerYAnchor).isActive = true
        jobCompleteBar.widthAnchor.constraint(equalToConstant: 3).isActive = true
        jobCompleteBar.heightAnchor.constraint(equalToConstant: 100).isActive = true        
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

Answer 1

首先在cellForRow函数中转换你的单元格：

<style></style>

在jobCell中声明一个变量

let cell = tableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath) as! jobCell

从leadingSwipeActionsConfigurationForRowAt

更改jobStatus值

var jobStatus: Bool = true {
    didSet {
        //your color for complete/incomplete
        jobCompleteBar.backgroundColor = jobStatus ? .green : .red
    }
}

在刷卡时切换TableViewCell中框的颜色

1 个答案: