Question

在我的应用程序中，我实现了Expandable tableview，它运行得很好但是现在我想要改变第一部分已经是可扩展模式但是我无法做到这一点，请帮助我这样做..

这里我实现了我自己的本机代码，用于创建不使用任何第三方库的可扩展tableview。

在这里，我发布了Expandable TableView的完整代码..

@IBOutlet weak var tableViewSecond: UITableView!
var hidden = [true]

override func viewDidLoad() {
    super.viewDidLoad()
    tableViewSecond.delegate = self
    tableViewSecond.dataSource = self
    InspectionArray = [["inspection_name":"AVM Inspection"], ["inspection_name":"Simple Inspection"], ["inspection_name":"BVM Inspection"]]
    InspectionSectionArray = [["inspection_Session":"Current Inspection"], ["inspection_Session":"Past Inspection"], ["inspection_Session":"Future Inspection"]]
}

func numberOfSections(in tableView: UITableView) -> Int {
    for _ in 0..<InspectionSectionArray.count {
        hidden.append(true)
    }
    return InspectionSectionArray.count
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    if hidden[section] {
        return 0
    } else {
        return InspectionArray.count
    }
}
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
    let headerView = UIView()
    headerView.backgroundColor = UIColor.orange
    headerView.tag = section

    let label = UILabel()
    label.text = (InspectionSectionArray[section] as AnyObject).value(forKey: "inspection_Session") as? String
    label.frame = CGRect(x: 45, y: 5, width: 150, height: 35)
    label.font = UIFont.boldSystemFont(ofSize: 15)
    headerView.addSubview(label)
    label.tag = section

    let tapForheaderView = UITapGestureRecognizer(target: self, action: #selector(SecondViewController.tapFunction))
    headerView.isUserInteractionEnabled = true
    headerView.addGestureRecognizer(tapForheaderView)

    return headerView
}
func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
    return 2
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
    return 45
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    var cell = tableView.dequeueReusableCell(withIdentifier: "SecondTableViewCell", for: indexPath) as? SecondTableViewCell
    if cell == nil {
        cell = UITableViewCell(style: .default, reuseIdentifier: "SecondTableViewCell") as? SecondTableViewCell;
    }
    cell!.dataLbl.text = (InspectionArray[indexPath.row] as AnyObject).value(forKey: "inspection_name") as? String
    return cell!
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    tableView.deselectRow(at: indexPath, animated: true)
    print(indexPath.row)
    print("\(indexPath.section)","\(indexPath.row)")
}

func tapFunction(sender:UITapGestureRecognizer) {
    let section = sender.view!.tag
    let indexPaths = (0..<InspectionArray.count).map { i in return IndexPath(item: i, section: section)  }
    hidden[section] = !hidden[section]
    tableViewSecond.beginUpdates()
    if hidden[section] {
        tableViewSecond.deleteRows(at: indexPaths, with: .fade)
    } else {
        tableViewSecond.insertRows(at: indexPaths, with: .fade)
    }
    tableViewSecond.endUpdates()
}

Answer 1

只需更改此功能

func tapFunction(sender: UITapGestureRecognizer?) {

    var section = 0

    if sender != nil {
        section = sender!.view!.tag
    }

    let indexPaths = (0..<InspectionArray.count).map { i in return IndexPath(item: i, section: section)  }
    hidden[section] = !hidden[section]
    tableViewSecond.beginUpdates()
    if hidden[section] {
        tableViewSecond.deleteRows(at: indexPaths, with: .fade)
    } else {
        tableViewSecond.insertRows(at: indexPaths, with: .fade)
    }
    tableViewSecond.endUpdates()
}

并在self.tapFunction(sender: nil)中致电viewdidLoad。

Answer 2

我相信你只需要改变这个：

// declare hidden as this
var hidden: [Bool] = []

override func viewDidLoad() {
    super.viewDidLoad()
    InspectionArray = [["inspection_name":"AVM Inspection"], ["inspection_name":"Simple Inspection"], ["inspection_name":"BVM Inspection"]]
    InspectionSectionArray = [["inspection_Session":"Current Inspection"], ["inspection_Session":"Past Inspection"], ["inspection_Session":"Future Inspection"]]

    // initialize hidden array so that the first is false and the rest true
    hidden = Array<Bool>(repeating: true, count: InspectionSectionArray.count)
    hidden[0] = false

    tableViewSecond.delegate = self
    tableViewSecond.dataSource = self
}

// and change numberOfSections to this
func numberOfSections(in tableView: UITableView) -> Int {
    return InspectionSectionArray.count
}

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