滾動UITableView時，UISwitch多次添加到UITableViewCell-Swift

Question

我正在快速使用UITableView制作一個事件菜單，其中大部分是通過編程完成的，對於該事件菜單中的某些選項，我希望從用戶那里獲得一個布爾值（或是/否）-因此切換會完美無缺。 我將基於單元格標簽文本和部分通過cell.accessoryView添加開關-因為我只希望在2個特定行上進行開關。 問題是添加了開關，然后向下滾動並返回到原始開關，現在我沒有指定的行上還有第二個附加開關，然后向下滾動到底部並且是相同的東西那里。 首先，我想知道是否有更好的方法將開關添加到特定行（使用代碼以編程方式創建單元格），並且為什么會發生這種情況？ 以下代碼片段：

class PrivateNewClientController: UIViewController, UITableViewDataSource, UITableViewDelegate {

@IBOutlet weak var menuTable: UITableView!

let mainOptions = ["Client Name", "Invoicing Email", "Invoicing Address"]
let dateOptions = ["All Day", "Starts", "Ends", "Time Zone"]
let alertOptions = ["How Many Classes", "Shown on Calendar As", "Alert by Email", "Alert by Text"]
let billingOptions = ["Tax Included", "Billing Options"]
let textCellIdentifier = "TextCell"
let NumberOfSections = 4;

//For sections to have different amount of rows
let numberOfRowsAtSection: [Int] = [3, 4, 4, 2]


override func viewDidLoad() {
    super.viewDidLoad()

    //Set the table views delegate and data source to be this class itself
    menuTable.delegate = self
    menuTable.dataSource = self
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    return NumberOfSections
}

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    var rows: Int = 0

    if section < numberOfRowsAtSection.count {
        rows = numberOfRowsAtSection[section]
    }
    return rows
}

func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {

    let spacer: UILabel = UILabel()
    spacer.backgroundColor = UIColor(red: CGFloat(240/255.0), green: CGFloat(240/255.0), blue: CGFloat(244/255.0), alpha: CGFloat(1.0))

    return spacer
}

/*Adding UISwitches here*/

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier(textCellIdentifier, forIndexPath: indexPath) as UITableViewCell
    let row = indexPath.row

    //Configure the switches for swipe options
    let allDaySwitch = UISwitch(frame:CGRectMake(150, 300, 0, 0));
    allDaySwitch.on = false

    let gstSwitch = UISwitch(frame:CGRectMake(150, 300, 0, 0));
    gstSwitch.on = false


    //Assigns row labels based on sections
    if(indexPath.section == 0) {
        let rowTitle = mainOptions[row]

        //Add swipe switches
        if(rowTitle == "All Day") {
            cell.accessoryView = allDaySwitch
        }

        cell.textLabel?.text = rowTitle

    } else if(indexPath.section == 1) {

        let rowTitle = dateOptions[row]
        cell.textLabel?.text = rowTitle

    } else if(indexPath.section == 2) {

        let rowTitle = alertOptions[row]
        cell.textLabel?.text = rowTitle;

    } else {

        let rowTitle = billingOptions[row]

        //Add swipe switches
        if(rowTitle == "Tax Included") {
            cell.accessoryView = gstSwitch
        }

        cell.textLabel?.text = rowTitle
    }

    return cell
}



}

Answer 1

設置accessoryView到零，如果條件不匹配：

if(rowTitle == "All Day") {
    cell.accessoryView = allDaySwitch
}else{
    cell.accessoryView = nil
}