滚动更改表中动态单元格的顺序- Swift 2.3

Question

我有一个，它充当Review屏幕，它基本上有一些带有静态内容的单元格(例如标头)和其他具有动态内容的单元格(例如在以前的视图上选择的服务列表)。我遇到的问题是，如果我向上滚动到视图的底部，然后再向上滚动看到顶部，我注意到动态单元格的顺序发生了变化。

例如，：

当视图第一次呈现时，我按以下顺序看到服务列表：1)美甲 2)修脚 3) 30分钟桑拿

​

但是，如果我再次向下滚动和向上滚动，我会看到以下情况：1) 30分钟桑拿 2)修脚 3)美甲

​

下面是呈现每个单元格的代码：

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

        if (indexPath.row == 0) {
            //static header cell
            self.index = 0
            let headerCell = tableView.dequeueReusableCellWithIdentifier("headerCell", forIndexPath: indexPath)
            return headerCell

        } else if (indexPath.row == 1) {
            //static instruction cell
            self.index = 0
            let instructionCell = tableView.dequeueReusableCellWithIdentifier("instructionCell", forIndexPath: indexPath)
            return instructionCell

        } else if (indexPath.row == 2) {
            //static services section header cell
            self.index = 0
            let servicesSectionHeaderCell = tableView.dequeueReusableCellWithIdentifier("servicesSectionHeaderCell", forIndexPath: indexPath)
            return servicesSectionHeaderCell

        } else if ((indexPath.row <= (self.services.count + 2)) && (indexPath.row > 2) && !self.services.isEmpty) {
            //dynamic service cells
            let serviceCell = tableView.dequeueReusableCellWithIdentifier("serviceCell", forIndexPath: indexPath) as! ServiceCell
            serviceCell.serviceLabel.text = self.services[self.index]
            self.index += 1
            return serviceCell

        } else if (indexPath.row == (self.services.count + 3)) {
            //static appointment time section header cell
            self.index = 0
            let appointmentTimeSectionHeaderCell = tableView.dequeueReusableCellWithIdentifier("appointmentTimeSectionHeaderCell", forIndexPath: indexPath)
            return appointmentTimeSectionHeaderCell
        } else if (indexPath.row == (self.services.count + 4)) {
            //static date and time cell
            self.index = 0
            let dateAndTimeCell = tableView.dequeueReusableCellWithIdentifier("dateAndTimeCell", forIndexPath: indexPath) as! DateAndTimeCell
            dateAndTimeCell.dateAndTimeLabel.text = self.orderReview.serviceDate + SINGLE_WHITE_SPACE_STRING_CONSTANT + self.orderReview.serviceTime
            return dateAndTimeCell
        } else {
            //default cell
            self.index = 0
            let cell = UITableViewCell()
            return cell
        }
    }

Answer 1

您的问题是self.index的使用。它的值似乎取决于调用cellForRow的顺序。那根本行不通。

去掉self.index并根据indexPath的值建立索引。

} else if ((indexPath.row <= (self.services.count + 2)) && (indexPath.row > 2) && !self.services.isEmpty) {
    //dynamic service cells
    let serviceCell = tableView.dequeueReusableCellWithIdentifier("serviceCell", forIndexPath: indexPath) as! ServiceCell
    serviceCell.serviceLabel.text = self.services[indexPath.row - 3]

    return serviceCell