ios - 为什么页眉和页脚在删除时会跟随行的移动？

Question

我正在用 Swift 构建一个严重依赖 TableView 的应用程序。它同时使用页眉和页脚，以及行删除。出于某种奇怪的原因，当我执行行删除时，页眉和页脚跟随要删除的行的滑动移动。下面的截图解释了我的意思。

如何避免这种情况？

我正在像这样实现删除功能:

// Deleting
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
    if editingStyle == .Delete {

        // Handling data source updating, cell row deletion, transition...

    }
}

页眉和页脚是这样的:

// ## Header ##
override func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
    let headerCell = tableView.dequeueReusableCellWithIdentifier("shoppingHeader") as! ShoppingTableViewHeaderCell

    // Clear up startup background
    headerCell.textLabel?.backgroundColor = UIColor.clearColor()

    // Add covering background color
    headerCell.backgroundColor = UIColorFromHex(0x22b8a3, alpha: 1)

    // Set store image, or store title if image is unavailable
    let url = NSURL(string: dataSource[sortedStores[section]]["meta_data"]["logo"].string!)
    let data = NSData(contentsOfURL: url!)
    if data != nil { // Store image
        let image = UIImage(data: data!)
        headerCell.imageView?.image = imageResize(image: image!, cellWidth: 90, cellHeight: 30)
    } else { // Store name label
        headerCell.textLabel?.text = dataSource[sortedStores[section]]["meta_data"]["nameStore"].string
        headerCell.textLabel?.font = UIFont(name: "HelveticaNeue-Light", size: 16)
        headerCell.textLabel?.textColor = UIColor.whiteColor()
    }

    // Right hand side details: define strings
    let address = dataSource[sortedStores[section]]["meta_data"]["street"].string
    let distanceMeasure = dataSource[sortedStores[section]]["meta_data"]["distance"].int!
    let numberOfOffers = dataSource[sortedStores[section]]["offers"].count

    // Right hand side details: assign strings to variables
    headerCell.rightLabel0.text = address
    headerCell.rightLabel1.text = "\(distanceMeasure) m away"
    if numberOfOffers == 1 {
        headerCell.rightLabel2.text = "1 offer available"
    } else {
        headerCell.rightLabel2.text = "\(numberOfOffers) offers available"
    }

    // Right hand side details: set text color
    headerCell.rightLabel0.textColor = UIColor.whiteColor()
    headerCell.rightLabel1.textColor = UIColor.whiteColor()
    headerCell.rightLabel2.textColor = UIColor.whiteColor()

    return headerCell
}


// ## Footer ##
override func tableView(tableView: UITableView, viewForFooterInSection section: Int) -> UIView? {
    let footerCell = tableView.dequeueReusableCellWithIdentifier("shoppingFooter") as! UITableViewCell

    // Set black color to show that footer moves too.
    footerCell.backgroundColor = UIColor.blackColor() //clearColor()

    return footerCell
}

Answer 1

只需返回 headerCell.contentView 而不是 headerCell 即可解决您的问题。