swift - TableView 有 3 个部分且单元格崩溃

Question

我有一个简单的 UITableViewController，包含 3 个部分，每个部分有 3 行。我已经为每个单元格分配了重用标识符。当我运行代码时，我在返回 cell 时收到 EXE_BAD_INSTRUCTION 错误。

这是我的代码:

import UIKit

class settingsViewController: UITableViewController {

override func viewDidLoad() {
    super.viewDidLoad()


}

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

// MARK: - Table view data source

override func numberOfSectionsInTableView(tableView: UITableView) -> Int {


    return 3
}

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows
    return 3
}


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

    var cell : UITableViewCell!

    if indexPath.section == 1
    {
        if indexPath.row == 1
        {

            cell = tableView.dequeueReusableCellWithIdentifier("draftCell", forIndexPath: indexPath) as UITableViewCell

        }

        else if indexPath.row == 0
        {
            cell = tableView.dequeueReusableCellWithIdentifier("profileCell", forIndexPath: indexPath) as UITableViewCell




        }

        else if indexPath.row == 2
        {

            cell = tableView.dequeueReusableCellWithIdentifier("logoutCell", forIndexPath: indexPath) as UITableViewCell



        }






    }
    else if indexPath.section == 2{

        if indexPath.row == 0
        {



            cell = tableView.dequeueReusableCellWithIdentifier("facebookCell", forIndexPath: indexPath) as UITableViewCell

        }


        else if indexPath.row == 1
        {


            cell = tableView.dequeueReusableCellWithIdentifier("twitterCell", forIndexPath: indexPath) as UITableViewCell


        }


        else if indexPath.row == 2
        {
            cell = tableView.dequeueReusableCellWithIdentifier("rateusCell", forIndexPath: indexPath) as UITableViewCell

        }



    }



    else if indexPath.section == 3
    {

        if indexPath.row == 0
        {


            cell = tableView.dequeueReusableCellWithIdentifier("creditsCell", forIndexPath: indexPath) as UITableViewCell

        }



        else if indexPath.row == 1
        {

            cell = tableView.dequeueReusableCellWithIdentifier("contactusCell", forIndexPath: indexPath) as UITableViewCell
        }


        else if indexPath.row == 2
        {


            cell = tableView.dequeueReusableCellWithIdentifier("termsandconditionsCell", forIndexPath: indexPath) as UITableViewCell
        }


    }


    return cell


}

Answer 1

对于第 0 节，您尚未编写 cellForRowAtIndexPath。您给定的节数 = 3，因此其索引从 0 开始，

更正你的indexpath.section比较，即对indexpath.section == 0、indexpath.section == 1和indexpath.section == 2进行比较。

此外，您还没有为 tableview 单元格注册类

self.tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cell")