prepareForSegue错误线程1：EXC_BREAKPOINT（代码= EXC_I386_BPT，子代码= 0x0）

Question

我的代码很简单：

var searchResults1: [(name:String, description:String)]=[]
var searchResults2: [(name:String, description:String)]=[]
var searchResults3: [(name:String, description:String)]=[]

var situation1 = [(name: "qq", description: "ww"), (name: "ee", description: "rr"), (name: "tt", description: "yy"), (name: "aa", description: "ss")]
var situation2 = [(name: "qq", description: "ff"), (name: "gg", description: "hh"), (name: "jj", description: "kk"), (name: "ll", description: "ii")]
var situation3 = [(name: "zz", description: "xx"), (name: "cc", description: "vv"), (name: "bb", description: "nn"), (name: "mm", description: "as"), (name: "we", description: "sd"), (name: "xc", description: "gf")]

override func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String?
{
    switch section {
    case 0:
        return "I"
    case 1:
        return "II"
    case 2:
        return "III"
    case 3:
        return "IV"
    case 4:
        return "V"
    case 5:
        return "VI"
    case 6:
        return "VII"
    case 7:
        return "VIII"
    case 8:
        return "IX"
    case 9:
        return "X"
    case 10:
        return "XI"
    case 11:
        return "XII"

    default:
        return nil
    }
}

override func numberOfSectionsInTableView(tableView: UITableView) -> Int
{
    return 12
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath 
 indexPath: NSIndexPath) -> UITableViewCell {
    let identifier = "cell"
    var cell = tableView.dequeueReusableCellWithIdentifier("cell") as? UITableViewCell

    if cell == nil {
            cell = UITableViewCell(style: UITableViewCellStyle.Value1, reuseIdentifier: identifier)
        }

    if (indexPath.section == 0) {

        if tableView == self.searchDisplayController!.searchResultsTableView {
            cell!.textLabel.text = searchResults1[indexPath.row].name

        } else {
            cell!.textLabel.text = situation1[indexPath.row].name



        }

        return cell!
    }


    if (indexPath.section == 1) {

        if tableView == self.searchDisplayController!.searchResultsTableView {
            cell!.textLabel.text = searchResults2[indexPath.row].name

        } else {
              cell!.textLabel.text = situation2[indexPath.row].name

        }
        return cell!
    }

    if (indexPath.section == 2) {

        if tableView == self.searchDisplayController!.searchResultsTableView {
            cell!.textLabel.text = searchResults3[indexPath.row].name

        } else {

        cell!.textLabel.text = situation3[indexPath.row].name

        }
        return cell!
    }
    return cell!
}

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    switch section {
    case 0:
        if tableView == self.searchDisplayController!.searchResultsTableView {
            return self.searchResults1.count
        } else {

            return situation1.count }


    case 1:
        if tableView == self.searchDisplayController!.searchResultsTableView {
            return self.searchResults2.count
        } else {
            return situation2.count }

    case 2:

        if tableView == self.searchDisplayController!.searchResultsTableView {
            return self.searchResults3.count
        } else {
            return situation3.count }

            default:
        return 0
        }
    }




func filterContentForSearchText (searcText: String) {

    searchResults1 = situation1.filter{($0.name as NSString).localizedCaseInsensitiveContainsString("\(searcText)")}
    searchResults2 = situation2.filter{($0.name as NSString).localizedCaseInsensitiveContainsString("\(searcText)")}
    searchResults3 = situation3.filter{($0.name as NSString).localizedCaseInsensitiveContainsString("\(searcText)")}
 }


func searchDisplayController(controller:UISearchDisplayController, shouldReloadTableForSearchString searchString: String!) -> Bool {
    self.filterContentForSearchText(searchString)
    return true
}

override func tableView(tableView:UITableView, didSelectRowAtIndexPath indexPath:NSIndexPath){
    if tableView == self.searchDisplayController!.searchResultsTableView {
        self.performSegueWithIdentifier("showDetail", sender: self)
    }

}

这很好。

当我点击单元格searchResultsTableView错误输出时：线程1：EXC_BREAKPOINT（代码= EXC_I386_BPT，子代码= 0x0）

示例代码函数prepareForSegue：

  override func prepareForSegue(segue: UIStoryboardSegue, sender:AnyObject!) {
    if segue.identifier == "showDetail" {
        let cell = sender as UITableViewCell
        var indexPath = tableView.indexPathForCell(cell)!

        switch (indexPath.section) {
        case 0:

            if self.searchDisplayController!.active {
                var indexPath = tableView.indexPathForSelectedRow()
                indexPath = self.searchDisplayController!.searchResultsTableView.indexPathForSelectedRow()
                var destViewController: DetailViewController = segue.destinationViewController as DetailViewController
                destViewController.title = searchResults1[indexPath!.row].name
                destViewController.situation = searchResults1[indexPath!.row]
            }
            else {
                var indexPath = tableView.indexPathForSelectedRow()
                let destViewController:DetailViewController! = segue.destinationViewController as DetailViewController
                destViewController.title = situation1[indexPath!.row].name
                destViewController.situation = situation1[indexPath!.row]
            }
        case 1:
            if self.searchDisplayController!.active {
                var indexPath = tableView.indexPathForSelectedRow()
                indexPath = self.searchDisplayController!.searchResultsTableView.indexPathForSelectedRow()!
                var destViewController: DetailViewController = segue.destinationViewController as DetailViewController
                destViewController.title = searchResults2[indexPath!.row].name
                destViewController.situation = searchResults2[indexPath!.row]

            }
            else {
                var indexPath = tableView.indexPathForSelectedRow()
                let destViewController:DetailViewController! = segue.destinationViewController as DetailViewController
                destViewController.title = situation2[indexPath!.row].name
                destViewController.situation = situation2[indexPath!.row]
            }

        default:
            break
        }


        }

你能否建议我如何修改prepareForSegue函数？

链接到DropBox https://www.dropbox.com/sh/3yeowjurweo3xdo/AAAh7S-N89XPSqi-Xr8M5WmPa?dl=0

中的项目

谢谢！

Answer 1

您的performSegueWithIdentifier来电通过self作为sender参数：

self.performSegueWithIdentifier("showDetail", sender: self)

您的prepareForSegue方法希望发件人成为UITableViewCell：

let cell = sender as UITableViewCell

所以我猜测崩溃就在那一行，其中强制转换会失败，因为你的UITableView派生类不能转换为UITableViewCell。

Answer 2

试试这个：

     1.  self.performSegueWithIdentifier("showDetail", sender: cell!)

     2.  if segue.identifier == "showDetail" {


        let cell = sender as UITableViewCell

        var ip = tableView.indexPathForCell(cell);
        if (ip == nil) {
            ip = self.searchDisplayController!.searchResultsTableView.indexPathForCell(cell);
        }

        var indexPath = ip!
        switch (indexPath.section) {
        case 0: