我正在尝试使用核心数据并按顺序和部分加载 table 视图及其内容

I am trying to use Core Data and load a table view with its contents in order and in sections

我可以加载它,我可以加载部分,但我无法正确加载每个部分中的单元格。它从每个部分的开头重新开始,有效地复制每个单元格。我的实体名称是 Customer,它具有以下属性。 firstName、lastName、phoneNumber、email、notes 和 first。 First 是用于各部分的姓氏中的第一个字母。我可以加载它,headers 加载成功但是一旦我开始添加姓氏中首字母相同的名字,它就开始搞砸了。如果您需要更多代码,请告诉我。

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

        //getSections()
        let cell =
        tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath!)

        let cust = customers[(indexPath?.section)!]
        print(indexPath?.row)
        let fName = cust.valueForKey("firstName") as? String
        print(fName)
        let lName = cust.valueForKey("lastName") as? String
        print(lName)
        cell.textLabel!.text = fName! + " " + lName!
        print("Cell: \(cell.textLabel!.text)")

        return cell


}
override func viewDidLoad() {
        super.viewDidLoad()


    let appDelegate =
    UIApplication.sharedApplication().delegate as! AppDelegate

    let managedContext = appDelegate.managedObjectContext
    context = managedContext

    //2
    let fetchRequest = NSFetchRequest(entityName:"Customer")
    fetchRequest.sortDescriptors = [NSSortDescriptor(key: "lastName", ascending: true)]

    //3
    //var error: NSError?

    let fetchedResults = try!
        managedContext.executeFetchRequest(fetchRequest) as? [NSManagedObject]

    if var results = fetchedResults
    {
        customers = results

    }
    else
    {
        print("Could not fetch")
    }

    tableView.reloadData()

    getSections()


}

    func getSections()
    {

    var sections:[String] = []
    for(var i=0;i<customers.count;i++)
    {
        let cust = customers[i]
        sections.append(cust.valueForKey("first") as! String)
    }
    sectionHeadersTotal = sections
    let unique = Array(Set(sections))
    sectionHeaders = unique.sort()
    print(sectionHeaders.count)
    //sectionHeaders = unique

    //return unique.count
}

在此处查看读取分段数据的方法 -

http://www.andrewcbancroft.com/2015/03/05/displaying-data-with-nsfetchedresultscontroller-and-swift/ 和这里 iOS UITableView sections with fetchedResultsController confusion