保存核心数据

Question

我目前是编程的新手。我试图保存核心数据对象，但目前我在保存Coredata时出错并显示错误。专注于保存功能。

） libc ++ abi.dylib：以NSException类型的未捕获异常终止。

//
//  ViewController.swift
//  HitList
//
//

import UIKit
import CoreData

class ViewController: UIViewController, UITableViewDataSource {

    @IBOutlet weak var tableView: UITableView!

    //Change “names” to “people” and [String] to [NSManagedObject]
    var people = [NSManagedObject]()

    @IBAction func addName(sender: AnyObject) {

        let alert = UIAlertController(title: "New Name", message: "Add a new name", preferredStyle: .Alert)

        let saveAction = UIAlertAction(title: "Save",
            style: .Default,
            handler: { (action:UIAlertAction) -> Void in

                let textField = alert.textFields!.first
                self.saveName(textField!.text!)
                self.tableView.reloadData()
        })

        let cancelAction = UIAlertAction(title: "Cancel", style: .Default) {
            (action: UIAlertAction) -> Void in
        }

        alert.addTextFieldWithConfigurationHandler {
            (textField: UITextField) -> Void in
        }

        alert.addAction(saveAction)
        alert.addAction(cancelAction)

        presentViewController(alert, animated: true, completion: nil)

    }

    override func viewDidLoad() {
        super.viewDidLoad()
        title = "\"The List\""
        tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "Cell")
    }

    // MARK: UITableViewDataSource
    func tableView(tableView: UITableView,
        numberOfRowsInSection section: Int) -> Int {
            return people.count
    }

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

            let cell =
            tableView.dequeueReusableCellWithIdentifier("Cell")

            let person = people[indexPath.row]

            cell!.textLabel!.text =
                person.valueForKey("name") as? String

            return cell!
    }

    func saveName(name: String) {
        //1
        let appDelegate =
        UIApplication.sharedApplication().delegate as! AppDelegate

        let managedContext = appDelegate.managedObjectContext

        //2
        let entity =  NSEntityDescription.entityForName("Person",
            inManagedObjectContext:managedContext)

        let person = NSManagedObject(entity: entity!,
            insertIntoManagedObjectContext: managedContext)

        //3
        person.setValue(name, forKey: "name")

        //4
        do {
            try managedContext.save()
            //5
            people.append(person)
        } catch let error as NSError  {
            print("Could not save \(error), \(error.userInfo)")
        }
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

错误：

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIButton copyWithZone:]: unrecognized selector sent to instance 0x7f8089631d50'
*** First throw call stack:
(
    0   CoreFoundation                      0x000000010d6dde65 __exceptionPreprocess + 165
    1   libobjc.A.dylib                     0x000000010f41ddeb objc_exception_throw + 48
    2   CoreFoundation                      0x000000010d6e648d -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
    3   CoreFoundation                      0x000000010d63390a ___forwarding___ + 970
    4   CoreFoundation                      0x000000010d6334b8 _CF_forwarding_prep_0 + 120
    5   CoreFoundation                      0x000000010d5ad652 CFStringCreateCopy + 242
    6   libswiftCore.dylib                  0x000000010f9d52d8 _TTSf4g_d___TFSSCfMSSFT12_cocoaStringPSs9AnyObject__SS + 104
    7   libswiftCore.dylib                  0x000000010f99c9c3 _TFSSCfMSSFT12_cocoaStringPSs9AnyObject__SS + 19
    8   libswiftFoundation.dylib            0x000000010fd6e260 _TF10Foundation24_convertNSStringToStringFGSqCSo8NSString_SS + 16
    9   Gill                                0x000000010d168486 _TToFC4Gill14ViewController8saveNamefS0_FSST_ + 54
    10  UIKit                               0x000000010defc194 -[UIApplication sendAction:to:from:forEvent:] + 92
    11  UIKit                               0x000000010e06b6fc -[UIControl sendAction:to:forEvent:] + 67
    12  UIKit                               0x000000010e06b9c8 -[UIControl _sendActionsForEvents:withEvent:] + 311
    13  UIKit                               0x000000010e06aaf8 -[UIControl touchesEnded:withEvent:] + 601
    14  UIKit                               0x000000010df6b49b -[UIWindow _sendTouchesForEvent:] + 835
    15  UIKit                               0x000000010df6c1d0 -[UIWindow sendEvent:] + 865
    16  UIKit                               0x000000010df1ab66 -[UIApplication sendEvent:] + 263
    17  UIKit                               0x000000010def4d97 _UIApplicationHandleEventQueue + 6844
    18  CoreFoundation                      0x000000010d609a31 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    19  CoreFoundation                      0x000000010d5ff95c __CFRunLoopDoSources0 + 556
    20  CoreFoundation                      0x000000010d5fee13 __CFRunLoopRun + 867
    21  CoreFoundation                      0x000000010d5fe828 CFRunLoopRunSpecific + 488
    22  GraphicsServices                    0x0000000111d1dad2 GSEventRunModal + 161
    23  UIKit                               0x000000010defa610 UIApplicationMain + 171
    24  Gill                                0x000000010d16b2ad main + 109
    25  libdyld.dylib                       0x000000010ff2f92d start + 1
    26  ???                                 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)