麻烦与ViewControllers之间的segue

这是我的代码：

import UIKit import CoreData class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() var logo = UIImage(named: "no_pain_no_gain-_.jpg") logoImage.image = logo viewExercisesButton.frame = CGRectMake(-30,250,125,125) viewExercisesButton.addTarget(self, action: "viewExercisesButtonTouch:", forControlEvents: UIControlEvents.TouchDown) viewExercisesButton.setImage(imageViewExercises, forState: .Normal) viewExercisesButton.imageEdgeInsets = UIEdgeInsetsMake(30,30,30,30) self.view.addSubview(viewExercisesButton) } var moc = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext var fetchedResultsController: NSFetchedResultsController? var daysArray1 = [TrainingDay]() @IBOutlet var logoImage: UIImageView! var viewExercisesButton = UIButton.buttonWithType(UIButtonType.Custom) as! UIButton var imageViewExercises = UIImage(named: "plusbutton.png") func viewExercisesButtonTouch(sender: UIButton!) { performSegueWithIdentifier("goToDays", sender: self) println("future event will be added, button working fine - view") } } 

这第一个去：

 import UIKit import CoreData class ViewExercisesViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, NSFetchedResultsControllerDelegate { override func viewDidLoad() { fetchedResultsController = NSFetchedResultsController(fetchRequest: fetchTrainingDetails(), managedObjectContext: moc!, sectionNameKeyPath: nil, cacheName: nil) fetchedResultsController?.delegate = self fetchedResultsController?.performFetch(nil) self.viewExerciseTableView.reloadData() sundayButton.frame = CGRectMake(-30,50,125,125) sundayButton.addTarget(self, action: "sundayButtonTouch:", forControlEvents: UIControlEvents.TouchDown) sundayButton.setImage(imageSunday, forState: .Normal) sundayButton.imageEdgeInsets = UIEdgeInsetsMake(30,30,30,30) self.view.addSubview(sundayButton) mondayButton.frame = CGRectMake(120,50,125,125) mondayButton.addTarget(self, action: "mondayButtonTouch:", forControlEvents: UIControlEvents.TouchDown) mondayButton.setImage(imageMonday, forState: .Normal) mondayButton.imageEdgeInsets = UIEdgeInsetsMake(30,30,30,30) self.view.addSubview(mondayButton) tuesdayButton.frame = CGRectMake(270,50,125,125) tuesdayButton.addTarget(self, action: "tuesdayButtonTouch:", forControlEvents: UIControlEvents.TouchDown) tuesdayButton.setImage(imageTuesday, forState: .Normal) tuesdayButton.imageEdgeInsets = UIEdgeInsetsMake(30,30,30,30) self.view.addSubview(tuesdayButton) wednesdayButton.frame = CGRectMake(-30,150,125,125) wednesdayButton.addTarget(self, action: "wednesdayButtonTouch:", forControlEvents: UIControlEvents.TouchDown) wednesdayButton.setImage(imageWednesday, forState: .Normal) wednesdayButton.imageEdgeInsets = UIEdgeInsetsMake(30,30,30,30) self.view.addSubview(wednesdayButton) thursdayButton.frame = CGRectMake(70,150,125,125) thursdayButton.addTarget(self, action: "thursdayButtonTouch:", forControlEvents: UIControlEvents.TouchDown) thursdayButton.setImage(imageThursday, forState: .Normal) thursdayButton.imageEdgeInsets = UIEdgeInsetsMake(30,30,30,30) self.view.addSubview(thursdayButton) fridayButton.frame = CGRectMake(170,150,125,125) fridayButton.addTarget(self, action: "fridayButtonTouch:", forControlEvents: UIControlEvents.TouchDown) fridayButton.setImage(imageFriday, forState: .Normal) fridayButton.imageEdgeInsets = UIEdgeInsetsMake(30,30,30,30) self.view.addSubview(fridayButton) saturdayButton.frame = CGRectMake(270,150,125,125) saturdayButton.addTarget(self, action: "saturdayButtonTouch:", forControlEvents: UIControlEvents.TouchDown) saturdayButton.setImage(imageSaturday, forState: .Normal) saturdayButton.imageEdgeInsets = UIEdgeInsetsMake(30,30,30,30) self.view.addSubview(saturdayButton) } //VAR AND LET var sundayButton = UIButton.buttonWithType(UIButtonType.Custom) as! UIButton var imageSunday = UIImage(named: "day.png") var mondayButton = UIButton.buttonWithType(UIButtonType.Custom) as! UIButton var imageMonday = UIImage(named: "day.png") var tuesdayButton = UIButton.buttonWithType(UIButtonType.Custom) as! UIButton var imageTuesday = UIImage(named: "day.png") var wednesdayButton = UIButton.buttonWithType(UIButtonType.Custom) as! UIButton var imageWednesday = UIImage(named: "day.png") var thursdayButton = UIButton.buttonWithType(UIButtonType.Custom) as! UIButton var imageThursday = UIImage(named: "day.png") var fridayButton = UIButton.buttonWithType(UIButtonType.Custom) as! UIButton var imageFriday = UIImage(named: "day.png") var saturdayButton = UIButton.buttonWithType(UIButtonType.Custom) as! UIButton var imageSaturday = UIImage(named: "day.png") @IBOutlet var viewExerciseTableView: UITableView! var daysArray = [TrainingDay]() var detailsArray = [TrainingDetails]() var moc = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext var fetchedResultsController: NSFetchedResultsController? // FUNCTIONS func sundayButtonTouch(sender: UIButton!) { println("future event will be added, button working fine - sunday") } func mondayButtonTouch(sender: UIButton!) { println("future event will be added, button working fine - monday") } func tuesdayButtonTouch(sender: UIButton!) { println("future event will be added, button working fine - tuesday") } func wednesdayButtonTouch(sender: UIButton!) { println("future event will be added, button working fine - wednesday") } func thursdayButtonTouch(sender: UIButton!) { println("future event will be added, button working fine - thursday") } func fridayButtonTouch(sender: UIButton!) { println("future event will be added, button working fine - friday") } func saturdayButtonTouch(sender: UIButton!) { println("future event will be added, button working fine - saturday") } // FETCH REQUEST METHODS func fetchTrainingDay() -> NSFetchRequest { let fetchRequest = NSFetchRequest(entityName: "TrainingDay") fetchRequest.predicate = nil let sortDescriptor = NSSortDescriptor(key: "day", ascending: true) fetchRequest.sortDescriptors = [sortDescriptor] fetchRequest.fetchBatchSize = 20 return fetchRequest } func fetchTrainingDetails() -> NSFetchRequest { let currentDay = daysArray let fetchRequest = NSFetchRequest(entityName: "TrainingDetails") var predicate = NSPredicate(format: "trainingDay = %@", currentDay) fetchRequest.predicate = predicate let sortDescriptor1 = NSSortDescriptor(key: "exerciseName", ascending: true) let sortDescriptor2 = NSSortDescriptor(key: "repsNumber", ascending: true) let sortDescriptor3 = NSSortDescriptor(key: "setsNumber", ascending: true) fetchRequest.sortDescriptors = [sortDescriptor1, sortDescriptor2, sortDescriptor3] fetchRequest.fetchBatchSize = 20 return fetchRequest } //TABLE VIEW DELEGATE METHODS func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return fetchedResultsController?.sections?[section].numberOfObjects ?? 0 } func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { let cellIdentifier = "exCell" var cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier) as? UITableViewCell if cell == nil { cell = UITableViewCell(style: UITableViewCellStyle.Value2, reuseIdentifier: cellIdentifier) } let row = indexPath.row println("\(row)") let details = detailsArray[indexPath.row] cell!.textLabel!.text = details.exerciseName cell?.detailTextLabel?.text = "Sets: #\(details.setsNumber) Reps: #\(details.repsNumber)" return cell! } // MARK: NSFetchedResultsControllerDelegate func controllerWillChangeContent(controller: NSFetchedResultsController) { self.viewExerciseTableView.beginUpdates() } func controller(controller: NSFetchedResultsController, didChangeObject anObject: AnyObject, atIndexPath indexPath: NSIndexPath?, forChangeType type: NSFetchedResultsChangeType, newIndexPath: NSIndexPath?) { switch(type) { case .Insert: if let newIndexPath = newIndexPath { viewExerciseTableView.insertRowsAtIndexPaths([newIndexPath], withRowAnimation:UITableViewRowAnimation.Fade) } case .Delete: if let indexPath = indexPath { viewExerciseTableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Fade) } case .Update: break case .Move: if let indexPath = indexPath { if let newIndexPath = newIndexPath { viewExerciseTableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Fade) viewExerciseTableView.insertRowsAtIndexPaths([newIndexPath], withRowAnimation: UITableViewRowAnimation.Fade) } } } } func controller(controller: NSFetchedResultsController, didChangeSection sectionInfo: NSFetchedResultsSectionInfo, atIndex sectionIndex: Int, forChangeType type: NSFetchedResultsChangeType) { switch(type) { case .Insert: viewExerciseTableView.insertSections(NSIndexSet(index: sectionIndex), withRowAnimation: UITableViewRowAnimation.Fade) case .Delete: viewExerciseTableView.deleteSections(NSIndexSet(index: sectionIndex), withRowAnimation: UITableViewRowAnimation.Fade) default: break } } func controllerDidChangeContent(controller: NSFetchedResultsController) { viewExerciseTableView.endUpdates() } } 

这第二个在这里。

现在，当我尝试在这两个之间继续时，发生这种情况：

未来的事件将被添加，button工作正常 – 查看2015-08-20 15：05：58.047适合保险丝[941：13395] – [Swift._SwiftDeferredNSArray longLongValue]：无法识别的select器发送到实例0x7f920a651230 2015-08-20 15:05 ：58.053适合保险丝[941：13395]由于未捕获的exception“NSInvalidArgumentException”，原因：' – [Swift._SwiftDeferredNSArray longLongValue]：无法识别的select器发送到实例0x7f920a651230' 第一个抛出调用堆栈：

有人知道这是为什么发生？

UPDATE

我这样做：

 func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { let cell = tableView.dequeueReusableCellWithIdentifier("exCell", forIndexPath: indexPath) as! UITableViewCell let details = fetchedResultsController!.objectAtIndexPath(indexPath) as! TrainingDetails cell.textLabel!.text = "\(details.exerciseName)" //CRASHES RIGHT HERE: Thread 1:EXC_BAD_ACCESS(code=1, address=0x0) cell.detailTextLabel!.text = "Sets: #\(details.setsNumber) Reps: #\(details.repsNumber)" return cell } 

Answer 1

为了在Core Data中保存正确的东西，这个方法应该是这样的：

 func appendTrainingDetailsToArray () { let nameLabel = exerciseName.text namesArray.append(nameLabel) let numberOfSets = setsNumber.text?.toInt() setsArray.append(numberOfSets!) let numberOfReps = repsNumber.text?.toInt() repsArray.append(numberOfReps!) let row = daysPickerView.selectedRowInComponent(0) let currentDay = daysArray[row] let detailsEntity = NSEntityDescription.entityForName("TrainingDetails", inManagedObjectContext: moc!) let trainingdetails = TrainingDetails(entity: detailsEntity!, insertIntoManagedObjectContext: moc) trainingdetails.exerciseName = exerciseName.text trainingdetails.repsNumber = repsNumber.text! trainingdetails.setsNumber = setsNumber.text! trainingdetails.trainingDay = currentDay var error: NSError? moc?.save(&error) if let err = error { var status = err.localizedFailureReason println("\(status)") } else { println("CURRENT SETTING: \(trainingdetails.trainingDay)") } } 

有了这个，代码工作正常！ 学分到@pbasdf