將行添加到Detail視圖控制器的Swift數組中將不起作用

Question

我有一個事件列表，其中每個事件都將數據傳遞給具有來自核心數據模型的對象的詳細VC。例如，一個Event可以有一個標題，日期，房間，isFavorite等。現在，從DetailVC，我有一個「添加到我的日程安排」按鈕，讓用戶選擇他們最喜歡的活動參加。一旦點擊了，我想將這個對象保存到一個數組中。

我得到這個ERROR1：

不能調用類型爲String的參數列表追加。

詳細視圖控制器：

class DetailViewController: UIViewController, UITableViewDataSource, UITableViewDelegate { 

    var managedObjectContext: NSManagedObjectContext? = nil 

    // @IBOutlet weak var detailDescriptionLabel: UILabel! 

    @IBOutlet weak var tableView: UITableView! 

    //create a new array to hold on favorite objects (sessions add it to My Schedule) 
    var favesArray = [Event]() 

    var detailItem: Event! 

這是詳細信息視圖控制器cellForRowAtIndexPath：

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

    if indexPath.section == Sections.info && indexPath.row == 1 { 
     let cell: TitleCell = tableView.dequeueReusableCellWithIdentifier("faveCell", forIndexPath: indexPath) as! TitleCell 

     if detailItem.isFavorite.boolValue { 
      cell.valueFaveButton.setTitle("Remove from My Schedule", forState: .Normal) 
     } else { 
      cell.valueFaveButton.setTitle("Add to My Schedule", forState: .Normal) 
     } 

     cell.valueFaveButton.addTarget(self, action: "myScheduleButton:", forControlEvents: .TouchUpInside) 

     return cell 

    } else if indexPath.section == Sections.info && indexPath.row == 0 { 

     let cell: TitleCell = tableView.dequeueReusableCellWithIdentifier("TitleCell", forIndexPath: indexPath) as! TitleCell 

     let dateFormatter = NSDateFormatter() 
     dateFormatter.dateFormat = "hh:mm" 
     var dateString = dateFormatter.stringFromDate(detailItem!.date) 

     cell.titleLabel.text = detailItem?.title 
     cell.fieldLabel.text = dateString 

     return cell 

    } else if indexPath.section == Sections.info && indexPath.row == 2 { 
     let cell: RemoveFaveCell = tableView.dequeueReusableCellWithIdentifier("removeFaveCell", forIndexPath: indexPath) as! RemoveFaveCell 

     cell.removeFaveButton.addTarget(self, action: "removeFavoriteButton:", forControlEvents: .TouchUpInside) 

     return cell 

    } else if indexPath.section == Sections.description { 

     let cell: LabelCell = tableView.dequeueReusableCellWithIdentifier("labelCell", forIndexPath: indexPath) as! LabelCell 

     cell.labelDescriptionField.text = "Swift is the new language from Apple." 

     return cell 
    } else { 

     assertionFailure("Unhandled session table view section") 
     let cell = tableView.dequeueReusableCellWithIdentifier("reuseIdentifier", forIndexPath: indexPath) as! UITableViewCell 

     return cell 
    } 
} 

    func myScheduleButton(sender: UIButton) { 


     detailItem.isFavorite = !detailItem.isFavorite.boolValue 

     tableView.reloadSections(NSIndexSet(index: Sections.info), withRowAnimation: .Automatic) 

     //now add this clicked/save object(event row) over the faves array 


     //1 yellow warning in next line:Conditional Cast from Event to Event always succeeds. But it compiles fine. 
     if let faveSession:Event = detailItem as? Event { 

      self.favesArray.append(faveSession) 
     } 


    } 

想不通這一點呢。這是否是一種有效的方法來與核心數據對象一起使用，以便作爲新數組保存起來？在我的情況下，當按下名爲「我的計劃」的分段按鈕時，會顯示此信息。謝謝您的回答。

Event.swift

class Event: NSManagedObject { 
 

 
    @NSManaged var date: NSDate 
 
    @NSManaged var isFavorite: NSNumber 
 
    @NSManaged var timeStamp: NSDate 
 
    @NSManaged var title: String 
 
    @NSManaged var classSelected: String 
 
    @NSManaged var desc: String 
 
    
 
}

顯示我的日程表（favesArray對象detailVC選擇）

@IBAction func FilterHSClassesByPeriod(sender: UISegmentedControl) { 
 
     let classSelected: String? 
 
     
 
     if sender.selectedSegmentIndex == 0 { 
 
      classSelected = "Period 1" 
 
     }else { 
 
      classSelected = "My Schedule" 
 
     }   
 
     
 
     let filterPredicate = NSPredicate(format: "classSelected = %@", classSelected!) 
 
     var request: NSFetchRequest = self.fetchedResultsController.fetchRequest 
 
     
 
     request.predicate = filterPredicate   
 
     
 
     var e: NSError? = nil 
 
     
 
     self.fetchedResultsController.performFetch(&e)   
 
     
 
     self.tableView.reloadData() 
 
     
 
    }

Answer 1

你DEF INE favesArray作爲事件的數組：

var favesArray = [Event]() 

但是你想追加一個字符串

if let faveSession:String = detailItem.title as? String { 
    self.favesArray.append(faveSession) 
} 

如果你希望能夠追加事件和字符串你需要改變你的宣言是：

var favesArray = [AnyObject]() 

或（如果可能）投你faveSession到事件，而不是字符串，但只有你可以決定是否有可能

if let faveSession:Event = detailItem.title as? Event { 
    self.favesArray.append(faveSession) 
}