Segue not setting value to detail view controller

问题

I have a Master-Detail VC set up and I've figured out how to set up a segue to my Detail VC. The code below doesn't crash, but it also doesn't send a value for the label to the VC I'm pushing to.

I'm stumped as to how I pass the value of detailViewController.detailItem = selectedNote?.noteBody to my DetailViewController.

The code below compiles. It does not crash. But it also doesn't set anything on my DetailViewController.

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    // This is my object
    var selectedNote: Note?

    /*
    I do NOT want to use prepareForSegue. I have 2 diff't sets of notes I'm dealing with. One in 
    the managedObjectContext and the other is in filteredObjects array.
    */

    // This gets selectedNote from the fetchedResultsController
    if tableView == self.tableView {
        selectedNote = self.fetchedResultsController.objectAtIndexPath(indexPath) as? Note // <--this is "everything"
    } else {
        // This get a note from the filteredObjects array
        // This statement is necessary to unwrap the optional
        if let filteredObjects = filteredObjects {
            selectedNote = filteredObjects[indexPath.row]
        }
    }

    // Set up the detail view controller to show.
    let detailViewController = DetailViewController()

    // This is nil. I want to to set a value on the detailVC before I segue
    self.detailViewController!.detailItem = selectedNote?.noteBody

    // Note: Should not be necessary but current iOS 8.0 bug requires it.
    tableView.deselectRowAtIndexPath(tableView.indexPathForSelectedRow()!, animated: false)

    // this does the segue.
    navigationController?.pushViewController(detailViewController, animated: true)

}

I'm missing something very easy here, but I can't figure it out. Here is my DetailViewController:

import UIKit
import CoreData

class DetailViewController: UIViewController {

    @IBOutlet var detailDescriptionLabel: UILabel!

    var note: Note?

    var detailItem: AnyObject? = nil {
        didSet {
            // Update the view.
            self.configureView()
        }
    }
    func configureView() {
        // Update the user interface for the detail item.
        if let detail = self.detailItem as? Note {
            note = detail
            if let label = self.detailDescriptionLabel {
                label.text = detail.noteBody
            }
        }
    }


    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view, typically from a nib.
        self.configureView()
    }

Here's my Note class:

class Note: NSManagedObject {

    @NSManaged var dateCreated: NSDate
    @NSManaged var dateEdited: NSDate
    @NSManaged var noteTitle: String
    @NSManaged var noteBody: String

}

来源：https://stackoverflow.com/questions/28801266/segue-not-setting-value-to-detail-view-controller

标签

ios

swift

uiviewcontroller

segue