我已经搜索了所有地方以找到解决此错误的方法，我还尝试使用 nsuserdefaults、struct 和 global var 将我的 var 传递给其他视图控制器。我正在使用 mmdrawer，并且我在我的第一个视图控制器上设置了一个导航控件，我将其命名为 userOview 和标识符 membersArea。每当我尝试使用 prepareforsegue 时，我都会收到以下错误
Could not cast value of type 'xxxxxxxx.DjInformation' (0x115da8) to 'UINavigationController' (0x3ad405e0).
我的 appdelegate 看起来像这样
import UIKit
import CoreData
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
var centerContainer: MMDrawerController?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
let prefs:NSUserDefaults = NSUserDefaults.standardUserDefaults()
let isLoggedIn:Int = prefs.integerForKey("ISLOGGEDIN") as Int
if (isLoggedIn == 1){
var rootViewController = self.window!.rootViewController
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
var centerViewController = mainStoryboard.instantiateViewControllerWithIdentifier("memberArea") as! userOverview
var leftViewController = mainStoryboard.instantiateViewControllerWithIdentifier("LeftSideViewController") as! LeftSideViewController
var rightViewController = mainStoryboard.instantiateViewControllerWithIdentifier("RightSideViewController")as! RightSideViewController
var leftSideNav = UINavigationController(rootViewController: leftViewController)
var centerNav = UINavigationController(rootViewController: centerViewController)
var rightNav = UINavigationController(rootViewController: rightViewController)
centerContainer = MMDrawerController(centerViewController: centerNav, leftDrawerViewController: leftSideNav,rightDrawerViewController:rightNav)
centerContainer!.openDrawerGestureModeMask = MMOpenDrawerGestureMode.PanningCenterView;
centerContainer!.closeDrawerGestureModeMask = MMCloseDrawerGestureMode.PanningCenterView;
window!.rootViewController = centerContainer
window!.makeKeyAndVisible()
UIApplication.sharedApplication().setStatusBarHidden(true, withAnimation: UIStatusBarAnimation.None)
}
return true
}
func applicationWillResignActive(application: UIApplication) {
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}
func applicationDidEnterBackground(application: UIApplication) {
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
func applicationWillEnterForeground(application: UIApplication) {
// Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}
func applicationDidBecomeActive(application: UIApplication) {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
func applicationWillTerminate(application: UIApplication) {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
// Saves changes in the application's managed object context before the application terminates.
self.saveContext()
}
// MARK: - Core Data stack
lazy var applicationDocumentsDirectory: NSURL = {
// The directory the application uses to store the Core Data store file. This code uses a directory named "bfd.Be_Fit_Donate" in the application's documents Application Support directory.
let urls = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)
return urls[urls.count-1] as! NSURL
}()
lazy var managedObjectModel: NSManagedObjectModel = {
// The managed object model for the application. This property is not optional. It is a fatal error for the application not to be able to find and load its model.
let modelURL = NSBundle.mainBundle().URLForResource("Be_Fit_Donate", withExtension: "momd")!
return NSManagedObjectModel(contentsOfURL: modelURL)!
}()
lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator? = {
// The persistent store coordinator for the application. This implementation creates and return a coordinator, having added the store for the application to it. This property is optional since there are legitimate error conditions that could cause the creation of the store to fail.
// Create the coordinator and store
var coordinator: NSPersistentStoreCoordinator? = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)
let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("Be_Fit_Donate.sqlite")
var error: NSError? = nil
var failureReason = "There was an error creating or loading the application's saved data."
if coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil, error: &error) == nil {
coordinator = nil
// Report any error we got.
var dict = [String: AnyObject]()
dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data"
dict[NSLocalizedFailureReasonErrorKey] = failureReason
dict[NSUnderlyingErrorKey] = error
error = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict)
// Replace this with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog("Unresolved error \(error), \(error!.userInfo)")
abort()
}
return coordinator
}()
lazy var managedObjectContext: NSManagedObjectContext? = {
// Returns the managed object context for the application (which is already bound to the persistent store coordinator for the application.) This property is optional since there are legitimate error conditions that could cause the creation of the context to fail.
let coordinator = self.persistentStoreCoordinator
if coordinator == nil {
return nil
}
var managedObjectContext = NSManagedObjectContext()
managedObjectContext.persistentStoreCoordinator = coordinator
return managedObjectContext
}()
// MARK: - Core Data Saving support
func saveContext () {
if let moc = self.managedObjectContext {
var error: NSError? = nil
if moc.hasChanges && !moc.save(&error) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog("Unresolved error \(error), \(error!.userInfo)")
abort()
}
}
}
}
我试图发送prepareforsegue的视图控制器如下
import UIKit
import AVFoundation
import AVKit
import Foundation
import Social
public var AudioPlayer = AVPlayer()
public var SelectedSongNumber = Int()
public var TrackName = String()
public var TrackImage = String()
public var TrackDJ = String()
class MusicListTableViewController: UITableViewController, AVAudioPlayerDelegate{
@IBOutlet weak var playerView: UIView!
@IBOutlet weak var songName: UILabel!
@IBOutlet weak var playButton: UIButton!
@IBOutlet weak var trackDjName: UILabel!
@IBOutlet weak var imageArtwork: UIImageView!
var trackName = [String]()
var artistLabel = [String]()
var trackUrl = [String]()
var artWork = [String]()
var tags = [String]()
var artistId = [String]()
var djInfo = ""
@IBAction func facebookButton(sender: UIButton) {
if SLComposeViewController.isAvailableForServiceType(SLServiceTypeFacebook){
var facebookSheet:SLComposeViewController = SLComposeViewController(forServiceType: SLServiceTypeFacebook)
facebookSheet.setInitialText("Share on Facebook")
self.presentViewController(facebookSheet, animated: true, completion: nil)
} else {
var alert = UIAlertController(title: "Accounts", message: "Please login to a Facebook account to share.", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))
self.presentViewController(alert, animated: true, completion: nil)
}
}
@IBAction func tritterButton(sender: UIButton) {
if SLComposeViewController.isAvailableForServiceType(SLServiceTypeTwitter){
var twitterSheet:SLComposeViewController = SLComposeViewController(forServiceType: SLServiceTypeTwitter)
twitterSheet.setInitialText("Share on Twitter")
self.presentViewController(twitterSheet, animated: true, completion: nil)
} else {
var alert = UIAlertController(title: "Accounts", message: "Please login to a Twitter account to share.", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))
self.presentViewController(alert, animated: true, completion: nil)
}
}
@IBAction func myPlayList(sender: UIButton) {
var centerViewController = self.storyboard?.instantiateViewControllerWithIdentifier("myMusicList") as! myMusicList
var centerNavController = UINavigationController(rootViewController: centerViewController)
var appDelegate:AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
appDelegate.centerContainer!.centerViewController = centerNavController
appDelegate.centerContainer!.toggleDrawerSide(MMDrawerSide.Right, animated: true, completion: nil)
}
@IBAction func favoriteButton(sender: UIButton) {
var favSong = trackName[SelectedSongNumber]
var alertView:UIAlertView = UIAlertView()
alertView.title = "Nummer Toegevoegd"
alertView.message = "Het nummer \(favSong) is nu toegevoegd aan uw favorieten muziek lijst"
alertView.delegate = self
alertView.addButtonWithTitle("OK")
alertView.show()
}
@IBAction func djInformation(sender: UIButton) {
var centerViewController = self.storyboard?.instantiateViewControllerWithIdentifier("djInformation") as! DjInformation
var centerNavController = UINavigationController(rootViewController: centerViewController)
var appDelegate:AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
appDelegate.centerContainer!.centerViewController = centerNavController
appDelegate.centerContainer!.toggleDrawerSide(MMDrawerSide.Right, animated: true, completion: nil)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
var artist_label = artistLabel[SelectedSongNumber]
if (segue.identifier == "djInformation" ){
var detailVC = segue.destinationViewController as! UINavigationController
let targetController = detailVC.topViewController as! DjInformation
targetController.djInfo = "hello"
}
}
func getMusicListJSON(){
let urlString = "http://xxxxxxxxxx"
let urlEncodedString = urlString.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)
let url = NSURL( string: urlEncodedString!)
var task = NSURLSession.sharedSession().dataTaskWithURL(url!) {(data, response, innerError) in
let json = JSON(data: data)
let musicArray = json.arrayValue
//NSLog("\(json)")
dispatch_async(dispatch_get_main_queue(), {
for musiclist in musicArray
{
let track_name = musiclist["track_name"].stringValue
let artist = musiclist["artist"].stringValue
let track_url = musiclist["track_url"].stringValue
let art_work = musiclist["artwork"].stringValue
let track_tags = musiclist["tags"].stringValue
let artist_id = musiclist["artist_id"].stringValue
//println( "track_name: \(track_name) artist: \(artist) track_url: \(track_url) artwork: \(art_work) track_tags: \(track_tags) artist_id: \(artist_id)" )
self.trackName.append(track_name)
self.artistLabel.append(artist)
self.trackUrl.append(track_url)
self.artWork.append(art_work)
self.tags.append(track_tags)
self.artistId.append(artist_id)
}
dispatch_async(dispatch_get_main_queue(), {
self.tableView.reloadData()
return
})
})
}
task.resume()
}
override func viewDidLoad() {
super.viewDidLoad()
getMusicListJSON()
playButton.addTarget(self, action: "playButtonTapped:", forControlEvents: .TouchUpInside)
playerView.frame = CGRectMake(0, 0, self.view.frame.width, self.view.frame.height * 0.7)
playButton.hidden = true
var error: NSError?
var success = AVAudioSession.sharedInstance().setCategory(
AVAudioSessionCategoryPlayAndRecord,withOptions: .DefaultToSpeaker, error: &error)
if !success{
NSLog("Failed to set audio session category, Error: \(error)")
}
}
func playButtonTapped(sender: AnyObject){
// set play image to pause wehen video is paused and also back
if AudioPlayer.rate == 0
{
AudioPlayer.play()
playButton.setImage(UIImage(named:"pause"), forState: UIControlState.Normal)
} else {
AudioPlayer.pause()
playButton.setImage(UIImage(named: "play"), forState: UIControlState.Normal)
}
}
@IBAction func slideOutMenu(sender: AnyObject) {
var appDelegate:AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
appDelegate.centerContainer!.toggleDrawerSide(MMDrawerSide.Left, animated: true, completion: nil)
}
@IBAction func musicMenu(sender: AnyObject) {
var appDelegate:AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
appDelegate.centerContainer!.toggleDrawerSide(MMDrawerSide.Right, animated: true, completion: nil)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
self.navigationController?.navigationBarHidden = true
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return trackName.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("playerCell", forIndexPath: indexPath) as! playerTableViewCell
// Configure the cell...
cell.artistName.text = trackName[indexPath.row]
cell.trackName.text = artistLabel[indexPath.row]
return cell
}
// set the song to play according to the table row selected. Also set the name and artist.
func playSong() {
var playnumber = trackUrl[SelectedSongNumber]
var TrackName = trackName[SelectedSongNumber]
var TrackImage = artWork[SelectedSongNumber]
var TrackDJ = artistLabel[SelectedSongNumber]
var DjId = artistId[SelectedSongNumber]
AudioPlayer = AVPlayer(URL: NSURL(string: playnumber))
AudioPlayer.play()
songName.text = TrackName
trackDjName.text = TrackDJ
load_artwork(TrackImage)
playButton.hidden = false
}
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath){
SelectedSongNumber = indexPath.row
playSong()
}
// set the song artwork to display in the player for the current playing song.
func load_artwork(urlString: String){
var imgURL: NSURL = NSURL(string: urlString)!
let request: NSURLRequest = NSURLRequest(URL: imgURL)
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue(), completionHandler: {(response: NSURLResponse!, data: NSData!,error: NSError!) -> Void in
if error == nil {
self.imageArtwork.image = UIImage(data: data)
}
})
}
}
这是我认为应该是问题原因的两个代码。但到目前为止，我找不到任何方法来传递任何变量，我将需要它来完成我的应用程序。我在这里做错了什么？
我真的可以在这里使用一些帮助来使其正常工作。也许我的导航控制器设置正确。作为第一个视图控制器应该嵌入其中。但我不确定我是否正确地做到了这一点。
谢谢您的帮助。