ios - Parse: fatal error: NSArray element failed to match the Swift Array Element type -


i error (fatal error: nsarray element failed match swift array element type) whenever delete items collection view, close app, relaunch app, , go project. i've found similar solutions re-ordered initializers doesn't seem wok me. 

**appdelegate.swift**  func application(application: uiapplication, didfinishlaunchingwithoptions   launchoptions: [nsobject: anyobject]?) -> bool {  // register pfobject subclasses task.registersubclass() task.initialize()  project.registersubclass() project.initialize()  user.registersubclass() user.initialize()   **project.swift**  import uikit import parse  public class project: pfobject, pfsubclassing {    // mark: - public api   @nsmanaged public var projecttitle: string!   @nsmanaged public var owner: user!   @nsmanaged public var tasks: [task]    // mark - required pfsubclassing parse setup   override public class func initialize()   {     struct static {       static var oncetoken: dispatch_once_t = 0     }     dispatch_once(&static.oncetoken) {       task.initialize()       self.registersubclass()     }   }    public static func parseclassname() -> string {     return "project"   }     // mark: conveinience init    init(projecttitle: string, owner: user, tasks: [task])   {     super.init()     self.projecttitle = projecttitle     self.owner = owner     self.tasks = tasks   }    override init() { super.init() }  }   **task.swift** import uikit import parse  public class task: pfobject, pfsubclassing {    // mark: - public api   @nsmanaged public var title: string   @nsmanaged public var ischecked: bool   @nsmanaged public var projectowner: project   @nsmanaged public var category: string   @nsmanaged public var isimportant: bool    // mark - required pfsubclassing parse setup   override public class func initialize()   {     struct static {       static var oncetoken: dispatch_once_t = 0     }     dispatch_once(&static.oncetoken) {       self.registersubclass()     }   }    public static func parseclassname() -> string {     return "task"   }     // mark: conveinience init    // create new project   init(title: string, projectowner: project, ischecked: bool, category: string, isimportant: bool)   {     super.init()     self.title = title     self.projectowner = projectowner     self.ischecked = ischecked     self.category = category     self.isimportant = isimportant   }    override init() { super.init() }     }

the error happens when try use tasks array. load uicollectionview.

here's possibly relevant code grab tasks parse: 

// fetch data parse   func fetchproject() {     let iscurrenttab = navigationcontroller?.tabbaritem.title     let tasksquery = pfquery(classname: task.parseclassname())     tasksquery.wherekey("category", equalto: iscurrenttab!)     tasksquery.wherekey("projectowner", equalto: project)     tasksquery.findobjectsinbackgroundwithblock { (tasks, error) -> void in       if error == nil {         self.project.tasks.removeall()         print(tasks)            task in tasks! {             print(task)             let task = task as! task             self.project.tasks.append(task)           }          self.collectionview?.reloaddata()       } else {         print("\(error?.localizeddescription)")       }     }   }

i'm using xcode 7.1 , parse v1.8.5

any appreciated!

i ended using pointers access tasks array instead of having nested in projects array. way, make of calls directly array , not lose trying go down nested level.


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