ios Swift fatal error: use of unimplemented initializer 'init()'

Question

I've been trying very hard, have looked up every similar question pertaining to this issue on StackOverflow and trying them to no avail.

class TimeLineTableViewController:      UITableViewController,        UIImagePickerControllerDelegate,     UINavigationControllerDelegate  {          var timelineData = [PFObject]()               required init(coder aDecoder: NSCoder) {         super.init(coder: aDecoder)     }          override func viewDidLoad() {         super.viewDidLoad()         self.loadData()          }      @IBAction func loadData(){        timelineData.removeAll(keepCapacity: false)                 var findTimelineData:PFQuery = PFQuery(className:"timelineMessages")        findTimelineData.findObjectsInBackgroundWithBlock { (objects:[AnyObject]! , error:NSError!) -> Void in             if error == nil {                 self.timelineData = objects.reverse() as [PFObject]                 //let array:NSArray = self.timelineData.reverseObjectEnumerator().allObjects                 // self.timelineData = array as NSMutableArray                 self.tableView.reloadData()             }         }     }      override func viewDidAppear(animated: Bool) {         var footerView:UIView = UIView(frame: CGRectMake(0, 0, self.view.frame.size.width, 50))         self.tableView.tableFooterView = footerView                  var logoutButton:UIButton = UIButton.buttonWithType(UIButtonType.System) as UIButton         logoutButton.frame = CGRectMake(20, 10, 50, 20)         logoutButton.setTitle("Logout", forState: UIControlState.Normal)         logoutButton.addTarget(self, action:"logout:", forControlEvents: UIControlEvents.TouchUpInside)                  footerView.addSubview(logoutButton)     }  

To clarify, timelineTableViewController has one class that inherits, MessageTableCell. It's also part of a project that I've integrated into Objective-C code, so it's a combination of both Swift and ObjC. I've run both projects (the swift one and the ObjC one) independently and they work fine; it's only when I try to run it together do they mess up. Any suggestions? I'm at an utter loss for this.

Answer 1

“Unlike subclasses in Objective-C, Swift subclasses do not inherit their superclass initializers by default.”

Automatic Initializer Inheritance

• Rule 1: If your subclass doesn’t define any designated initializers, it automatically inherits all of its superclass designated initializers.
• Rule 2: If your subclass provides an implementation of all of its superclass designated initializers—either by inheriting them as per rule 1, or by providing a custom implementation as part of its definition—then it automatically inherits all of the superclass convenience initializers.

Excerpt From: Apple Inc. “The Swift Programming Language.” iBooks. https://itun.es/tw/jEUH0.l

Since you have override the init(coder aDecoder: NSCoder), TimeLineTableViewController won't have the init() initiailzer.

You can provide an implementation of all of its superclass designated initialisers like this

override init() {         super.init() }  override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: NSBundle?) {         super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil) }  required init(coder aDecoder: NSCoder) {         super.init(coder: aDecoder) } 

, or just delete the implementation of init(coder aDecoder: NSCoder).