Ambiguous reference to member tableview number rows in section - swift

Question

I'm loading some data from a web server and I'm getting ambiguous reference to member tableview numberOfRowsInSection? Below is my swift file. What am i missing here?
TableViewController.swift
import UIKit
class TableViewController: UITableViewController {
var viewModel:ViewModel!
override func viewDidLoad() {
super.viewDidLoad()
self.viewModel = ViewModel()
self.tableView.delegate = viewModel
self.tableView.dataSource = viewModel
self.tableView.registerNib(UINib(nibName: "TableViewCell", bundle: NSBundle.mainBundle()), forCellReuseIdentifier: tableViewCellIdentifier)
self.tableView.rowHeight = UITableViewAutomaticDimension
self.tableView.estimatedRowHeight = 50;
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
ViewModel.swift
import UIKit
class ViewModel: NSObject,UITableViewDelegate, UITableViewDataSource, UICollectionViewDelegate, UICollectionViewDataSource {
var dataArrayPosts: NSArray!
var posts:[Post] = []
override init() {
super.init()
let myURL = NSURL(string: "mydomainURLhere");
let requestPosts = NSMutableURLRequest(URL: myURL!);
requestPosts.HTTPMethod = "POST";
let postStringVars = ""
requestPosts.HTTPBody = postStringVars.dataUsingEncoding(NSUTF8StringEncoding);
let taskPosts = NSURLSession.sharedSession().dataTaskWithRequest(requestPosts){ data, response, error in
if error != nil{
print("error\(error)");
return;
}
do {
if let json = try NSJSONSerialization.JSONObjectWithData(data!, options: []) as? NSDictionary {
//print(json)
if let category = json["Posts"] as? NSMutableArray{
//print(category)
_ = category
self.dataArrayPosts = json["Posts"] as! NSMutableArray;
dispatch_async(dispatch_get_main_queue()) {
self.posts.removeAll()
for item in self.dataArrayPosts {
let post = Post(postDesc: (item["postDesc"] as? String)!,imageName: (item["imageName"] as? String)!,bName: (item["bName"] as? String)!,postDate: (item["postDate"] as? String)!,postShowsUntil:(item["postShowsUntil"] as? String)!)
self.posts.append(post)
// Ambiguous on reloadData???????
self.tableView.reloadData()
}
}
}else{
dispatch_async(dispatch_get_main_queue()) {
print("Nothing Was Found")
}
}
}
} catch let error as NSError {
print(error.localizedDescription)
}
}
taskPosts.resume()
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return posts.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier(tableViewCellIdentifier, forIndexPath: indexPath) as! TableViewCell
let post = posts[indexPath.row]
cell.quoteTextLabel.text = post.postDesc
cell.nameLabel.text = post.bName
if let imageName = post.imageName where !imageName.isEmpty{
cell.photoView?.image = UIImage(named: imageName)
cell.photoWidthConstraint.constant = kDefaultPhotoWidth
cell.photoRightMarginConstraint.constant = kDefaultPhotoRightMargin
}
else {
cell.photoView?.image = nil
cell.photoWidthConstraint.constant = 0
cell.photoRightMarginConstraint.constant = 0
}
cell.contentView.setNeedsLayout()
cell.contentView.layoutIfNeeded()
return cell
}
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return posts.count
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(collectionViewCellIdentifier, forIndexPath: indexPath) as! CollectionViewCell
return cell
}
}

Answer 1

None of the things that ViewModel inherits from expose a tableView property, your ViewModel needs a reference to your UITableViewController. As the ViewController owns the ViewModel it should be a weak reference, something like the following
class ViewModel: NSObject,UITableViewDelegate, UITableViewDataSource, UICollectionViewDelegate, UICollectionViewDataSource {
weak let tableViewController:UITableViewController
var dataArrayPosts: NSArray!
var posts:[Post] = []
override init(controller:UITableViewController) {
self.tableViewController = controller
super.init()
// ...
self.tableViewController.tableView.reloadData()
}
class TableViewController: UITableViewController {
var viewModel:ViewModel!
override func viewDidLoad() {
super.viewDidLoad()
self.viewModel = ViewModel(controller:self)
// ...
}