haldun · March 3, 2016 18:51 · Mar 3, 2016
diff --git a/RootViewController.swift b/RootViewController.swift
@@ -0,0 +1,93 @@
+//
+//  RootViewController.swift
+//  Filters
+//
+//  Created by Haldun Bayhantopcu on 03/03/16.
+//  Copyright © 2016 Haldun Bayhantopcu. All rights reserved.
+//
+
+import UIKit
+
+struct Filter {
+  let key: String
+  let value: String?
+}
+
+extension Filter: Equatable {}
+
+func ==(lhs: Filter, rhs: Filter) -> Bool {
+  return lhs.key == rhs.key
+}
+
+final class RootViewController: UITableViewController {
+
+  var filters = [
+    Filter(key: "filter 1", value: nil),
+    Filter(key: "filter 2", value: "hehehehe"),
+  ]
+
+  override func viewDidLoad() {
+    super.viewDidLoad()
+  }
+
+  override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+    return filters.count
+  }
+
+  override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
+    let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath)
+    let filter = filters[indexPath.row]
+    cell.textLabel?.text = filter.key
+    cell.detailTextLabel?.text = filter.value
+    return cell
+  }
+
+  override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
+    let filter = filters[indexPath.row]
+    let filterViewController = FilterViewController(filter: filter)
+    filterViewController.delegate = self
+    showViewController(filterViewController, sender: self)
+  }
+}
+
+extension RootViewController: FilterViewControllerDelegate {
+  func filterChanged(filter: Filter) {
+    navigationController?.popViewControllerAnimated(true)
+    print("filter changed: \(filter)")
+
+    if let index = filters.indexOf(filter) {
+      filters[index] = filter
+      tableView.reloadRowsAtIndexPaths([NSIndexPath(forRow: index, inSection: 0)], withRowAnimation: .Automatic)
+    }
+  }
+}
+
+protocol FilterViewControllerDelegate: class {
+  func filterChanged(filter: Filter)
+}
+
+class FilterViewController: UIViewController {
+
+  let filter: Filter
+
+  weak var delegate: FilterViewControllerDelegate?
+
+  init(filter: Filter) {
+    self.filter = filter
+    super.init(nibName: nil, bundle: nil)
+  }
+
+  required init?(coder aDecoder: NSCoder) {
+      fatalError("init(coder:) has not been implemented")
+  }
+
+  override func viewDidLoad() {
+    super.viewDidLoad()
+    view.backgroundColor = UIColor.whiteColor()
+    view.addGestureRecognizer(UITapGestureRecognizer(target: self, action: "tapped:"))
+  }
+
+  func tapped(sender: AnyObject?) {
+    delegate?.filterChanged(Filter(key: filter.key, value: "new value!"))
+  }
+}