completed the restructure for the GitBook #18

SUMMARY.md

@@ -0,0 +1,20 @@
+# Summary
+* [Introduction](README.md)
+* [Basics of Swift](basics-of-swift/README.md)
+  * [Variables & Constants](basics-of-swift/const-vars-operations.md)
+  * [Arrays](basics-of-swift/arrays.md)
+  * [Control Flow & Conditionals](basics-of-swift/control-flow-conditional.md)
+  * [Optionals](basics-of-swift/optionals.md)
+  * [Functions & Tuples](basics-of-swift/functions-tuples)
+  * [Closures](basics-of-swift/closures.md)
+* [Setup](setup/README.md)
+  * [Familiarity with Xcode](setup/familiarity-with-xcode.md)
+  * [Project Setup](setup/project-setup.md)
+* [Tutorials](tutorials/README.md)
+  * [Apple Watch](tutorials/apple-watch/README.md)
+  * [iPhone](tutorials/iphone/README.md)
+    * [Calculator](tutorials/iphone/build-a-calculator)
+    * [FoodTracker](tutorials/iphone/food-tracker)
+  * [iPhone + Apple Watch App](tutorials/iphone-apple-watch/README.md)
+    * [Interaction App](tutorials/iphone-apple-watch/interaction-app.md)
+* [Resources](resources)

resources/README.md

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+# Resources
+
+A list of resources that are required for some of the tutorials
+
+* Basics of Swift
+* Interaction App (version-0.1)

resources/version-0.1/v0.1/ViewController.swift

@@ -23,8 +23,6 @@ class ViewController: UIViewController, WCSessionDelegate {
         // Dummy Implementation
     }
 
-    @IBOutlet weak var clickedLabel: UILabel!
-
     fileprivate let session: WCSession? = WCSession.isSupported() ? WCSession.default() : nil
 
     required init?(coder aDecoder: NSCoder) {
@@ -43,6 +41,7 @@ class ViewController: UIViewController, WCSessionDelegate {
         }
     }
 
+
     override func viewDidLoad() {
         super.viewDidLoad()
         // Do any additional setup after loading the view, typically from a nib.
@@ -54,6 +53,7 @@ class ViewController: UIViewController, WCSessionDelegate {
         // Dispose of any resources that can be recreated.
     }
 
+    @IBOutlet weak var clickedLabel: UILabel!
     @IBAction func phoneButtonClicked(_ sender: UIButton) {
         self.clickedLabel.text = "Phone Click"
         print("clicked on Phone")

tutorials/README.md

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+# Tutorials
+
+You've finally arrived at the tutorials section!
+
+We've split this section up by categories:
+* Apple Watch
+* iPhone
+* iPhone + Apple Watch
+
+Each contains tutorials that will guide you through some of the basics that you'll require to get off the ground with building your very first Swift App! 

tutorials/apple-watch/README.md

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+# Apple Watch
+
+Here you'll find a list of Apple watch tutorials.
+
+* [Hello World](https://github.com/dwyl/learn-apple-watch-development/issues/11)

tutorials/iphone-apple-watch/interaction-app.md

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+# Interactivity between an iPhone & Apple Watch
+
+Now that we've build a few stand alone apps for both the iPhone and Apple Watch, <br>
+It's time to build 👷‍ something that will work on both devices!
+
+Our first step would be to go about understanding how to connect iPhone to an Apple <br>
+Watch, enter:
+### [WatchConnectivity Framework](https://developer.apple.com/reference/watchconnectivity)
+**Used to connect and relay messages in both directions between the two devices**
+
+We'll be using the [classes](https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/ClassesAndStructures.html) and [protocol](https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/Protocols.html) provided by this framework to create a connection in our app.
+
+#### Setup
+
+##### Project
+Create a Project (iOS App with WatchKit App)
+<img width="758" alt="screen shot 2016-12-05 at 17 27 45" src="https://cloud.githubusercontent.com/assets/2305591/20895155/2a98e8fa-bb10-11e6-8b6d-3e87251dd93f.png">
+
+##### Watch
+Create a Button (style it as you wish) and connect it to the controller as an action
+
+<img width="216" alt="screen shot 2016-12-05 at 17 31 54" src="https://cloud.githubusercontent.com/assets/2305591/20895335/ee359e2a-bb10-11e6-9d5d-19b254978982.png">
+
+```js
+@IBAction func buttonClicked() {
+    print("Button Clicked!")
+}
+```
+
+Next we need to use the WatchConnectivity framework to setup the Watch to be able to send and receive requests from the phone.
+
+Firstly lets import `WatchConnectivity` and require it in the controller class
+
+```js
+import WatchConnectivity
+
+class InterfaceController: WKInterfaceController, WCSessionDelegate {
+
+public func session(_ session: WCSession, activationDidCompleteWith
+  activationState: WCSessionActivationState, error: Error?) {
+  // leave empty
+ }
+
+ //rest of code
+}
+
+```
+
+As you can see above, we have a required method called `activationDidCompleteWith:error`, This is called when the activation of a method finishes
+
+
+Next lets **activate** and **initialise** the `WCSession` that will establish a connection between the two devices
+
+```js
+// if WCSession is supported then create a default session
+fileprivate let session: WCSession? = WCSession.isSupported() ? WCSession.default() : nil
+
+// activate the optional session?
+override init() {
+    super.init()
+
+    session?.delegate = self
+    session?.activate()
+}
+```
+
+Lets send the message off to the phone, to do so, we need to go back to the buttonClick action and send the message. **sendMessage is one of the ways to transfer information from the watch to the phone**
+
+
+```js
+// INSIDE buttonClick Action
+let applicationData = ["counterValue" : 1]
+
+// The paired iPhone has to be connected via Bluetooth.
+if let session = session, session.isReachable {
+    session.sendMessage(applicationData,
+                        replyHandler: { replyData in
+                            // handle reply from iPhone app here
+                            print(replyData)
+    }, errorHandler: { error in
+        // catch any errors here
+        print(error)
+    })
+} else {
+    // when the iPhone is not connected via Bluetooth
+}
+```
+
+##### Phone
+
+The setup on the watch is pretty much complete, so lets move onto the phone.
+
+Create some Labels and a button, also connect the button and one of the labels up to the controller so that if a user touches the button, then the text on the label will change to `phone click`
+
+![screen shot 2016-12-06 at 11 56 15](https://cloud.githubusercontent.com/assets/2305591/20924731/088e19d8-bbab-11e6-9514-d769c33e9492.png)
+
+I've connected up my button and the label that says "No"
+```js
+@IBOutlet weak var clickedLabel: UILabel!
+
+@IBAction func phoneButtonClicked(_ sender: UIButton) {
+     self.clickedLabel.text = "Phone Click"
+     print("clicked on Phone")
+
+ }
+```
+
+Now lets create the `WCSession` on the watch so that the two devices can interact with each other
+```js
+import WatchConnectivity
+
+class ViewController: UIViewController, WCSessionDelegate {
+
+  public func sessionDidDeactivate(_ session: WCSession) {
+      // Code
+  }
+  public func sessionDidBecomeInactive(_ session: WCSession) {
+      // Code
+  }
+  public func session(_ session: WCSession, activationDidCompleteWith activationState: WCSessionActivationState, error: Error?) {
+      // Dummy Implementation
+  }
+
+  // if WCSession is supported then create a default session
+  fileprivate let session: WCSession? = WCSession.isSupported() ? WCSession.default() : nil
+
+  // activate the optional session?
+  required init?(coder aDecoder: NSCoder) {
+      super.init(coder: aDecoder)
+
+      session?.delegate = self
+      session?.activate()
+  }
+
+//Rest of the code
+}
+```
+You'll notice a couple more required methods in the phones controller.
+
+Now lets write the method that will receive the message that has been sent by the Watch
+```js
+func session(_ session: WCSession, didReceiveMessage message: [String : Any], replyHandler: @escaping ([String : Any]) -> Void) {
+
+    DispatchQueue.main.async {
+        print("Yes")
+        self.clickedLabel.text = "Watch Click"
+    }
+}
+```
+
+And that should be it! If we run the simulator for both the iPhone and Apple Watch, you should be able to see it all working as expected.
+![ezgif com-video-to-gif](https://cloud.githubusercontent.com/assets/2305591/20884261/048bc14c-bae2-11e6-8ae5-11afe232ed25.gif)
+
+***
+
+**Hint**  
+If you are unable to get both the simulators working then Change the active scheme from just app to apple watch app + phone app as seen below
+<img width="643" alt="screen shot 2016-12-02 at 17 58 19" src="https://cloud.githubusercontent.com/assets/2305591/20844701/04126ac0-b8b9-11e6-9762-c2ba92381528.png">  
+**Hint**

tutorials/iphone/README.md

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+# iPhone
+
+Here you'll find a list of iPhone tutorials.
+
+* [Calculator](/build-a-calculator.md)
+* [FoodTracker](/food-tracker.md)