Completed README with iOS notes.

Author: msaelices

Diff for: README.md

@@ -3,13 +3,22 @@ This project uses Appium to test Vue UI components, and also serves as a source
 component screenshots at [nativescript-vue.org](https://nativescript-vue.org/).
 
 ## System requirements
+
 * Node 7.6 or higher (for async function support).
 * The [Appium](http://appium.io/) client. Just download and install the latest [from GitHub](https://github.com/appium/appium-desktop/releases/latest) or execute the following command:
 
 ```bash
 npm install -g appium
 ```
 
+### iOS requirements
+
+* Carthage:
+
+```bash
+brew install carthage
+````
+
 ## Running the tests locally
 
 Start Appium, which is
@@ -21,7 +30,7 @@ Otherwise you'll receive an error `127.0.0.1:4723` can't be reached.
 
 ### Android
 
-Edit the `appium.capabilities.json` config file, in the `android23`, with your device/emulators parameters, probably only the `avd` or `deviceName` parameters would be enough.
+Edit the `appium.capabilities.json` config file, in the `android23` section, with your device/emulators parameters, probably only the `avd` or `deviceName` parameters would be enough.
 
 Start the tests:
 
@@ -33,7 +42,20 @@ npm run android.screenshots
 
 ### iOS
 
+Edit the `appium.capabilities.json` config file, in the `ios-simulator103iPhone6` section, with your device/emulators parameters.
+
+Build the iOS app
+
 ```bash
 npm run ios.build
+```
+
+Start `XCode` and open the `platforms/ios/nativescriptvueuitests.xcodeproj` file.
+
+Run the app on the emulator. This is needed in order to have the app installed.
+
+Run the tests:
+
+```bash
 npm run ios.screenshots
 ```