Update an existing iOS application

Hi Developers , I need help in updating an existing IOS app which will allow Facebook login and invites I want all the below features in it: Feature 1 The application currently uses its own login and registration forms that will be removed. Feature 2 The application currently calls URLs to access and store user data. Login will now be optional allowing usage of the application without logging in. To facilitate this, a unique device ID shall be passed in all posts to URLs. Feature 3 Optionally, users may authenticate with Facebook. When the user has not authenticated with Facebook. A Login with Facebook button will be displayed. Feature 4 Login with Facebook-ios-sdk. Retrieve and locally store the users Facebook id. The optional Facebook ID shall now be passed in all posts to URLs along with the device ID. Feature 5 Replace the applications current logout functionality with a Facebook Logout. Feature 6 Replace the applications current Friend Request function with the Facebook Dialog Requests function. This is also available in the Facebook-ios-sdk. Feature 7 Retrieve the Users Name, and Avatar Image from graph API. This information will be passed in to and existing post to a URL. Pr-requisites: All server side development is already completed or will be completed for you. All IOS application source will be made available to you at the beginning of the project. All development will be done in objective C. So if you think you can comply with the above statements and find an excellent solution then please bid The budget for this project is non-negotiable and it will not be more than 250 USD OK Happy Bidding and ALL the BEST