Porting Android app to iPhone

Requirement is for porting Android app to iPhone

The Android application is developed. Its a very simple Login / Registration application.

The user can register using the mobile and as well as log into the app using user name and password.

We have the android code available :

Skills required are:
Android , iPhone , java, php, JSON, MySql or any other database. xmppframework + objC + cocoa touch, and xml

This is a very small project, upon completion, a larger project is on the way.

I would like to invite only those developer who are willing to work fulltime and have experience with the following skillsets as this is a very high priority one and needs to be completed in 2 days.

There is already database and tables on the database side.
login api which takes request from json are available
android screens such as login and registration screens are available.

All database queries are available.

The only part required to do this job is..

Create the same interface in iPhone/iPad.
Use JSON to connect to login_api that takes cares of user registartion and login.

NOTE**: The project is an on going one. Upon successful completion, a larger project will kick in