I am an experienced web developer and want to move to full time ios development. At the moment my skillset comprises of php, javascript and MySQL.

I am doing video tutorial course on ios development (lynda.com) at the moment with a motive to be able to develop ios apps that deliver basic things like keeping a track of monthly budget.

My question is - What do I need to know to be able to start full time app development? Is objective C going to be enough or do I have to learn C++ also?

I would highly appreciate your response to the questions I have.