Testing from iOS app through PHP API to database

I am developing an iOS app, which stores data that the user enters in the app through an API written in PHP (using the Yii framework) in a database on a server. It works, however, I don't have any test code. I am looking into the best way to test this kind of program stack, but I cannot see the wood for the trees.

1. For unit testing the PHP API, I am looking into PHPUnit, which seems to be the de facto standard for PHP. Is there a standard for unit testing iOS code?


2. What would be the best way to create an integration test case, in which I specify certain behavior in the app, and check if the data ends up correctly in the database?