Know Java & Still don't want to learn ObjectiveC but want to make iOS apps?

Then you want to have a look at this:  https://code.google.com/p/j2objc/

This will not just magically port all of your code from Java into an iOS application - in terms of the UI anyway - however, the majority of your internal code is going to do exactly that.

Of particular note is the JUnit support which strikes me as extremely useful & civilized.