This is another style thing, I think. When writing Objective-C I always use spaces because lining things up is idiomatic to the language. Same with Python which

This is another style thing, I think. When writing Objective-C I always use spaces because lining things up is idiomatic to the language. Same with Python which has well-codified rules for many multi-line argument lists and the like. However, beyond that, I don't tend to line up assignments or anything else that has me doing "special indenting", so (at least with my code) this doesn't end up being an issue. If I was working on a project where there was a strong preference for indenting assignments, or any other case like this, I would use spaces throughout.