Is @2x still relevant for retina displays?

Question

iOS

Actually a subject. I am interested in the question because I am studying in the old courses, and in the new xcode there are no files with the same name in the project files, unlike the examples in the course.

Answer 1

Actual, but not fashionable
Now the trend is to use the catalog for art - Asset Catalog. This is a special container that allows you to avoid these wildest crutches with suffixes and present all your pictures in a convenient way. But there are situations when the asset catalog will not work. In my practice, I have come across only two scenarios:
1) Mask;
2) Localization;
then you can't do without these @2x and @3x. Moreover, everything is going to the fact that @2x will soon become the standard. In iPhone applications, non-retina images are no longer used, next year it will affect iPads ...
PS oh, I forgot. Now trendy vector and plane interfaces

Answer 2

The new Xcode itself is responsible for all this - you can not specify.

Answer 3

I think you should try using AutoLayout.