Does a mobile app designer need to be able to design for the ios/andoroid platform?

Question

Android

When the web finally got on its feet, it became almost mandatory for web designers to know the layout of html / css / js Now mobile development is rapidly gaining momentum. Do you think this will happen here, ie. the designer will not have to give "pictures", but immediately ready layout files, which the programmer will only "revive"?

Answer 1

As a developer, it is convenient for me if the designer knows the technical features of individual elements. For example, I can place a 20x20 px icon for a button on a transparent 40x40 px canvas so that after inserting a small image into the button I don't have to expand the active area manually. It's also nice if the designer has some idea of ​​how autolayout works. Even as an iOS developer, every time I want to kill a designer who draws such borders that scale fractionally on Retina displays.
And about the return to the finished interface file - I think this is superfluous. Firstly, there are purely programming things in the interface file: outlets, tags, runtime attributes. In conditions of accelerated development, when the designer and developer work in parallel for some time, you will simply have to throw out your interface file and set everything up again. Secondly, in my practice, a mixed approach is often used, when some of the elements are loaded from the interface file, and some - from the code.
PS These are, of course, my wishes as a developer, I'm sure the truth is somewhere in the middle :)

Answer 2

you need to know the guidelines and roughly understand how this happens.
with this knowledge, you can make it easier for the programmer to work (observing the naming of layers, etc.)

Answer 3

Rather, no, the designer must know the guides, recommended sizes, understand what dp is, be able to cut for different resolutions, but you are unlikely to typeset. The design of a serious application implies a lot of CustomView, and the programmer makes it. IMHO, the main guides - you will not make up.