Is it acceptable to create multiple classes in one .swift file, or should I create a separate .swift file for each class?

Question

Is it considered poor technique to create multiple classes in one swift file, or is it best to create a separate swift file for each class?

Answer 1

Short answer: it depends.

Long answer:
If you have small short classes that are strongly binded together, it's correct to put the in the same file.
If you have long, unrelated classes, then you better put them in different files.