What is the difference between using the import command in the. h file and. M file?

YesProgramYou like to write all the import statements in the header of the. h file. Some programmers prefer to write the Import Statement in the header of the. M file.

It doesn't matter where you write it.

Which of the. h file and. M file does not matter if the Import Statement is written?

This is not true.

Generally, I am used to adding all the import statements to the. h file header, but in one case, I can only add the import statements to the. M file to avoid cross-reference errors.

If you do not know what a cross-reference error isArticleIt will tell you: a cross-reference BUG: "can not find interface declaration"

Therefore, I suggest you put the import statements in the same way as I do. in the H file, when the compiler tells you that you cannot find the declaration of a class, but you have already imported the header file of this class, move the Import Statement. M file header.