How to find unused code in Xcode 7?

Question

I have seen this question, but the answer doesn't seem to be valid in Xcode 7. At least I can't find it.

Can anyone tell me where can I tell the compiler to notify me about unused functions/parameters/values ?

ofcourse compiler will warn you for the unused variable. I am not sure about the unused methods!! — Teja Nandamuri, Feb 05 '16 at 21:28

score 76 · Accepted Answer · edited Jan 10 '17 at 16:41

76

Xcode has a number of settings you can enable to warn you about things like unused functions, parameters, and values.

You can also easily enable strict warnings by setting your Other Warning Flags to -Wall -Wextra -Weverything.

Another option for detecting unused code is by using Code Coverage.

edited Jan 10 '17 at 16:41

David Lari

answered Feb 05 '16 at 22:19

1

your link is broken : "Sorry, that page cannot be found" – Zaporozhchenko Oleksandr Nov 28 '16 at 15:30
@Aleksandr https://developer.apple.com/library/content/documentation/DeveloperTools/Conceptual/testing_with_xcode/chapters/07-code_coverage.html – original_username Dec 10 '16 at 18:05
32

this is Wawesome – ugur Sep 24 '17 at 13:08
could you clarify the ``-Wall -Wextra -Weverything``. when i try to add it as other nothing changes really? thanks – Irfan Nov 20 '17 at 14:23
32

From my experience these settings do nothing. I just added `func test() { }`, built the project and got no warning about unused function – Andrey Gordeev May 03 '18 at 13:52
2

@AndreyGordeev I think it only works for Objective-C code, based on this forum post: https://forums.macrumors.com/threads/xcode-how-to-find-dead-unused-swift-code.2083604/#post-25454328 – bluegreen Aug 28 '18 at 21:42

score 12 · Answer 2 · answered Feb 09 '18 at 09:42

12

In left side select Project and in Build Settings

Unused functions, parameters, and values

Other Warning Flags to -Wall -Wextra -Weverything

answered Feb 09 '18 at 09:42

Vinoth Anandan

score 8 · Answer 3 · answered Aug 27 '18 at 17:48

8

To check the unused functions and variables you can also use the following scripts-

https://github.com/PaulTaykalo/swift-scripts

answered Aug 27 '18 at 17:48

Anindya

Does this still work? Doesn't look like the script is being maintained. – acmpo6ou Jul 15 '23 at 10:46

Keshu R. · Answer 4 · 2023-06-06T09:54:54.707

2

2022 Update | Swift

Those who are looking for a way to remove unused code from Swift project, it can be done easily using Periphery.

Periphery is a tool to remove unused code from Swift projects. It can detect unused function, struct, class, protocols etc.

Its very easy to use. You can get step by step guide here :

edited Jun 06 '23 at 09:54

answered Oct 13 '22 at 05:01

Keshu R.

1

That link is dead. Here is a good article on periphery: https://medium.com/@mshcheglov/unused-code-cleanup-in-ios-projects-9789e5d247ca – Sentry.co May 28 '23 at 15:29
1

@Sentry.co thanks. updated the link – Keshu R. Jun 06 '23 at 09:55

wzso · Answer 5 · 2021-02-23T03:53:25.040

1

For those who are seeking a solution for Objective-C codebase like me, try this script by @nst. It analyzes the mach-o files.

edited Feb 23 '21 at 03:53

answered Feb 23 '21 at 03:36

wzso

5 Answers5