The document discusses various techniques for optimizing and maintaining Xcode projects, including using asset catalogs to improve compile times, cleaning out unused code and assets to create leaner apps, using compiler flags and warnings to identify issues, and leveraging dependency management tools like CocoaPods.

1. Optimize and maintain
your project in Xcode.
A presentation by Bryn Bodayle

2. What is optimal?
Quick compile times
Easy maintenance
Avoiding crashes
Fast and lean apps

3. We will cover.
Compile time optimization
Compiler warnings and errors
Dependency management

4. Optimize compile time.
Use and eliminate warnings
Use asset catalogs
Clean out the garage

5. Use asset catalogs.
Migration tool is provided
Easy management and configuration
Compiles assets into binary format
Supports slicing in Xcode 7

6. Clean out the Garage
Extract IPA to check
Remove unused code and libraries
Remove unused assets

7. Use and eliminate warnings.
Use lots of compiler flags
Disable at a small scale
Order of compiler flags matters
Fix every warning

8. Use these compiler flags.
-Wall
-Wextra
-Werror
-Wconversion
-Wundef
-Wdeprecated-implementations
-Wno-unused-parameter
-Wfloat-equal
-Wimplicit-retain-self
-Wnewline-eof
-Wshadow
-Wsign-compare
For reference: http://f***ingclangwarnings.com

9. 1. Disable inline.
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
[self performSelector:selector];
#pragma clang diagnostic pop

10. 2. Disable per file.

11. 3. Disable project-wide.

12. Order of compiler flags matters.

13. Fix every warning.

14. Use CocoaPods.
Stop it with submodules
Promotes healthy reuse
Easy version management

15. Questions?

16. Credits
Stopwatch by Edward Boatman from the Noun Project
Presenter by Björn Andersson from the Noun Project
Garage by Lloyd Humphreys from the Noun Project