Xcode Project Infrastructure

2. XCODE PROJECT
INFRASTRUCTURE
The lecture that will make you cry!

3. AGENDA
Projects / Workspaces
Targets
Schemes
Build Settings
Code Signing
Entitlements.plist
Info.plist

4. PROJECTS /
WORKSPACES

5. WORKSPACES / PROJECTS
Workspace
Project1.
xcodeproj
Project2.
xcodeproj
App Target
Test Target
Framework Target
Documentation
Target

6. PROJECTS
Collection of source code and resource
files, structured into groups
Collection of targets
Provides project wide build settings

7. TARGETS

8. TARGETS

9. TARGETS
Targets define how an individual product is
built
Products can be executables, frameworks,
test suites, etc.
Targets can provide specific build settings

10. SCHEMES

11. SCHEMES

12. SCHEMES
“An Xcode scheme defines a collection of
targets to build, a configuration to use when
building, and a collection of tests to
execute.”
- Xcode Concepts Documentation

13. BUILD SETTINGS

14. BUILD SETTINGS

15. BUILD SETTINGS
Project provides build settings that apply to all
targets
Target can override build settings
Build settings parameterize how product is
built, e.g. which SDK version is used, which
provisioning profile, etc.

16. CODE SIGNING

17. SIGNING
App
Provisioning
Profile
CertificatePrivate Key
Code Signinghash
Signature App
Signed App
Public Key

18. VERIFICATION
App hash
Signature
Public Key
Decrypted
hash
Decrypt
= Valid App

19. CODE SIGNING
Ensures identity of developer of an
application
Ensures integrity of application content (has
not been manipulated after submission to
App Store)

20. CODE SIGNING
Developer signs with developer profile
when submitting to App Store
Apple resigns application with their own
certificate before distributing to users
Apple’s certificate doesn’t expire!

21. CODE SIGNING
Certificate: Public Key + Identifying
information
Provisioning Profile: Combination of
entitlements, certificate and list of viable
devices

22. CERTIFICATE

23. ENTITLEMENTS.PLIST

24. ENTITLEMENTS.PLIST /
CAPABILITIES

25. ENTITLEMENTS /
CAPABILITIES
Defines which privileges an app has (e.g.
access to iCloud)
App’s privileges need to match the ones in
corresponding provisioning profile

26. CODE SIGNING SUMMARY
Entitlements define what app is allowed to do
Entitlements need to be specified in Provisioning Profile
Provisioning Profiles specifies with which Certificates an
app can be signed
Code signing ensures that app developer can be
identified and that app content isn’t modified after
signing

27. INFO.PLIST

28. INFO.PLIST
Defines target specific settings that aren’t
related to build process:
Product version, Product name, Initial
Storyboard File, etc.

29. ADDITIONAL RESOURCES

30. ADDITIONAL RESOURCES
Apple Documentation: Xcode Concepts
Apple Documentation: About Information Property List
Files
Apple Documentation: Adding Capabilities
Apple Documentation: Code Signing Guide
Objc.io: Inside Code Signing