Working with Builds, Schemes, and Workspaces - Xcode 4 - page 309

Sharing a scheme means that others can delete it or modify it without your permission.
FIGURE 12.18
Managing multiple schemes
NOTE
Note that the scheme menu displays multiple destinations for each scheme. A destination is a platform—or more
technically, an SDK. For example, an iOS scheme can select an iOS device, the iPhone Simulator, or the iPad Sim-
ulator as a destination. Destinations aren't stored or selected in a scheme, and you'll see that every scheme gives
you the same platform choices. Typically, you select a scheme, then you select an SDK, and finally you select a
build action, to create a build for that SDK.
Summary
This chapter introduced the Xcode build system. It outlined the relationship between workspaces, projects, tar-
gets, build actions, and schemes. It introduced build options and build settings, and it illustrated how settings
are prioritized and how you can modify them in the build editor.
Next, it explained how build configurations define project-wide containers for a certain subset of build settings.