Xcode allows to integrate third party API reference documentation. That way, you will get information about Sparrow's classes, methods and properties directly while you write your code. The Sparrow docset is located here:
- Xcode 4: open up the Xcode preferences and enter the Documentation tab. Add the link provided above as a "publisher".
- Xcode 5: use the free Docs for Xcode application to manage your docsets. When installed, add the link from above as a feed.
Now you can get information about Sparrow classes and methods with the Alt single-click on symbol shortcut.