Major Changes in Xcode 4

Major Changes in Xcode 4

• Workflow
  The Default, Compact, and All-in-One layouts have been replaced by a single Xcode window layout that accommodates everything from a single source file to a multiple interrelated project workspace. Source files, Xcode projects, Interface Builder xibs & nibs, data models, and other files are viewed and edited in the Editor area of the window.
  The left side of the Xcode 4 window shows one of several navigators. The project aviator contains a list of files or projects, and functions like the Groups and Files tree of an Xcode 3.2 project. Other navigators show lists of project symbols; current issues, such as build errors and warnings; results of cross-file Find operations; logs from operations such as building, debugging, or SCM transactions; current breakpoints set in code; or the debug information for the current process. You select an item from the navigator to show its contents for viewing or editing in the Editor.
  Most navigators have a Filter area at the bottom of the navigator that lets you narrow down the contents it displays. This resembles the function of the Filter field in Xcode 3.2’s Detail view. In the project navigator, additional scope buttons allow you to show only recently–accessed files, only currently–modified files, or only files that have interesting SCM status.
  A Utility area on the right shows information about items selected in the navigator or current editor. The top portion of the Utility area features inspectors for the selected item in the navigator or editor. There may be several separate inspectors. The leftmost one usually shows the information about the selected file, while others may show information about the selection within that file. At the bottom of the Utility area is a Library with parts that can be added to a project or file, including file templates, text macros, Interface Builder objects, and media files.
  The navigator and utility areas are opened with the editor in the middle or closed to allow the editor to occupy the entire window.
  The Xcode window supports window tabs, which span the navigator, editor, and Utility areas. Create new tabs for editing different files, or have separate tabs for file navigation, searching, and debugging if you choose.
  You can show multiple editors at the same time, stacked vertically or horizontally. The Assistant editor automatically associates the contents of two editors; for example, the Assistant editor can always show the header file when editing a source file or the source files when browsing through a build log.
  The same project or workspace can be open in multiple windows simultaneously.