Apple Releases Xcode 4 Developer Preview 2

Apple has released the second preview of Xcode 4 to developers for both Mac and iOS development.

The release requires Mac OS X 10.6 Snow Leopard, and includes the iOS SDK 4, to develop apps for Mac, iPhone, and iPad.

What's New:
• Xcode 4 has a brand new, single window interface for all major workflows
• Interface Builder is now integrated within the main Xcode IDE
• Assistant shows a paired editor with complementary files (headers, UI controllers, etc.)
• Fix-it highlights code where an error is detected. as you type, and can even fix it for you
• Version editor shows a live comparison through SCM history, using Git or Subversion
• LLVM compiler 2.0 includes full support for C, Objective-C, and now C++
• LLDB debugger is faster, and uses less memory than the GDB debugging engine
- see notes below on how to enable the LLVM compiler or LLDB debugger
• Instruments adds System Trace, and new iOS instruments including OpenGL ES


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