New Features in Xcode 4.5
Xcode 4.5 adds support for development with iOS 6 SDK and includes these additional features:
LLDB is now the default debugger.
LLDB supports hardware watchpoints on iOS devices.
OpenGL debugging and performance analysis for iOS apps is integrated into Xcode.
Auto Layout is supported for iOS 6.
Xcode 4.5 also extends new features released in Xcode 4.4 as listed below:
Improved localization workflow using base language
.xibfiles now supports OS X 10.8 in addition to iOS Storyboards.
Objective-C literals syntax in
NSDictionaryclasses are supported for iOS.
Support for subscripting using
'[ ]'syntax with
NSArrayare supported and deploy back to iOS 5.
Compatibility with the C++11 standard is improved with added support for lambda expressions.
For full details of Objective-C language feature availability, tools, and deployment capability, see Objective-C Feature Availability Index.