Xcode provides everything developers need to create great applications for Mac, iPhone, and iPad. Xcode 4 has been streamlined to help you write better apps. It has unified user interface design, coding, testing, and debugging all within a single window. The Xcode IDE analyzes the details of your project to identify mistakes in both syntax and logic, it can even help fix your code for you.
Xcode runs on OS X Mountain Lion and OS X Lion, and includes the Xcode IDE, Instruments, iOS Simulator, the latest Mac OS X and iOS SDKs, and hundreds of powerful features:
Innovative tools to help you create great apps
Interface Builder is fully integrated as a design canvas within the Xcode IDE
The Assistant shows files related to what you're editing, such as the header, superclass, or controller
The Version editor shows a live source code comparison through Git or Subversion history
Live Issues display errors as you type, and Fix-it can correct the mistakes for you
Apple LLVM compiler is embedded within the IDE with support for Objective-C, C, and C++
The new LLDB debugging engine is faster and more memory-efficient than GDB
Instruments adds System Trace and new iOS instruments including OpenGL ES
Streamlined interface that is faster and easier to use
Design your interface side by side with the backing source code
Create connections from your GUI design directly to the related source code
Use tabs to organize your workspace, or double-click to open files in a new window
Schemes let you customize exactly how your app will build, run, profile, and deploy
Debugging and console views slide in without disturbing your place in the editor
Professional editor keeps you focused on your code
Click the Jump Bar at the top of the editor to instantly go to another file
View message bubbles to see errors, warnings, and other issues right beside the code
Use the ribbon on the left of the editor to fold your code, or highlight scope
Embedded Apple LLVM technology finds and fixes bugs for you
Analyzer travels countless code paths looking for logical errors before they become bugs
Live Issues underlines coding mistakes as you type with no need to build first
Fix-it can confidently correct mistakes for you with just a keystroke
Code completion for Objective-C, C, and C++ is incredibly fast and accurate
Instruments for visual performance analysis
Compare CPU, disk, memory, and OpenGL performance as graphical tracks over time
Identify performance bottlenecks then dive deep into the code to uncover the cause
Monitor your app directly, or sample the entire system, with very little overhead
