Apple took a quiet step forward this afternoon with the launch of the second beta of its iPhone software development kit (SDK). Apple sent an email to developers in its program informing them that the second beta was available for download on the company"s Developer Connection web site.
"The second beta version of the iPhone SDK includes Interface Builder, Xcode IDE, Instruments, iPhone simulator, frameworks and samples, compilers, and Shark analysis tool," the site reads. Interface Builder is "an application for designing and testing user interfaces. Developers can use Interface Builder to create user interfaces that follow the Mac OS X human-interface guidelines by dragging user-interface elements from a palette of predefined controls and dropping them into the window or view they are configuring," according to Apple.