... http://www.youtube.com/oreillymediaAcknowledgmentsIn 2007, after iOS became so popular among programmers, I started to learn how toprogram in iOS SDK using an Xcode that was much less advanced than what ... dialog box, make sure iOS is selected as the category on the leftside, and select Cocoa Touch as the subcategory (see Figure 5).Figure 2. Creating a View-based Application for iOS in Xcode4 | Graphics ... context.In iOS, this is the number of points heading right, starting from the left side of therectangle.yThe y position of the origin point of the rectangle in relation to the graphics context.In iOS, ...