如何使用Cocoa实现布局编辑器

I want to build an OS X application, in which one of the requirements is for the user to be able to generate PDF output according to a layout that they, the user, will create. Typical items on the page would be things like a corporate logo (a JPEG or PNG), an address (a block of text) and a narrative (another block of text).I want to build an OS X application, in which o