cocoa-sheet

I have a NIB which contains two windows, one is the app's main window visible at launch and the other is a custom sheet (and therefore not visible at launch). When the sheet is required my controller calls: [NSApp beginSheet: sheetWindow modalForWindow: mainWindow modalDelegate: self didEndSelector: @selector(didEndSheet:returnCode:contextInfo:) contextInfo: nil]; which displays the sheet window and starts a modal session, but the window has a standard Aqua title bar, is not 'connected' to the main window and can be moved around just like a regular window. Needless to say, this is not

I have used NSWindowController in projects several times, and feel like I have a (very)rough grasp of the concepts behind this important class. What I would like to do with this post is to clarify/correct my own understandings, and hopefully help other learners get that first step into understanding. It's the at-a-glance concepts, overview, and best practices that I find is most useful, and often lacking in the documentation. Here is my take on NSWindowController (questions are interspersed in bold): An NSWindowController (NSWC) subclass exists (conceptually) just beneath every window nib,