I'm getting a bit confused with navigation bars and toolbars when migrating from iPhone to iPad, since toolbars in iPad seem to be moved to the top, as described in iOS Human Interface Guidelines, so I'm not clear about the difference between navigation bars and toolbars in iPad devices. I have doubts about them and the buttons and controls that can be displayed in each case, and I don`t find any example that solves them:
1) Is it possible to "mix" a navigation bar and a toolbar, and display back buttons and toolbar items at the same time? For instance, I found that Mail app has toolbar items on the right side of its split view, and a navigation bar with back button in the left side of the split view, so back buttons and toolbar items are always in separated bars in this app:
Similarly, Settings app displays a navigation bar with back buttons in the right side of the split view but no toolbar items:
Where could I find an example of an app with a bar displaying both navigation back buttons and toolbar items in iPad? Or is it just not possible?
2) Is it possible to display a segmented control in a navigation bar with a title, instead of being in a toolbar without title like this? (iOS Human Interface Guidelines document says it is a toolbar):
3) Let's say I have a split view similar to Settings app. Is it valid, or correct, to display a toolbar on the right side sometimes, and a navigation bar another times? Or should I always display the same type of bar througout the app?