Navigation Controller以一個棧的形式維護VC，通過pushViewController入棧，popViewController出棧。

頁面分幾部分：Navigation bar, Custom Content和Navigation toolbar

1.Navigation bar

1.簡單實用

UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:@selector(selectLeftAction:)];

self.navigationItem.leftBarButtonItem = leftButton;

UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd? target:self action:@selector(selectRightAction:)];

self.navigationItem.rightBarButtonItem = rightButton;

2.還有一些系統(tǒng)提供的自定義風格的button形式，詳細內(nèi)容

3.titleView

titleView可以替換成button，或者SegmentedControl，具體方法參見

2.Navigation toolbar

toolbar使用

hidesBottomBarWhenPushed

http://blog.csdn.net/holydancer/article/details/8097585