navigationController基本设置

//    设置导航栏的文字
    self.navigationItem.title = @"功效";

//    设置导航栏的颜色
    self.navigationController.navigationBar.barTintColor =
[UIColor orangeColor];

//    设置导航栏上字体颜色
 
 
[self.navigationController.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor],NSForegroundColorAttributeName, nil]];

//    设置导航栏不透明

self.navigationController.navigationBar.translucent = NO;

//设置左侧返回按钮颜色
    self.navigationItem.leftBarButtonItem.tintColor =
[UIColor whiteColor];

//设置右侧取消按钮的颜色
    self.navigationItem.rightBarButtonItem.tintColor =
[UIColor whiteColor];

导航控制器也可添加一下其他控件，如搜索栏，分段视图等

例：

mySearchBar = [[UISearchBaralloc]
initWithFrame:CGRectMake(0, 25, 50, 30)];

mySearchBar.delegate =
self;

mySearchBar.placeholder =
@"请输入查询的蔬菜、水果等的品名";// 
设置占位符

searchDisplayController =
[[UISearchDisplayControlleralloc]
initWithSearchBar:mySearchBarcontentsController:self];

searchDisplayController.active = NO;

self.navigationItem.titleView = mySearchBar;//
 添加到导航控制器上

[mySearchBarrelease];

[searchDisplayControllerrelease];

运行效果如下：