1.更改導(dǎo)航欄的背景和文字的顏色。
方法一：
[self.navigationController.navigationBar setBarTintColor:[UIColor colorWithRed:20/255.0 green:155/255.0 blue:213/255.0 alpha:1.0]];
[self.navigationController.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor],UITextAttributeTextColor,nil]];

方法二：
//設(shè)置NavigationBar背景顏色
[[UINavigationBar appearance] setBarTintColor:[UIColor redColor]];
//@{}代表Dictionary
[[UINavigationBar appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor whiteColor]}];

2.導(dǎo)航欄背景使用圖片
[[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"nav_bg.png"] forBarMetrics:UIBarMetricsDefault];
3.添加多個導(dǎo)航欄按鈕
UIBarButtonItem *shareItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action: nil nil];
UIBarButtonItem *cameraItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action: nil nil];
NSArray *itemsArr = @[shareItem,cameraItem];
self.navigationItem.rightBarButtonItems = itemsArr;

4.解決系統(tǒng)返回按鈕和導(dǎo)航欄背景顏色相同問題
[[UINavigationBar appearance] setTintColor:[UIColor whiteColor]];