设置导航条title

self.navigationItem.title = @"设置title";

设置导航条title样式

    NSDictionary *attributes=[NSDictionary dictionaryWithObjectsAndKeys:[UIColor blackColor],NSForegroundColorAttributeName,[UIFont boldSystemFontOfSize:19],NSFontAttributeName, nil];
    [self.navigationController.navigationBar setTitleTextAttributes:attributes];

设置导航条背景图片

    [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"导航条背景图片"] forBarMetrics:UIBarMetricsDefault];
    [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"导航条背景图片"] forBarPosition:UIBarPositionAny barMetrics:UIBarMetricsDefault];

导航条样式

下面记录几种导航条按钮的创建方法：

1、系统提供的设置文字或者图片

    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"设置文字" style:UIBarButtonItemStylePlain target:self action:@selector(right)];
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"图片名字"] style:UIBarButtonItemStylePlain target:self action:@selector(right)];

2、修改系统导航条按钮内容样式
UIBarButtonItemStyleDone文字颜色会加粗，UIBarButtonItemStylePlain文字颜色不加粗

    UIBarButtonItem *right = [[UIBarButtonItem alloc]initWithTitle:@"右侧按钮" style:UIBarButtonItemStyleDone target:self action:@selector(right:)];
    //设置文字的字体颜色
    right.tintColor = [UIColor blackColor];
    self.navigationItem.rightBarButtonItem = right;

3、自定义一个视图控件（按钮）

    //右侧的菜单按钮
    UIButton *menuBtn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];
    [menuBtn addTarget:self action:@selector(showDropDownMenu) forControlEvents:UIControlEventTouchUpInside];
    [menuBtn setImage:[UIImage imageNamed:@"nemuItem"] forState:UIControlStateNormal];
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:menuBtn];

设置按钮文字字体颜色和大小

    UIButton * button_back = [UIButton buttonWithType:UIButtonTypeCustom];
    [button_back setTitle:@"右侧按钮" forState:UIControlStateNormal];
    [button_back setTitleColor:UIColorFromRGB(0x1c257) forState:UIControlStateNormal];
    button_back.titleLabel.font = [UIFont systemFontOfSize:16];
    [button_back addTarget:self action:@selector(right:) forControlEvents:UIControlEventTouchUpInside];

    UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithCustomView:button_back];
    self.navigationItem.rightBarButtonItem = backButton;

4、titleView

    UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:@[@"消息", @"电话"]];
    segmentedControl.frame = CGRectMake(0, 0, 130, 30);
    segmentedControl.selectedSegmentIndex = 0;
    segmentedControl.tintColor = [UIColor whiteColor]; //设置选中状态的背景颜色
    self.navigationItem.titleView = segmentedControl;