UINavigationBar详解

设置导航栏标题

self.navigationItem.title = @"导航栏标题"

设置导航栏的背景颜色

self.navigationController.navigationBar.barTintColor = [UIColor redColor];

设置导航栏的背景图片

[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"图片"] forBarMetrics:UIBarMetricsDefault];

UIBarMetrics枚举：
UIBarMetricsDefault -> 在横竖屏都显示
UIBarMetricsCompact -> 只有横屏才显示
...

更改顶部状态栏的颜色

系统提供两种样式:

• UIStatusBarStyleDefault:系统默认样式，黑色内容，用于浅色的背景
• UIStatusBarStyleLightContent:白色内容，用于深色的背景

1. 需要在工程的Info.plist文件中添加一行View controller-based status bar appearance，设置为NO
2. 然后在ViewController中添加如下方法

- （UIStatusBarStyle）preferredStatusBarStyle{
 return UIStatusBarStyleLightContent;
}

设置返回按钮

• 设置返回按钮的颜色

self.navigationController.navigationBar.tintColor = [UIColor whiteColor];

• 设置返回按钮图片

// imageWithRenderingModel:方法，参数UIImageRenderingModeAlwaysOriginal表示总是用原图渲染，如果不这么设置，返回的按钮将会显示tintColor的颜色，UITabbarItem存在同样问题
UIImage *image = [[UIImage imageName:@""]  imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithImage:style:UIBarButtonItemStyleBordered target:self action:@selector(backMethod)];

self.navigationItem.leftBarButtonItem = leftButton;

// 修复navigationController侧滑关闭失效问题
self.navigationController.interactivePopGestureRecognizer.delegate = (id)self;

• 设置返回按钮文字

UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:self action:@selector(backMethod)];

letfButton.tintColor = [UIColor whiteColor];

self.navigationItem.leftBarButtonItem = leftButton;

• 自定义返回按钮

UIBarButtonItem *leftBarButton = [[UIBarButtonItem alloc] initWithCustomView:leftButtonView];

self.navigationItem.leftBarButtonItem = leftBarButton;

rightBarButton 参照如上

隐藏导航栏底部的线条

• 设置导航栏的shadowImage

UINavigationBar *navigationBar = self.navigationController.navigationBar;

[navigationBar setShadowImage:[UIImage new]]

• 设置导航栏的clipsToBounds的值

self.navigationController.navigationbar.clipsToBounds = YES;

设置导航栏添加多个按钮

• 方法一

UIBarButtonItem *closeItem = [[UIBarButtonItem alloc] initWithTitle:@"关闭" style:UIBarButtonItemStylePlain target:self action:@selector(close)];

self.navigationItem.leftItemSupplementBackButton = YES;

• 方法二

UIButton *leftButton = [UIButton buttonWithType:UIButtonTypeSystem];

...自定义button过程

UIBarButton *backItem = [[UIBarButtonItem alloc] initWithCustomView:leftButton];

self.navigationItem.leftBarButtonItems = @[backItem, closeItem];

导航栏全局属性设置

[UINavigationBar appearance].barStyle = UIBarStyleBlack;

[[UINavigationBar appearance] setBarTintColor:[UIColor redColor]];

[[UINavigationBar appearance] setTintColor:[UIColor blueColor]];