一、简介
< < <<继承关系：UINavigationBar --> UIView -->UIResponder-->NSObject 格式为 1--> 设置UINavigationBar的样式（属性的作用） typedef NS_ENUM(NSInteger, UIBarStyle) { UIBarStyleDefault = 0, UIBarStyleBlack = 1, UIBarStyleBlackOpaque = 1, // Deprecated. Use UIBarStyleBlack UIBarStyleBlackTranslucent = 2, // Deprecated. Use UIBarStyleBlack and set the translucent property to YES } __TVOS_PROHIBITED; ;(如果属性有枚举类型的话，这里会有枚举类型说明） navigationBar.barStyle =UIBarStyleBlack;（这是具体的例子） @property(nonatomic) UIBarStyle barStyle UI_APPEARANCE_SELECTOR __TVOS_PROHIBITED; （这是属性的说明） 二、UINavigationBar的属性(属性的顺序与苹果API一致) 1--> 设置UINavigationBar的样式 typedef NS_ENUM(NSInteger, UIBarStyle) { UIBarStyleDefault = 0,//默认样式 UIBarStyleBlack = 1,//黑色 UIBarStyleBlackOpaque = 1, // 弃用属性 UIBarStyleBlackTranslucent = 2, // 弃用属性 } __TVOS_PROHIBITED; toolBar.barStyle =UIBarStyleBlack; @property(nonatomic) UIBarStyle barStyle UI_APPEARANCE_SELECTOR __TVOS_PROHIBITED; 2-->声明UINavigationBarDelegate代理 navigationBar .delegate = self;//声明代理 @property(nullable, nonatomic, weak) id 3-->设置UINavigationBar是否透明 navigationBar.translucent =NO； @property(nonatomic,assign,getter=isTranslucent) BOOL translucent NS_AVAILABLE_IOS(3_0) UI_APPEARANCE_SELECTOR; //iOS 6和之前，默认情况下为NO。如果barStyle将UIBarStyleBlackTranslucent总是YES。 4、将新的UINavigationItem 压入栈 [navigationBar pushNavigationItem:item animated:NO]; - (void)pushNavigationItem:(UINavigationItem *)item animated:(BOOL)animated; 4、将顶部的UINavigationItem 推出栈 [navigationBar pushNavigationItem:item animated:NO]; - (nullable UINavigationItem *)popNavigationItemAnimated:(BOOL)animated; // 返回已弹出的项。 5、当前push到最上层的item UINavigationItem *theTop=[navigationBar topItem]; @property(nullable, nonatomic,readonly,strong) UINavigationItem *topItem;//只读属性 6、仅次于最上层的item，一般式被推向导航栏左侧的item UINavigationItem *theTop=[navigationBar backItem]; @property(nullable, nonatomic,readonly,strong) UINavigationItem *backItem;//只读属性 7、获取堆栈中所有item的数组 NSArray *array=[navigationBar items]; @property(nullable,nonatomic,copy) NSArray 8、设置一组item [navigationBar setItems:items animated:NO]; - (void)setItems:(nullable NSArray *)items animated:(BOOL)animated;// 如果动画是YES，则模拟一个push或pop，这取决于新的top项目是否在堆栈中。 9、是否显示大标题 self.navigationController.navigationBar.prefersLargeTitles=YES;//这句话表示是否显示大标题 @property (nonatomic, readwrite, assign) BOOL prefersLargeTitles; 10、设置渲染颜色，会影响选中字体和图案的渲染 navigationBar.tintColor=[UIColor redColor]; @property(null_resettable, nonatomic,strong) UIColor *tintColor; 11、设置导航栏的颜色 navigationBar.barTintColor = [UIColor whiteColor]; @property(nullable, nonatomic, strong) UIColor *barTintColor NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR;// barTintColor会影响背景颜色, iOS7出现的新属性,用来代替tintColor的作用 12、通过导航栏位置和量度设置背景图片 //设置透明的背景图，便于识别底部线条有没有被隐藏 [navigationBar setBackgroundImage:[[UIImage alloc] init] forBarPosition:UIBarPositionAny barMetrics:UIBarMetricsDefault]; - (void)setBackgroundImage:(nullable UIImage *)backgroundImage forBarPosition:(UIBarPosition)barPosition barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR; 13、通过导航栏位置和量度获取背景图片 UIImage *image=[navBar backgroundImageForBarPosition:UIBarPositionAny barMetrics:UIBarMetricsDefault]; - (nullable UIImage *)backgroundImageForBarPosition:(UIBarPosition)barPosition barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR; 14、通过导航栏量度设置背景图片 [navigationBar setBackgroundImage:[[UIImage alloc] init] for BarMetrics:UIBarMetricsDefault]; - (void)setBackgroundImage:(nullable UIImage *)backgroundImage forBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; 15、通过导航栏量度获取背景图片 UIImage *image=[navBar backgroundImageForBarMetrics:UIBarMetricsDefault]; - (nullable UIImage *)backgroundImageForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; 16、设置导航栏的阴影图片 [navigationBar setShadowImage:[UIImage new]]; @property(nullable, nonatomic,strong) UIImage *shadowImage NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR; 17、设置导航栏的标题字体属性 navigationBar.titleTextAttributes = @{NSForegroundColorAttributeName:[UIColor redColor]}; @property(nullable,nonatomic,copy) NSDictionary *titleTextAttributes NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; 18、设置大标题的文本样式 [self.navigationController.navigationBar setLargeTitleTextAttributes:[NSDictionarydictionaryWithObjectsAndKeys:[UIColor whiteColor], NSForegroundColorAttributeName,[UIFontsystemFontOfSize:18.0f],NSFontAttributeName,nil]]; @property(nullable, nonatomic, copy) NSDictionary *largeTitleTextAttributes UI_APPEARANCE_SELECTOR API_AVAILABLE(ios(11.0)) API_UNAVAILABLE(tvos); 19、设置导航栏标题的竖直位置偏移 [navBar setTitleVerticalPositionAdjustment:10 forBarMetrics:UIBarMetricsDefault];//adjustment指定了偏移量，正值为向下偏移，负值为向上偏移，如设置当前title向下偏移10个像素 - (void)setTitleVerticalPositionAdjustment:(CGFloat)adjustment forBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; 20、获取导航栏标题的竖直位置偏移 CGFloat adjust=[navBar titleVerticalPositionAdjustmentForBarMetrics:UIBarMetricsDefault]; - (CGFloat)titleVerticalPositionAdjustmentForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; 21、设置背景指示器图片（返回按钮的样式，这两个一起设置） [[UINavigationBar appearance] setBackIndicatorImage:[UIImage imageNamed:@"nav_back.png"]]; @property(nullable,nonatomic,strong) UIImage *backIndicatorImage NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR __TVOS_PROHIBITED;//导航栏左侧pop按钮的图案默认是一个箭头，我们可以使用这个的方法修改 22、设置背景指示器图片（返回按钮的样式，这两个一起设置） [[UINavigationBar appearance] setBackIndicatorTransitionMaskImage:[UIImage imageNamed:@"nav_back.png"]]; @property(nullable,nonatomic,strong) UIImage *backIndicatorTransitionMaskImage NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR __TVOS_PROHIBITED;// 通常你说的这两个方法设置的图片应该是一样的， 除非你想让backbutton在点击后的效果有所不同。 三、UINavigationBar的代理属性 1-->item将要push的时候调用，返回NO，则不能push - (BOOL)navigationBar:(UINavigationBar *)navigationBar shouldPushItem:(UINavigationItem *)item{ return NO; } - (BOOL)navigationBar:(UINavigationBar *)navigationBar shouldPushItem:(UINavigationItem *)item; 2-->item已经push后调用 - (void)navigationBar:(UINavigationBar *)navigationBar didPushItem:(UINavigationItem *)item{ } - (void)navigationBar:(UINavigationBar *)navigationBar didPushItem:(UINavigationItem *)item; // 在动画结束时被调用 3-> item将要pop时调用，返回NO，不能pop - (BOOL)navigationBar:(UINavigationBar *)navigationBar shouldPopItem:(UINavigationItem *)item{ return NO; } - (BOOL)navigationBar:(UINavigationBar *)navigationBar shouldPopItem:(UINavigationItem *)item; 4-> item已经pop后调用 - (void)navigationBar:(UINavigationBar *)navigationBar didPopItem:(UINavigationItem *)item{ } - (void)navigationBar:(UINavigationBar *)navigationBar didPopItem:(UINavigationItem *)item; 参考 UINavigationBar 一个有样式的view ios开发UI 控件——UINavigationBar 与UINavigationController navigationBar UInavigationBar上添加左箭头的返回按钮 iOS开发UINavigation——导航控制器UINavigationController