一：首先查看一下關於UINavigationController的定義
NS_CLASS_AVAILABLE_IOS(2_0) @interface UINavigationController : UIViewController //UINavigationController初始化,自定義NavigationBar,自定義toolbar - (instancetype)initWithNavigationBarClass:(nullable Class)navigationBarClass toolbarClass:(nullable Class)toolbarClass NS_AVAILABLE_IOS(5_0); //UINavigationController初始化,導航控制器的根控制器 - (instancetype)initWithRootViewController:(UIViewController *)rootViewController; //壓棧：將目標控制器壓入棧中 - (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated; //彈棧：將棧頂控制器從棧中彈出 - (nullable UIViewController *)popViewControllerAnimated:(BOOL)animated; //彈棧：彈到指定的目標控制器 - (nullable NSArray<__kindof UIViewController *> *)popToViewController:(UIViewController *)viewController animated:(BOOL)animated; //彈棧：彈到根控制器 - (nullable NSArray<__kindof UIViewController *> *)popToRootViewControllerAnimated:(BOOL)animated; //導航棧的棧頂視圖 只讀 就是某個導航棧的棧頂視圖，和導航息息相關 @property(nullable, nonatomic,readonly,strong) UIViewController *topViewController; //當前顯示的控制器 只讀 visibleViewController和哪個導航棧沒有關系，只是當前顯示的控制器，也就是說任意一個導航的visibleViewController所返回的值應該是一樣的 @property(nullable, nonatomic,readonly,strong) UIViewController *visibleViewController; //棧里的視圖控制器數組 @property(nonatomic,copy) NSArray<__kindof UIViewController *> *viewControllers; //替換棧中的視圖控制器數組 - (void)setViewControllers:(NSArray<UIViewController *> *)viewControllers animated:(BOOL)animated NS_AVAILABLE_IOS(3_0); //是否隱藏導航欄 @property(nonatomic,getter=isNavigationBarHidden) BOOL navigationBarHidden; //設置導航欄隱藏 是否有動畫 - (void)setNavigationBarHidden:(BOOL)hidden animated:(BOOL)animated; //導航欄 @property(nonatomic,readonly) UINavigationBar *navigationBar; //toolbar是否隱藏 @property(nonatomic,getter=isToolbarHidden) BOOL toolbarHidden NS_AVAILABLE_IOS(3_0); //toolbar是否隱藏 是否有動畫 - (void)setToolbarHidden:(BOOL)hidden animated:(BOOL)animated NS_AVAILABLE_IOS(3_0); //toolbar對象 @property(null_resettable,nonatomic,readonly) UIToolbar *toolbar NS_AVAILABLE_IOS(3_0); //委托 @property(nullable, nonatomic, weak) id<UINavigationControllerDelegate> delegate; //邊緣側滑返回手勢 @property(nullable, nonatomic, readonly) UIGestureRecognizer *interactivePopGestureRecognizer NS_AVAILABLE_IOS(7_0); //展示視圖控制器 - (void)showViewController:(UIViewController *)vc sender:(nullable id)sender NS_AVAILABLE_IOS(8_0); // Interpreted as pushViewController:animated: //輸入鍵盤出現時將導航欄隱藏 IOS8特性 @property (nonatomic, readwrite, assign) BOOL hidesBarsWhenKeyboardAppears NS_AVAILABLE_IOS(8_0); //滾動頁面時隱藏Bar IOS8特性 @property (nonatomic, readwrite, assign) BOOL hidesBarsOnSwipe NS_AVAILABLE_IOS(8_0); //獲取能夠隱藏navigationBar的滑動手勢 只讀 @property (nonatomic, readonly, strong) UIPanGestureRecognizer *barHideOnSwipeGestureRecognizer NS_AVAILABLE_IOS(8_0); //當設置為true時，橫向方向時隱藏NavigationBar @property (nonatomic, readwrite, assign) BOOL hidesBarsWhenVerticallyCompact NS_AVAILABLE_IOS(8_0); //當設置為true時，如果有沒處理的點擊手勢就會隱藏和現實navigationBar @property (nonatomic, readwrite, assign) BOOL hidesBarsOnTap NS_AVAILABLE_IOS(8_0); //獲取能夠隱藏navigationBar的點擊手勢 只讀 @property (nonatomic, readonly, assign) UITapGestureRecognizer *barHideOnTapGestureRecognizer NS_AVAILABLE_IOS(8_0); @end
知識點1：UINavigationController UINavigationBar UINavigationItem三者的關系
通俗地說就是，UINavigationController是個容器，里面可以裝很多UIViewController。裝這么多UIViewController讓用戶怎么控制它們呢，總得有個工具吧。這個工具就是UINavigationBar。一個容器就這么一個bar，相當於控制台吧。但是，管理那么多UIViewController，控制台上得按鈕啊、標題啊，都千篇一律是不是看起來太無聊了。為了解決這個問題，UINavigationController為每個UIViewController生成一個UINavigationItem，通過這個UINavigationItem可以改變控制台“上面”得按鈕和標題。如果你不自定義UINavigationItem，UINavigationController會使用默認的;
UINavigationController是UIViewController的子類，UINavigationBar是UIView的子類。
UINavigationBar是UINavigationController的一個組成部分，就是上面的那個導航欄。
UINavigationBar又有UINavigationItem組成。
UINavigationItem則有title，按鈕，提示文本等組成，就是我們看到的title文字，右上角的按鈕。
navigation item在navigation Bar代表一個viewController，具體一點兒來說就是每一個加到navigationController的viewController都會有一個對應的navigationItem一個導航控制器控制多個視圖，NavigationBar上的leftItem,rightItem,title是由當前的視圖控制器控制的
二：UINavigationControllerDelegate的定義內容
/** * 將要顯示目標控制器 * * @param navigationController 當前導航控制器 * @param viewController 目標視圖控制器 * @param animated 動畫 */ - (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated; /** * 目標控制器最終顯示 * * @param navigationController 當前導航控制器 * @param viewController 目標視圖控制器 * @param animated 動畫 */ - (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated; /** * 橫豎屏切換 * * @param navigationController 當前導航控制器 * * @return 橫豎屏方向 */ - (UIInterfaceOrientationMask)navigationControllerSupportedInterfaceOrientations:(UINavigationController *)navigationController NS_AVAILABLE_IOS(7_0) __TVOS_PROHIBITED; /** * 橫豎屏切換 * * @param navigationController 當前導航控制器 * * @return 橫豎屏方向 */ - (UIInterfaceOrientation)navigationControllerPreferredInterfaceOrientationForPresentation:(UINavigationController *)navigationController NS_AVAILABLE_IOS(7_0) __TVOS_PROHIBITED; /** * 轉場動畫 * * @param navigationController 當前導航控制器 * @param animationController 動畫控制器 * * @return 轉場動畫 */ - (nullable id <UIViewControllerInteractiveTransitioning>)navigationController:(UINavigationController *)navigationController interactionControllerForAnimationController:(id <UIViewControllerAnimatedTransitioning>) animationController NS_AVAILABLE_IOS(7_0); /** * 轉場動畫 * * @param navigationController 當前導航控制器 * @param operation 動畫類型枚舉 * @param fromVC 起始視圖控制器 * @param toVC 目標視圖控制器 * * @return 轉場動畫 */ - (nullable id <UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController animationControllerForOperation:(UINavigationControllerOperation)operation fromViewController:(UIViewController *)fromVC toViewController:(UIViewController *)toVC NS_AVAILABLE_IOS(7_0);
UINavigationController的delegate方法我平時的開發工作中很少用到
三：UIViewController (UINavigationControllerItem)分類
@interface UIViewController (UINavigationControllerItem) //導航欄上面用戶自定義視圖 @property(nonatomic,readonly,strong) UINavigationItem *navigationItem; //推送時隱藏bottom @property(nonatomic) BOOL hidesBottomBarWhenPushed; //下級視圖的導航控制器 @property(nullable, nonatomic,readonly,strong) UINavigationController *navigationController; @end
知識點1：UINavigationControllerItem因為擴展在UIViewController上，所以可以直接在UIViewController中使用下面的代碼進行調用跟設置；
self.navigationItem.title = @"UINavigationBar使用總結";
四：UIViewController (UINavigationControllerContextualToolbarItems)分類 拓展toolbarItems屬性
@interface UIViewController (UINavigationControllerContextualToolbarItems) //屬性設置工具條中包含的按鈕 @property (nullable, nonatomic, strong) NSArray<__kindof UIBarButtonItem *> *toolbarItems NS_AVAILABLE_IOS(3_0); - (void)setToolbarItems:(nullable NSArray<UIBarButtonItem *> *)toolbarItems animated:(BOOL)animated NS_AVAILABLE_IOS(3_0); @end
五：關於UINavigationBar定義內容
NS_CLASS_AVAILABLE_IOS(2_0) @interface UINavigationBar : UIView <NSCoding, UIBarPositioning> @property(nonatomic,assign) UIBarStyle barStyle; @property(nullable,nonatomic,weak) id<UINavigationBarDelegate> delegate; //Translucent設置成透明度,設置成YES會有一種模糊效果 @property(nonatomic,assign,getter=isTranslucent) BOOL translucent NS_AVAILABLE_IOS(3_0) UI_APPEARANCE_SELECTOR; //UINavigationBar上面不只是簡單的顯示標題，它也將標題進行了堆棧的管理，每一個標題抽象為的對象在iOS系統中是UINavigationItem對象，我們可以通過push與pop操作管理item組。 //向棧中添加一個item，上一個item會被推向導航欄的左側，變為pop按鈕，會有一個動畫效果 - (void)pushNavigationItem:(UINavigationItem *)item animated:(BOOL)animated; //pop一個item - (nullable UINavigationItem *)popNavigationItemAnimated:(BOOL)animated; //當前push到最上層的item @property(nullable, nonatomic,readonly,strong) UINavigationItem *topItem; //僅次於最上層的item，一般式被推向導航欄左側的item @property(nullable, nonatomic,readonly,strong) UINavigationItem *backItem; //獲取堆棧中所有item的數組 @property(nullable,nonatomic,copy) NSArray<UINavigationItem *> *items; //設置一組item - (void)setItems:(nullable NSArray<UINavigationItem *> *)items animated:(BOOL)animated; //系統類型按鈕文字顏色 @property(null_resettable, nonatomic,strong) UIColor *tintColor; //通過barTintColor來設置背景色 @property(nullable, nonatomic,strong) UIColor *barTintColor NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR; //設置工具欄背景和陰影圖案 - (void)setBackgroundImage:(nullable UIImage *)backgroundImage forBarPosition:(UIBarPosition)barPosition barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR; - (nullable UIImage *)backgroundImageForBarPosition:(UIBarPosition)barPosition barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR; //通過背景圖片來設置導航欄的外觀 - (void)setBackgroundImage:(nullable UIImage *)backgroundImage forBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; - (nullable UIImage *)backgroundImageForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; //背景陰影圖片 - 即分割線 @property(nullable, nonatomic,strong) UIImage *shadowImage NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR; //標題的富文本 @property(nullable,nonatomic,copy) NSDictionary<NSString *,id> *titleTextAttributes NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; //標題垂直偏移 - (void)setTitleVerticalPositionAdjustment:(CGFloat)adjustment forBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; - (CGFloat)titleVerticalPositionAdjustmentForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; //設置返回按鈕的圖片 @property(nullable,nonatomic,strong) UIImage *backIndicatorImage NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR; @property(nullable,nonatomic,strong) UIImage *backIndicatorTransitionMaskImage NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR; @end
UINavigationBar是用於實現管理層級關系內容的組件，直接繼承自UIView。通常用在UINavgationController類中，用於管理和顯示UINavgationController的subViewController , 同時UINavgationBar也可以單獨使用，添加至任何的UIView中。UINavigationBar比較重要的屬性為，左側按鈕，中間的標題，以及右側按鈕。在平時的應用程序中，我們常常使用到自定義UINavigationBar來完成導航條的設置。
知識點1：導航欄全局屬性設置
//全局設置導航欄主題 - (void)setNavigationControllerAppearance { [UINavigationBar appearance].barStyle = UIBarStyleBlack; [[UINavigationBar appearance] setBarTintColor:[UIColor colorWithWhite:0.1 alpha:0.5]]; [[UINavigationBar appearance] setTintColor:[UIColor whiteColor]]; }
全局設置導航欄的好處有兩個：一是不用對每個NavigationBar進行設置；二是方便做主題管理，切換主題，只需要更改全局設置即可。
知識點2:自定義返回的圖標並去除文字，要同時設置setBackIndicatorImage、setBackIndicatorTransitionMaskImage
[self.navigationController.navigationBar setBackIndicatorImage:[UIImage imageNamed:@"navibar_back_btn_bg_normal.png"]]; [self.navigationController.navigationBar setBackIndicatorTransitionMaskImage:[UIImage imageNamed:@"navibar_back_btn_bg_normal.png"]]; UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStyleBordered target:nil action:nil]; self.navigationItem.backBarButtonItem = backItem;
知識點3：設置導航條底部線條的顏色
顏色轉圖片的代碼： @implementation UIImage (ColorImage) + (UIImage *)imageWithColor:(UIColor *)color { CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f); UIGraphicsBeginImageContext(rect.size); CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetFillColorWithColor(context, [color CGColor]); CGContextFillRect(context, rect); UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return image; } @end 設置導航欄底部線條顏色的代碼： UINavigationBar *navigationBar = self.navigationController.navigationBar; [navigationBar setBackgroundImage:[[UIImage alloc] init] forBarPosition:UIBarPositionAny barMetrics:UIBarMetricsDefault]; //此處使底部線條顏色為紅色 [navigationBar setShadowImage:[UIImage imageWithColor:[UIColor redColor]]];
知識點4：隱藏導航條底部線條
//找查到Nav底部的黑線 - (UIImageView *)findHairlineImageViewUnder:(UIView *)view { if ([view isKindOfClass:UIImageView.class] && view.bounds.size.height <= 1.0) { return (UIImageView *)view; } for (UIView *subview in view.subviews) { UIImageView *imageView = [self findHairlineImageViewUnder:subview]; if (imageView) { return imageView; } } return nil; } 然后設置這個UIImageView為隱藏就可以了；
方法二：這種主要是隱藏后沒辦法再顯示出來
UINavigationBar *navigationBar = self.navigationController.navigationBar; //設置透明的背景圖，便於識別底部線條有沒有被隱藏 [navigationBar setBackgroundImage:[[UIImage alloc] init] forBarPosition:UIBarPositionAny barMetrics:UIBarMetricsDefault]; //此處使底部線條失效 [navigationBar setShadowImage:[UIImage new]];
六：關於UINavigationItem的定義
NS_CLASS_AVAILABLE_IOS(2_0) @interface UINavigationItem : NSObject <NSCoding> - (instancetype)initWithTitle:(NSString *)title NS_DESIGNATED_INITIALIZER; - (nullable instancetype)initWithCoder:(NSCoder *)coder NS_DESIGNATED_INITIALIZER; //設置導航欄中間的內容標題 @property(nullable, nonatomic,copy) NSString *title; //設置導航欄中間的內容視圖 @property(nullable, nonatomic,strong) UIView *titleView; @property(nullable,nonatomic,copy) NSString *prompt; //返回 @property(nullable,nonatomic,strong) UIBarButtonItem *backBarButtonItem; //是否隱藏返回Button @property(nonatomic,assign) BOOL hidesBackButton; - (void)setHidesBackButton:(BOOL)hidesBackButton animated:(BOOL)animated; //左邊數組Item @property(nullable,nonatomic,copy) NSArray<UIBarButtonItem *> *leftBarButtonItems NS_AVAILABLE_IOS(5_0); //右邊數組Item @property(nullable,nonatomic,copy) NSArray<UIBarButtonItem *> *rightBarButtonItems NS_AVAILABLE_IOS(5_0); - (void)setLeftBarButtonItems:(nullable NSArray<UIBarButtonItem *> *)items animated:(BOOL)animated NS_AVAILABLE_IOS(5_0); - (void)setRightBarButtonItems:(nullable NSArray<UIBarButtonItem *> *)items animated:(BOOL)animated NS_AVAILABLE_IOS(5_0); //通過指定該屬性為YES，可以讓leftBarButtonItem和backBarButtonItem同時顯示，其中leftBarButtonItem顯示在backBarButtonItem的右邊 默認值為NO @property(nonatomic) BOOL leftItemsSupplementBackButton NS_AVAILABLE_IOS(5_0); //左邊Item @property(nullable, nonatomic,strong) UIBarButtonItem *leftBarButtonItem; //右邊Item @property(nullable, nonatomic,strong) UIBarButtonItem *rightBarButtonItem; - (void)setLeftBarButtonItem:(nullable UIBarButtonItem *)item animated:(BOOL)animated; - (void)setRightBarButtonItem:(nullable UIBarButtonItem *)item animated:(BOOL)animated; @end
UINavigationController會為每一個入棧的UIViewController生成一個UINavigationItem. UIViewController通過修改UINavigationItem可以控制UINavigationBar上的按鈕和標題等
知識點1：關於UINavigationItem內容
你可以通過設置self.navigationItem.leftBarButtonItem為某個ButtonItem， self.navigationItem.leftBarButtonItem self.navigationItem.rightBarButtonItem self.navigationItem.backBarButtonItem self.navigationItem.titleView等等 注：1、這里的self 指的是UIViewController。 2、如果你在新視圖中不修改backBarButtonItem 或leftBarButtonItem UINavigationController 會自動添加左邊返回按鈕用以返回了一個視圖。總體的顯示原則如下： 1）、Left side of the navigationBar 左按鈕 a）如果當前的viewController設置了leftBarButtonItem，則顯示當前VC所自帶的leftBarButtonItem。 b）如果當前的viewController沒有設置leftBarButtonItem，且當前VC不是rootVC的時候，則顯示前一層VC的backBarButtonItem。如果前一層的VC沒有顯示的指定backBarButtonItem的話，系統將會根據前一層VC的title屬性自動生成一個back按鈕，並顯示出來。 c）如果當前的viewController沒有設置leftBarButtonItem，且當前VC已是rootVC的時候，左邊將不顯示任何東西。 此處注意：5.0中新增加了一個屬性leftItemsSupplementBackButton，通過指定該屬性為YES，可以讓leftBarButtonItem和backBarButtonItem同時顯示，其中leftBarButtonItem顯示在backBarButtonItem的右邊。 2)、title 標題 a）如果當前VC通過 .navigationItem.titleView指定了自定義的titleView，系統將會顯示指定的titleView，此處要注意自定義titleView的高度不要超過navigationBar的高度，否則會顯示出界。 b）如果當前VC沒有指定titleView，系統則會根據當前VC的title或者當前VC的navigationItem.title的內容創建一個UILabel並顯示，其中如果指定了navigationItem.title的話，則優先顯示navigationItem.title的內容。 3)、Right side of the navigationBar 右按鈕 a）如果當前VC指定了rightBarButtonItem的話，則顯示指定的內容。 b）如果當前VC沒有指定rightBarButtonItem的話，則不顯示任何東西。
知識點2：相關屬性運用
NavigationBar設置中間的標題或者自定義View [self.navigationItem setTitle:@"旅行"]; [self.navigationItem setTitleView:[UIImage imageNamed:@"圖片名稱"]; 單個或多個左右Item設置:單個leftItem設置: UIBarButtonItem *leftBarButton = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"BackIcon"] style:UIBarButtonItemStylePlain target:self action:nil]; [leftBarButton setTintColor:[UIColor colorWithWhite:0 alpha:1]]; self.navigationItem.leftBarButtonItem = leftBarButton; 多個rightItem設置: UIBarButtonItem *firstItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemReply target:self action:nil]; UIBarButtonItem *secondItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemTrash target:self action:nil]; NSArray *rightItems = @[firstItem, secondItem]; self.navigationItem.rightBarButtonItems = rightItems;
知識點3：設置偏移值
// 返回按鈕內容左靠 button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft; // 讓返回按鈕內容繼續向左邊偏移10 button.contentEdgeInsets = UIEdgeInsetsMake(0, -10, 0, 0); viewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];
七：UIBarButtonItem定義內容
NS_CLASS_AVAILABLE_IOS(2_0) @interface UIBarButtonItem : UIBarItem <NSCoding> - (instancetype)init NS_DESIGNATED_INITIALIZER; //初始化 - (nullable instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER; - (instancetype)initWithImage:(nullable UIImage *)image style:(UIBarButtonItemStyle)style target:(nullable id)target action:(nullable SEL)action; - (instancetype)initWithImage:(nullable UIImage *)image landscapeImagePhone:(nullable UIImage *)landscapeImagePhone style:(UIBarButtonItemStyle)style target:(nullable id)target action:(nullable SEL)action NS_AVAILABLE_IOS(5_0); - (instancetype)initWithTitle:(nullable NSString *)title style:(UIBarButtonItemStyle)style target:(nullable id)target action:(nullable SEL)action; - (instancetype)initWithBarButtonSystemItem:(UIBarButtonSystemItem)systemItem target:(nullable id)target action:(nullable SEL)action; //自定義視圖 - (instancetype)initWithCustomView:(UIView *)customView; //樣式 @property(nonatomic) UIBarButtonItemStyle style; // default is UIBarButtonItemStylePlain @property(nonatomic) CGFloat width; @property(nullable, nonatomic,copy) NSSet<NSString *> *possibleTitles; // default is nil //自定義視圖 @property(nullable, nonatomic,strong) __kindof UIView *customView; @property(nullable, nonatomic) SEL action; // default is NULL @property(nullable, nonatomic,weak) id target; // default is nil - (void)setBackgroundImage:(nullable UIImage *)backgroundImage forState:(UIControlState)state barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; - (nullable UIImage *)backgroundImageForState:(UIControlState)state barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; - (void)setBackgroundImage:(nullable UIImage *)backgroundImage forState:(UIControlState)state style:(UIBarButtonItemStyle)style barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR; - (nullable UIImage *)backgroundImageForState:(UIControlState)state style:(UIBarButtonItemStyle)style barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR; @property(nullable, nonatomic,strong) UIColor *tintColor NS_AVAILABLE_IOS(5_0); - (void)setBackgroundVerticalPositionAdjustment:(CGFloat)adjustment forBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; - (CGFloat)backgroundVerticalPositionAdjustmentForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; - (void)setTitlePositionAdjustment:(UIOffset)adjustment forBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; - (UIOffset)titlePositionAdjustmentForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; - (void)setBackButtonBackgroundImage:(nullable UIImage *)backgroundImage forState:(UIControlState)state barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; - (nullable UIImage *)backButtonBackgroundImageForState:(UIControlState)state barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; - (void)setBackButtonTitlePositionAdjustment:(UIOffset)adjustment forBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; - (UIOffset)backButtonTitlePositionAdjustmentForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; - (void)setBackButtonBackgroundVerticalPositionAdjustment:(CGFloat)adjustment forBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; - (CGFloat)backButtonBackgroundVerticalPositionAdjustmentForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR; @end
知識點1：UIBarButtonSystemItem的樣式介紹
typedef NS_ENUM(NSInteger, UIBarButtonSystemItem) { UIBarButtonSystemItemDone,//顯示完成 UIBarButtonSystemItemCancel,//顯示取消 UIBarButtonSystemItemEdit, //顯示編輯 UIBarButtonSystemItemSave, //顯示保存 UIBarButtonSystemItemAdd,//顯示加號 UIBarButtonSystemItemFlexibleSpace,//什么都不顯示，占位一個空間位置 UIBarButtonSystemItemFixedSpace,//和上一個類似 UIBarButtonSystemItemCompose,//顯示寫入按鈕 UIBarButtonSystemItemReply,//顯示循環按鈕 UIBarButtonSystemItemAction,//顯示活動按鈕 UIBarButtonSystemItemOrganize,//顯示組合按鈕 UIBarButtonSystemItemBookmarks,//顯示圖書按鈕 UIBarButtonSystemItemSearch,//顯示查找按鈕 UIBarButtonSystemItemRefresh,//顯示刷新按鈕 UIBarButtonSystemItemStop,//顯示停止按鈕 UIBarButtonSystemItemCamera,//顯示相機按鈕 UIBarButtonSystemItemTrash,//顯示移除按鈕 UIBarButtonSystemItemPlay,//顯示播放按鈕 UIBarButtonSystemItemPause,//顯示暫停按鈕 UIBarButtonSystemItemRewind,//顯示退后按鈕 UIBarButtonSystemItemFastForward,//顯示前進按鈕 UIBarButtonSystemItemUndo,//顯示消除按鈕 UIBarButtonSystemItemRedo ,//顯示重做按鈕 UIBarButtonSystemItemPageCurl ,//在tool上有效 };
例如： self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(right:)]; - (void)right:(id)sender { NSLog(@"rightBarButtonItem"); }
知識點2：自定義UIView的UIBarButtonItem
UIView *testView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 40, 60)]; self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:testView];
最近有個妹子弄的一個關於擴大眼界跟內含的訂閱號，每天都會更新一些深度內容，在這里如果你感興趣也可以關注一下(嘿對美女跟知識感興趣)，當然可以關注后輸入：github 會有我的微信號，如果有問題你也可以在那找到我；當然不感興趣無視此信息；
