创建一个TabBarController:
UITabBarController * tabBar= [[UITabBarController alloc]init];
NSMutableArray *controllerArray = [[NSMutableArray alloc]init];
for (int i=0; i<4; i++) {
UIViewController * con =[[UIViewController alloc]init];
[con loadViewIfNeeded];
con.view.backgroundColor= [UIColor colorWithRed:arc4random()%255/255.0 green:arc4random()%255/255.0blue:arc4random()%255/255.0 alpha:1];
con.tabBarItem.image =[UIImage imageNamed:@"btn_publish_face_a.png"];
con.tabBarItem.title=[NSString stringWithFormat:@"%d",i+1];
con.title = [NSStringstringWithFormat:@"%d",i+1];
[controllerArrayaddObject:con];
通过点击下面的标签按钮,可以很方便的切换控制器。如果我们的控制器数超过4个,系统会被我们创建一个more的导航,并且可以通过系统自带的编辑来调整控制器的顺序,如下:
//管理的viewController数组@property(nullable, nonatomic,copy) NSArray<__kindof UIViewController *> *viewControllers;
- (void)setViewControllers:(NSArray<__kindof UIViewController *> * __nullable)viewControllers animated:(BOOL)animated;
//选中的ViewControlle@property(nullable, nonatomic, assign) __kindof UIViewController *selectedViewController;
//通过编号设置选中ViewController@property(nonatomic) NSUInteger selectedIndex;
//当viewController大于4个时,获取"更多"标签的导航控制器@property(nonatomic, readonly) UINavigationController *moreNavigationController;
//这个属性设置的是可以进行自定义排列顺序的视图控制器,如上面第二张图中的,默认是全部@property(nullable, nonatomic, copy) NSArray<__kindof UIViewController *> *customizableViewControllers;
//标签控制器中分装的标签栏@property(nonatomic,readonly) UITabBar *tabBar NS_AVAILABLE_IOS(3_0);
//代理@property(nullable, nonatomic,weak) id<UITabBarControllerDelegate> delegate;
设置标签:
@property(nullable,nonatomic,copy) NSArray<UITabBarItem *> *items; //设置选中的标签 @property(nullable,nonatomic,assign) UITabBarItem *selectedItem; - (void)setItems:(nullable NSArray<UITabBarItem *> *)items animated:(BOOL)animated;设置自定义标签顺序:
//调用这个方法会弹出一个类似上面第二张截图的控制器,我们可以交换标签的布局顺序 - (void)beginCustomizingItems:(NSArray<UITabBarItem *> *)items; //完成标签布局 - (BOOL)endCustomizingAnimated:(BOOL)animated; //是否正在自定义标签布局 - (BOOL)isCustomizing;设置tabBar颜色相关:
//设置渲染颜色,会影响选中字体和图案的渲染 @property(null_resettable, nonatomic,strong) UIColor *tintColor; //设置导航栏的颜色 @property(nullable, nonatomic,strong) UIColor *barTintColor;设置背景图案:
//设置导航栏背景图案 @property(nullable, nonatomic,strong) UIImage *backgroundImage; //设置选中一个标签时,标签背后的选中提示图案 这个会出现在设置的item图案的后面 @property(nullable, nonatomic,strong) UIImage *selectionIndicatorImage; //设置阴影的背景图案 @property(nullable, nonatomic,strong) UIImage *shadowImageTabBar中标签的宏观属性:
//设置标签item的位置模式 @property(nonatomic) UITabBarItemPositioning itemPositioning; //枚举如下 typedef NS_ENUM(NSInteger, UITabBarItemPositioning) { UITabBarItemPositioningAutomatic,//自动 UITabBarItemPositioningFill,//充满 UITabBarItemPositioningCentered,//中心 } NS_ENUM_AVAILABLE_IOS(7_0); //设置item宽度 @property(nonatomic) CGFloat itemWidth; //设置item间距 @property(nonatomic) CGFloat itemSpacing;与导航栏类似,也可以设置tabBar的风格和透明效果:
//风格 分黑白两种 @property(nonatomic) UIBarStyle barStyle; //是否透明效果 @property(nonatomic,getter=isTranslucent) BOOL translucent;//选中标签时调用
- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item;
//将要开始编辑标签时
- (void)tabBar:(UITabBar *)tabBar willBeginCustomizingItems:(NSArray<UITabBarItem *> *)items; //已经开始编辑标签时
- (void)tabBar:(UITabBar *)tabBar didBeginCustomizingItems:(NSArray<UITabBarItem *> *)items;
//将要进入编辑状态时
- (void)tabBar:(UITabBar *)tabBar willEndCustomizingItems(NSArray<UITabBarItem *> *)items changed:(BOOL)changed;
//已经进入编辑状态时
- (void)tabBar:(UITabBar *)tabBar didEndCustomizingItems(NSArray<UITabBarItem *> *)items changed:(BOOL)changed;
//通过标题和图案进行创建
- (instancetype)initWithTitle:(nullable NSString *)title image:(nullable UIImage *)image tag:(NSInteger)tag;
- (instancetype)initWithTitle:(nullable NSString *)title image:(nullable UIImage *)image selectedImage:(nullable UIImage *)selectedImage;
//创建系统类型的
- (instancetype)initWithTabBarSystemItem:(UITabBarSystemItem)systemItem tag:(NSInteger)tag;
UITabBarSystemItem的枚举如下:
typedef NS_ENUM(NSInteger, UITabBarSystemItem) { UITabBarSystemItemMore,//更多图标 UITabBarSystemItemFavorites,//最爱图标 UITabBarSystemItemFeatured,//特征图标 UITabBarSystemItemTopRated,//高级图标 UITabBarSystemItemRecents,//最近图标 UITabBarSystemItemContacts,//联系人图标 UITabBarSystemItemHistory,//历史图标 UITabBarSystemItemBookmarks,//图书图标 UITabBarSystemItemSearch,//查找图标 UITabBarSystemItemDownloads,//下载图标 UITabBarSystemItemMostRecent,//记录图标 UITabBarSystemItemMostViewed,//全部查看图标 };UITabBarItem常用属性:
//设置选中图案 @property(nullable, nonatomic,strong) UIImage *selectedImage;下面这个属性可以设置item的头标文字:
con.tabBarItem.badgeValue = @"1";//设置标题的位置偏移@property (nonatomic, readwrite, assign) UIOffset titlePositionAdjustment;
//标题
@property(nullable, nonatomic,copy) NSString *title;
//图案
@property(nullable, nonatomic,strong) UIImage *image;
//横屏时的图案
@property(nullable, nonatomic,strong) UIImage *landscapeImagePhone;
//图案位置偏移
@property(nonatomic) UIEdgeInsets imageInsets;
//横屏时的图案位置偏移
@property(nonatomic) UIEdgeInsets landscapeImagePhoneInsets ;
//设置和获取标题的字体属性
- (void)setTitleTextAttributes:(nullable NSDictionary<NSString *,id> *)attributes forState:(UIControlState)state; - (nullable NSDictionary<NSString *,id> *)titleTextAttributesForState:(UIControlState)state;