TabBarController

1.两种方式创建系统TabBarController

-(id)init{

    self = [super init];

    if( self )

    { //newTask

        HSNewTaskViewController *newsTaskVc = [[HSNewTaskViewController alloc] init];

        [self addChildViewController:newsTaskVc title:@"新任务" normalImage:@"tabbar_NewTask_normal" selectImage:@"tabbar_NewTask_select"];

        //actioning

        HSProcessingViewController *actioningVc = [[HSProcessingViewController alloc] init];

        [self addChildViewController:actioningVc title:@"进行中" normalImage:@"tabbar_processing_normal" selectImage:@"tabbar_processing_select"];

        //completed

        HSCompletedViewController *completedVc = [[HSCompletedViewController alloc] init];

        [self addChildViewController:completedVc title:@"已完成" normalImage:@"tabbar_completed_normal" selectImage:@"tabbar_completed_select"];

    }

    return self;

}

/**

 *  添加一个子控制器

 *

 *  @param childVc           子控制器对象

 *  @param title             标题

 *  @param imageName         图标

 *  @param selectedImageName 选中的图标

 */

- (void)addChildViewController:(UIViewController *)childController title:(NSString *)title normalImage:(NSString *)normalImage selectImage:(NSString *)selectImage{

    childController.tabBarItem.title = title;

    [childController.tabBarItem setTitleTextAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:11.0]}

                                                       forState:UIControlStateNormal];

    [childController.tabBarItem setTitleTextAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:11.0],

                                                         NSForegroundColorAttributeName:[UIColor colorWithRed:/255.0 green:/255.0 
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　       blue:/255.0 alpha:1.0]}

                                                         forState:UIControlStateSelected];

    childController.tabBarItem.image = [[UIImage imageNamed:normalImage] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

    childController.tabBarItem.selectedImage = [[UIImage imageNamed:selectImage] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

    [self addChildViewController:childController];

//第二种添加方式
// self.viewControllers=@[c1,c2,c3,c4];

}