• RDVTabBarController：一个十分完善的tabBarController，可以自定义角标个数，爽的停不下来。

• RDVTabBarController地址：RDVTabBarController

• Demo地址：欢迎Star

说明

• 此教程是旨在让你快速入手，如需更加深层次的了解，请直接RDVTabBarController地址分析即可；

使用

pod 'RDVTabBarController'

建议直接CocoaPods管理，对CocoaPods有兴趣的童鞋可以戳cocoapods-install-usage

结构

RDVTabBar 
@interface RDVTabBar : UIView

RDVTabBarController
@interface RDVTabBarController : UIViewController 

RDVTabBarItem
@interface RDVTabBarItem : UIControl

RDVTabBarController Example Usage其实已经很详细了，接下来看初始化

 //VString宏定义，为了就是更好的国际化语言，适配多语言，刚好此Demo也国际化了，可以参看https://github.com/sauchye/dev_notes/issues/4 ?
#define VString(x)      NSLocalizedString(x, nil)

- (void)setupViewControllers{
    SYFirstViewController *firstVC = [[SYFirstViewController alloc] init];
    SYSecondViewController *secondVC = [[SYSecondViewController alloc] init];
    SYThirdViewController *thirdVC = [[SYThirdViewController alloc] init];
    firstVC.title = VString(@"Home");
    secondVC.title = VString(@"Found");
    thirdVC.title = VString(@"Me");
    self.firstNav = [[SYBaseNavigationController alloc] initWithRootViewController:firstVC];
    self.secondNav = [[SYBaseNavigationController alloc] initWithRootViewController:secondVC];
    self.thirdNav = [[SYBaseNavigationController alloc] initWithRootViewController:thirdVC];
    [self setViewControllers:@[self.firstNav, self.secondNav, self.thirdNav]];
    [self customizeTabBarForController];
}

- (void)customizeTabBarForController{

    //tabbar 背景图片 tabbar_background
    UIImage *backgroundImage = [UIImage imageNamed:@"tabbar_background"];
    //选项卡图片
    NSArray *tabBarItemImages;
      //这里添加tabBar icon图片
    //= @[VString(@"First"), VString(@"Second"),VString(@"Third")];

    NSArray *tabBarItemTitles = @[VString(@"Home"), VString(@"Found"), VString(@"Me")];
    NSInteger index = 0;
    for (RDVTabBarItem *item in [[self tabBar] items])
    {
        item.titlePositionAdjustment = UIOffsetMake(0, 2.0);
        [item setBackgroundSelectedImage:backgroundImage withUnselectedImage:backgroundImage];
        UIImage *selectedimage = [UIImage imageNamed:[NSString stringWithFormat:@"%@_selected",[tabBarItemImages objectAtIndex:index]]];

        UIImage *unselectedimage = [UIImage imageNamed:[NSString stringWithFormat:@"%@_normal",[tabBarItemImages objectAtIndex:index]]];

        [item setFinishedSelectedImage:selectedimage withFinishedUnselectedImage:unselectedimage];

        [item setTitle:[tabBarItemTitles objectAtIndex:index]];
        item.selectedTitleAttributes = @{
                                         NSFontAttributeName: [UIFont boldSystemFontOfSize:12],
                                         NSForegroundColorAttributeName:kNAVIGATION_BAR_COLOR,
                                         };
        item.unselectedTitleAttributes = @{
                                           NSFontAttributeName: [UIFont boldSystemFontOfSize:12],
                                           NSForegroundColorAttributeName:RGB(217, 217, 217),
                                           };

        [item setTitle:[tabBarItemTitles objectAtIndex:index]];
        index++;

    }
}

这样你的tabBar基本搭建好了，但是还需要完善一些，比如，角标设置，push隐藏等。

• Push隐藏tabBar，你只需要这样即可

  - (void)viewWillAppear:(BOOL)animated{
      [super viewWillAppear:animated];
      [[self rdv_tabBarController] setTabBarHidden:YES animated:YES];
  }

• 设置角标数

   [[self rdv_tabBarItem] setBadgeValue:@"3"];

• RDVTabBarControllerDelegate，相信你看就会明白，好的方法命名很重要啊~

  /**
   * Asks the delegate whether the specified view controller should be made active.
   */
  - (BOOL)tabBarController:(RDVTabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController;
  
  /**
   * Tells the delegate that the user selected an item in the tab bar.
   */
  - (void)tabBarController:(RDVTabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController;

• 还有需要多等待你去发现…

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结语

RDVTabBarController是一个很棒的第三方tabBarController，值得我们学习和思考。

• 相比传统第三方，你会发现可以很好的定制角标，这是极好的，当然你也可以自定义；

• 但是不能定义中间凸起的tabBar，好早之前去哪儿就是中间凸起一个tabBar，不过现在去哪儿也改成传统的tabBar了；

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