RDVTabBarController--可自由定制的iOS底部导航控件

• 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

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

• 设置角标数

objective-c [[self rdv_tabBarItem] setBadgeValue:@"3"];

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

``` objective-c
/**

• 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...

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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