定制使UITabBarController的tabbar选中tabbaritem时不高亮以及换...

(注：IOS5有新的API可以实现这些功能，这里这样搞是为了支持IOS4.)

 /*
  * @brief 定制的tabbar.
  */

 #import <UIKit/UIKit.h>

 @interface XUTabBarController : UITabBarController
 {
 @private
     UIView * bgView4TabBar_;
 }

 @end

/*
 * @brief 定制的tabbar.
 */

#import <UIKit/UIKit.h>

@interface XUTabBarController : UITabBarController
{
@private
    UIView * bgView4TabBar_;
}

@end

 #import "XUTabBarController.h"


 @interface XUTabBarController()
 @property(nonatomic, retain) UIView * bgView4TabBar;
 - (void)customTabBarBackgroundColor;
 - (void)setNoHighlightTabBar;
 @end

 @implementation XUTabBarController
 @synthesize bgView4TabBar = bgView4TabBar_;

 - (void)dealloc
 {
     [bgView4TabBar_ release];
     [super dealloc];
 }

 - (void)viewDidLoad
 {
     [super viewDidLoad];
     [self customTabBarBackgroundColor];
 }

 - (void)viewDidUnload
 {
     [super viewDidUnload];
     self.bgView4TabBar = nil;
 }

 #pragma mark - For iPad Rotate

 - (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
 {
     if(UIU_IsIPad)
     {
         CGRect appFrame = [[UIScreen mainScreen] applicationFrame];
         CGRect frame = self.tabBar.frame;
         frame.origin.x = 0;
         frame.origin.y = 0;
         frame.size.width = (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft
                             || toInterfaceOrientation == UIInterfaceOrientationLandscapeRight)
         ? /*横屏*/ appFrame.size.height + 20
         : appFrame.size.width + 20;
         self.bgView4TabBar.frame = frame;
     }
 }

 - (void)viewWillAppear:(BOOL)animated
 {
     [super viewWillAppear:animated];

     //
     [self willRotateToInterfaceOrientation:self.interfaceOrientation duration:0];
 }

 #pragma mark - NoHighlightTab

 - (void)setSelectedIndex:(NSUInteger)index
 {
     [super setSelectedIndex:index];
     [self setNoHighlightTabBar];
 }

 - (void)setSelectedViewController:(UIViewController *)selectedViewController
 {
     [super setSelectedViewController:selectedViewController];
     [self setNoHighlightTabBar];
 }

 - (void)setNoHighlightTabBar
 {
     int tabCount = [self.viewControllers count] > 5 ? 5 : [self.viewControllers count];
     NSArray * tabBarSubviews = [self.tabBar subviews];
     for(int i = [tabBarSubviews count] - 1; i > [tabBarSubviews count] - tabCount - 1; i--)
     {
         for(UIView * v in [[tabBarSubviews objectAtIndex:i] subviews])
         {
             if(v && [NSStringFromClass([v class]) isEqualToString:@"UITabBarSelectionIndicatorView"])
             {//the v is the highlight view.
                 [v removeFromSuperview];
                 break;
             }
         }
     }
 }

 #pragma mark - Custom TabBar Background Color

 - (void)customTabBarBackgroundColor
 {
     ///给tabbar换背景色
     //
     //frame
     CGRect appFrame = [[UIScreen mainScreen] applicationFrame];
     CGRect frame = self.tabBar.frame;
     frame.origin.x = 0;
     frame.origin.y = 0;
     frame.size.width = (self.interfaceOrientation == UIInterfaceOrientationLandscapeLeft
                         || self.interfaceOrientation == UIInterfaceOrientationLandscapeRight)
     ? /*横屏*/ appFrame.size.height + 20
     : appFrame.size.width + 20;

     //bg color.
     #define useTintColor 1
     #if useTintColor
     self.bgView4TabBar = [[[UINavigationBar alloc] initWithFrame:frame] autorelease];
     ((UINavigationBar *)self.bgView4TabBar).tintColor = XX_TabBgColor;
     #else
     self.bgView4TabBar = [[[UIView alloc] initWithFrame:frame] autorelease];
     self.bgView4TabBar.backgroundColor = XX_TabBgColor;
     #endif
     //add to.
     [self.tabBar insertSubview:self.bgView4TabBar atIndex:
      self.tabBar.subviews.count - (self.viewControllers.count > 5 ? 5 : self.viewControllers.count)
      ];
 }

 @end