设置uitabbar的效果

http://www.cocoachina.com/bbs/simple/?t124524.html

下面的代码，对iOS (5.0 and later)有效。

// 设置TabBar的外貌

- (void)setTabBarAppearance

{

    UITabBar *tabBar = self.tabBarController.tabBar;

    // tabBar的整个背景条

    tabBar.backgroundImage = [UIImage imageNamed:@"底部bar"];

    // tabBar的单个tab的选择指示

    tabBar.selectionIndicatorImage = [UIImage imageNamed:@"底部bar_选中"];

    //

    // tabBar“选择”和“未选择”时的图片，带透明通道

    UIImage *selectedImage0 = [UIImage imageNamed:@"1_on"];

    UIImage *unselectedImage0 = [UIImage imageNamed:@"1_nm"];

    UIImage *selectedImage1 = [UIImage imageNamed:@"2_on"];

    UIImage *unselectedImage1 = [UIImage imageNamed:@"2_nm"];

    UIImage *selectedImage2 = [UIImage imageNamed:@"3_on"];

    UIImage *unselectedImage2 = [UIImage imageNamed:@"3_nm"];

    UIImage *selectedImage3 = [UIImage imageNamed:@"4_on"];

    UIImage *unselectedImage3 = [UIImage imageNamed:@"4_nm"];

    UIImage *selectedImage4 = [UIImage imageNamed:@"5_on"];

    UIImage *unselectedImage4 = [UIImage imageNamed:@"5_nm"];

    NSArray *selectedImageArray = [NSArray arrayWithObjects:

                                   selectedImage0,

                                   selectedImage1,

                                   selectedImage2,

                                   selectedImage3,

                                   selectedImage4,

                                   nil];

    NSArray *unselectedImageArray = [NSArray arrayWithObjects:

                                     unselectedImage0,

                                     unselectedImage1,

                                     unselectedImage2,

                                     unselectedImage3,

                                     unselectedImage4,

                                     nil];

    int count = [tabBar.items count];

    for (int i=0; i<count; ++i)

    {

        UITabBarItem *item = [tabBar.items objectAtIndex:i];

        [item setFinishedSelectedImage:[selectedImageArray objectAtIndex:i] withFinishedUnselectedImage:[unselectedImageArray objectAtIndex:i]];

        // 选中时的字体属性

        [item setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:

                                      [UIColor whiteColor], UITextAttributeTextColor,

                                      [UIFont systemFontOfSize:12.0], UITextAttributeFont,

                                      nil] forState:UIControlStateSelected];

        // 未选中时的字体属性

                                      [UIColor colorWithRed:0x3c/255.0 green:0x80/255.0 blue:0x1a/255.0 alpha:1.0], UITextAttributeTextColor,

                                      nil] forState:UIControlStateNormal];

    }

}