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大部分iOS的app都会用到tabBar，创建代码也都差不多，贴出代码，方便写新项目时过来粘贴代码

#import "MainTabBarViewController.h"

#import "HomeViewController.h"

#import "ClassifyViewController.h"

#import "ShoppingCartViewController.h"

#import "MeViewController.h"

@interface MainTabBarViewController ()

@end

@implementation MainTabBarViewController

- (void)viewDidLoad {

    [superviewDidLoad];

    // Do any additional setup after loading the view.

    self.view.backgroundColor = [UIColorwhiteColor];

    [selfcreateViewControllers];

    

    [selfcreateItems];

}

- (void)createViewControllers

{

    UINavigationController * nc1 = [[UINavigationControlleralloc] initWithRootViewController:[[HomeViewControlleralloc] init]];

    UINavigationController * nc2 = [[UINavigationControlleralloc] initWithRootViewController:[[ClassifyViewControlleralloc] init]];

    UINavigationController * nc3 = [[UINavigationControlleralloc] initWithRootViewController:[[ShoppingCartViewControlleralloc] init]];

    UINavigationController * nc4 = [[UINavigationControlleralloc] initWithRootViewController:[[MeViewControlleralloc] init]];

    self.viewControllers =@[nc1,nc2,nc3,nc4];

}

- (void)createItems

{

    NSArray *titleArray = @[@"首页",@"商品分类",@"购物车",@"我"];

    NSArray *selectImageName =@[@"img_main_homepage_unselected.png",@"img_main_classification_unselected.png", @"img_main_shoppingcart_unselected.png", @"img_main_personal_unselected.png"];

    NSArray *unselectImageName =@[@"img_main_homepage_unselected.png",@"img_main_classification_unselected.png", @"img_main_shoppingcart_unselected.png", @"img_main_personal_unselected.png"];

    for (int i =0; i < titleArray.count; i++) {

        //需要对图片进行单独处理

        UIImage *selectImage = [UIImageimageNamed:selectImageName[i]];

        selectImage = [selectImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

        UIImage *unselectImage = [UIImageimageNamed:unselectImageName[i]];

        unselectImage = [unselectImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

        //以上是防止在bar上显示为阴影而不是图片

        UITabBarItem *item = self.tabBar.items[i];

        item.selectedImage = selectImage;

        item.image = unselectImage;

        item.title = titleArray[i];

    }

    [self.tabBarsetBackgroundImage:[UIImageimageNamed:@"img_tabBar_bg_iOS8.png"]];

    [[UITabBarItemappearance] setTitleTextAttributes:@{

NSForegroundColorAttributeName : [UIColorredColor]}forState:UIControlStateSelected];

    [[UITabBarItemappearance] setTitleTextAttributes:@{

NSForegroundColorAttributeName : [UIColordarkGrayColor]}forState:UIControlStateNormal];

}

- (void)didReceiveMemoryWarning {

    [superdidReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

/*

#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    // Get the new view controller using [segue destinationViewController].

    // Pass the selected object to the new view controller.

}

*/

@end