创建TabBar

-(void)creatTabBarView
{
    NSArray *imgArray=@[];
    NSArray *selectImage=@[];

    NSArray *names=@[];
    for (int i=0; i<names.count; i++) 
　　{
        //Class 为类的泛型，泛指任意类，id为对象的泛指
        Class class=NSClassFromString(names[i]);
        UIViewController *root=[[class alloc] init];

        [self addChlildVc:root imageName:imgArray[i] selectedImageName:selectImage[i]];
    }
}
// 给 tabBar 设置图片
- (void)addChlildVc:(UIViewController *)childVc imageName:(NSString *)imageName selectedImageName:(NSString *)selectedImageName
{

    // 设置图标
    UIImage *image = [UIImage imageNamed:imageName];
    image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    childVc.tabBarItem.image = image;

    // 设置选中的图标
    UIImage *selectedImage = [UIImage imageNamed:selectedImageName];
    selectedImage = [selectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    childVc.tabBarItem.selectedImage = selectedImage;

    //解决7.1版本图标不自适应
    if ([UIParam getIOSVersion] <= 7.1) {
        childVc.tabBarItem.imageInsets = UIEdgeInsetsMake(30, 42, 18, 42);
    }

    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:childVc];
    [self addChildViewController:nav];
}