iOS 开发中tabBarItem不显示文字，只显示图片，且图片居中显示

    //第一页

    HomePageViewController *homePageVC = [[HomePageViewController alloc] init];

    UINavigationController *naviVC1 = [[UINavigationController alloc] initWithRootViewController:homePageVC];

    homePageVC.tabBarController.tabBar.tintColor = [UIColor redColor];

    homePageVC.tabBarItem = [[UITabBarItem alloc] initWithTitle:nil image:[UIImage imageNamed:@"icon_star@3x"] selectedImage:[[UIImage imageNamed:@"icon_star@2x"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];

    //homePageVC.title = @"首页";

    

    //tabBar图片居中显示，显示文字的坐标

    CGFloat offset = 5.0;

    //tabBar图片居中显示，不显示文字

    homePageVC.tabBarItem.imageInsets = UIEdgeInsetsMake(offset, 0, -offset, 0);