TabBar上的图像显示不正确..在顶部显示了额外的一行-更新 [英] Image on TabBar Not displaying properly.. shows an extra line on top - UPDATED

问题描述

我已经添加了一个ImageView作为TabBar(具有三个NavigationControllers)的子视图.当我点击tabBarController的任何选项卡时，imageView上的Image也会相应更改(该图像显示该特定选项卡处于选中状态，而其他选项卡未被选中).

I have added an ImageView as a subview of my TabBar (that has three NavigationControllers). When i tap on any of the tabs of the tabBarController, then the Image on the imageView changes accordingly (the image shows that particular tab selected and others unselected).

但是，图像始终在tabBar上显示额外的一行.看起来它超出了tabBar的限制.我的图像尺寸为320x64像素(对于非视网膜iPhone)和640x128像素(对于视网膜iPhone).

However, the image always shows an extra line on the tabBar. It looks like it crosses the limit of the tabBar. The dimensions of my image is 320x64 pixels (for non-retina iPhone) and 640x128 pixels (for retina iPhone).

这是我为图像视图和tabBarController声明实例var的方式.

Here's how i am declaring instance var for the image view and the tabBarController.

@interface HomePageViewController ()<UITabBarControllerDelegate>
{
    UIImageView* tabBarView;
    UITabBarController *tabBarController;
}




-(UITabBarController *) configureTheTabBarControllerWithNavControllerAtIndex:(NSInteger)index
{

    UINavigationController *customerCareNavController;
    UINavigationController *accAndContactsNavController;
    UINavigationController *purchaseOrderNavController;

    CustomerCareViewController *custCareVC;
    PurchaeOrderViewController *POController;
    AccountsAndContactsViewController *accAndContactsController;


        custCareVC = [[CustomerCareViewController alloc] initWithNibName:@"CustomerCareViewController_iPhone" bundle:NULL];
        POController = [[PurchaeOrderViewController alloc] initWithNibName:@"PurchaeOrderViewController_iPhone" bundle:NULL];
        accAndContactsController = [[AccountsAndContactsViewController alloc] initWithNibName:@"AccountsAndContactsViewController_iPhone" bundle:NULL];

    customerCareNavController = [[UINavigationController alloc] initWithRootViewController:custCareVC];

    purchaseOrderNavController = [[UINavigationController alloc] initWithRootViewController:POController];

    accAndContactsNavController = [[UINavigationController alloc] initWithRootViewController:accAndContactsController];

    tabBarController = [[UITabBarController alloc] init];

    tabBarController.viewControllers = [NSArray arrayWithObjects:customerCareNavController,accAndContactsNavController,purchaseOrderNavController, nil];

    switch (index) {
        case 0:
            tabBarController.selectedIndex = 0;
            break;

        case 1:
            tabBarController.selectedIndex = 1;
            break;

        case 2:
            tabBarController.selectedIndex = 2;
            break;
    }

    tabBarView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"tab_mypeople.png"]];

    tabBarView.frame = CGRectMake(0, -15, 320, 64);

    [tabBarController.tabBar addSubview:tabBarView];

    tabBarController.delegate = self;

    [self selectTabBarIndex:index];

    [self presentViewController:tabBarController animated:YES completion:NULL];

    return tabBarController;
}

-(void)tabBarController:(UITabBarController *)TBController didSelectViewController:(UIViewController *)viewController
{
    NSUInteger indexSelected = [[TBController viewControllers] indexOfObject:viewController];
    [self selectTabBarIndex:indexSelected];
}

- (void) selectTabBarIndex:(NSInteger)index
{
    switch (index)
    {
        case 0:
            tabBarView.image=[UIImage imageNamed:@"tab_myCalendar.png"];
            break;
        case 1:
            tabBarView.image=[UIImage imageNamed:@"tab_myDetails.png"];
            break;
        case 2:
            tabBarView.image=[UIImage imageNamed:@"TabBarItem_PO.png"];
            break;
    }
}

请查看屏幕截图.

将barStyle设置为黑色会给我以下结果

Setting the barStyle as black gives me the following result

这条线已经消失了一点，但是仍然可见.

The line has faded a little, but is still visible..

推荐答案

嘿，我尝试了一些方法，并且有效

Hey i tried something and it works

tabBarView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"tab_mypeople.png"]];

    tabBarView.frame = CGRectMake(0, 0, 320, tabBarController.tabBar.frame.size.height);

但是，图像显示了一些拉伸..

However, the image shows a little stretched..

不作任何拉伸就写出来:这就像一个护身符.！！

tabBarController.tabBar.backgroundImage = [UIImage new];
tabBarController.tabBar.shadowImage = [UIImage new];

tabBarView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"tab_mypeople.png"]];
tabBarView.frame = CGRectMake(0, -15, 320, 64);
[tabBarController.tabBar addSubView:tabBarView];

这篇关于TabBar上的图像显示不正确..在顶部显示了额外的一行-更新的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！