Tabbar项目图像问题

Question

我在tabbar中添加图片。 iamge大小为49px。添加工作正常。但布局有问题。所有tabbar项目图片的顶部都在tabbar的框架之外，并且有ablank空间向下。

如何解决这个问题？

这就是我创建Tabbar的方法

        localViewControllersArray = [[NSMutableArray alloc] initWithCapacity:3];


        myhomeVC = [[EventListView alloc] initWithNibName:@"EventListView_iPhone" bundle:nil];
        homeNavBar=[[UINavigationController alloc]initWithRootViewController:myhomeVC];
        homeNavBar.tabBarItem.title=nil;



        groupVC = [[ItineryView alloc] initWithNibName:@"ItineryView_iPhone" bundle:nil];
        groupNavBar=[[UINavigationController alloc]initWithRootViewController:groupVC];
        //groupNavBar.tabBarItem.title=@"";



        uploadVC = [[FilesView alloc] initWithNibName:@"FilesView_iPhone" bundle:nil];
        uploadNavBar=[[UINavigationController alloc]initWithRootViewController:uploadVC];
        //uploadNavBar.tabBarItem.title=@"";

        searchVC = [[PhotosView alloc] initWithNibName:@"PhotosView_iPhone" bundle:nil];
        searchNavBar=[[UINavigationController alloc]initWithRootViewController:searchVC];
        //searchNavBar.tabBarItem.title=@"";

        nearbyVC = [[AttendeesView alloc] initWithNibName:@"AttendeesView_iPhone" bundle:nil];
        nearbyNavBar=[[UINavigationController alloc]initWithRootViewController:nearbyVC];
        //nearbyNavBar.tabBarItem.title=@"";



        [localViewControllersArray addObject:homeNavBar];
        [localViewControllersArray addObject:groupNavBar];
        [localViewControllersArray addObject:uploadNavBar];
        [localViewControllersArray addObject:searchNavBar];
        [localViewControllersArray addObject:nearbyNavBar];



        appDelegate.tabBarController.viewControllers = localViewControllersArray;
        [self.parentViewController.view setHidden:YES];

        appDelegate.window.rootViewController = appDelegate.tabBarController;

并设置像这样的tabbar项目 -

  -(id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
   {
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
     if (self) {
        if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {

        [self.tabBarItem setFinishedSelectedImage:[UIImage imageNamed:@"navHomeHL.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"navHome.png"]];

       } }

       return self;
       }

Answer 1

试试这个......几天前我得到同样的问题，这段代码修好了。

UIViewController *viewController1, *viewController2,*viewController3;   
viewController1 = [[ViewController alloc] init];  
viewController2 = [[FormStatusViewController alloc] initWithNibName:@"FormStatusViewController" bundle:nil];   
viewController3 = [[DocumentsViewController alloc] init];  

UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:viewController1];   
UINavigationController *nav1 =[[UINavigationController alloc] initWithRootViewController:viewController2];
UINavigationController *nav2 =[[UINavigationController alloc] initWithRootViewController:viewController3];

nav.navigationBarHidden=YES;
nav1.navigationBarHidden=YES;
nav2.navigationBarHidden=YES;

NSArray *viewsArray = [[NSArray alloc] initWithObjects:nav,nav1,nav2, nil];
self.formTabBar= [[UITabBarController alloc] init];
[self.formTabBar setViewControllers:viewsArray];

UITabBar *tabBar = self.formTabBar.tabBar;
UITabBarItem *tabBarItem1 = [tabBar.items objectAtIndex:0];
UITabBarItem *tabBarItem2 = [tabBar.items objectAtIndex:1];
UITabBarItem *tabBarItem3 = [tabBar.items objectAtIndex:2];

tabBarItem1.title = @"FORM";
tabBarItem2.title = @"STATUS";
tabBarItem3.title = @"DOCUMENTS";

UIImage *tabBackground = [[UIImage imageNamed:@"tab_bg.png"]
                          resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)];
[[UITabBar appearance] setBackgroundImage:tabBackground];

if ([[[UIDevice currentDevice] systemVersion] floatValue] < 7) {
    [tabBarItem1 setFinishedSelectedImage:[UIImage imageNamed:@"form.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"form_h.png"]];
    [tabBarItem2 setFinishedSelectedImage:[UIImage imageNamed:@"status.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"status_h.png"]];
    [tabBarItem3 setFinishedSelectedImage:[UIImage imageNamed:@"documents.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"documents_h.png"]];
} else {
    tabBarItem1.selectedImage = [[UIImage imageNamed:@"form_h.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ];
    tabBarItem1.image = [[UIImage imageNamed:@"form.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ];

    tabBarItem2.selectedImage = [[UIImage imageNamed:@"status_h.png"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ];
    tabBarItem2.image = [[UIImage imageNamed:@"status.png"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ];

    tabBarItem3.selectedImage = [[UIImage imageNamed:@"documents_h.png"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ];
    tabBarItem3.image = [[UIImage imageNamed:@"documents.png"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ];


}
[[UITabBar appearance] setSelectionIndicatorImage:
[UIImage imageNamed:@"tab_select_indicator.png"]];
[[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                                   [UIColor whiteColor], UITextAttributeTextColor,nil] forState:UIControlStateNormal];

[[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                                   [UIColor whiteColor], UITextAttributeTextColor,nil] forState:UIControlStateHighlighted];

希望这会对你有所帮助