自定义UITabBarController和UINavigationController [英] Custom UITabBarController and UINavigationController
问题描述
我正在开发iOS5及以上版本的应用程式,我不使用故事板或IB。我创建了一个自定义 UITabBarController
和在我的 AppDelegate
我把它4个视图控制器只有1 UINavigationController
(不能告诉为什么)。
I'm developing an app for iOS5 and up and I don't use storyboards or IB. I'm creating a custom UITabBarController
and in my AppDelegate
I'm putting in it 4 view controllers with only 1 UINavigationController
(can't tell why).
这会导致一个行为,其中我只能从首先选项卡推送新的VC,这显然是打包成 UINavigationController
navController
:
It results in a behaviour where I can push new VC only from the first tab, which is apparently, packed into a UINavigationController
called navController
:
SGTabBarController *tabBarController = [[SGTabBarController alloc] init];
SGHomeViewController* vc1 = [[SGHomeViewController alloc] init];
SGChooseOSAgainViewController* vc3 = [[SGChooseOSAgainViewController alloc] init];
SGSmsServicesViewController* vc4 = [[SGSmsServicesViewController alloc] init];
SGSupportViewController *vc5 = [[SGSupportViewController alloc] init];
navController = [[UINavigationController alloc] initWithRootViewController:vc1];
NSArray* controllers = [NSArray arrayWithObjects:navController, vc3, vc4, vc5, nil];
tabBarController.viewControllers = controllers;
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.rootViewController = tabBarController;
[navController setNavigationBarHidden:YES animated:NO];
[self.window makeKeyAndVisible];
为什么?我应该为每个标签创建一个单独的 UINavigationController
?我从Apple的文档中获取了这些代码。
Why is that? Should I create a separate UINavigationController
for each tab? I took this code from Apple's documentation.
推荐答案
是的,可以。在你的UITabBarController.m中尝试类似下面的代码
:
Yes, you can. Try something like this code in yourUITabBarController.m:
- (void)viewDidLoad
{
[super viewDidLoad];
NSMutableArray* sectionViewControllers = nil;
NSArray* controllers = [self controllers];
UIViewController* controller = nil;
for (controller in controllers)
{
if (sectionViewControllers == nil)
sectionViewControllers = [NSMutableArray arrayWithCapacity:0];
UINavigationController* navigationController = [[UINavigationController allocWithZone:[self zone]] initWithRootViewController:controller];
navigationController.navigationBarHidden = YES;
[sectionViewControllers addObject:navigationController];
[navigationController release];
}
self.viewControllers = sectionViewControllers;
}
- (NSArray*)controllers
{
if (!_controllers)
_controllers = [NSArray arrayWithObjects:[self tabController1], [self tabController2], nil];
return _controllers;
}
这在AppDelegate.m中:
and this in you AppDelegate.m:
self.window.rootViewController = self.yourUITabBarController;
这篇关于自定义UITabBarController和UINavigationController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!