A、 B 、C のTabBarController3 つのアプリを作成しました。プログラムですべてを作成しました。ここで、これらの TabBar アイテムの 1 つにいくつかの ViewController をプッシュしたいと考えています。ViewControllersUINavigationControllers
たとえば、ViewController B にいてボタンを 1 つ押すと、pushViewController を ViewController: D に作成し、DI で新しいボタンを押すと、新しい ViewController E に移動し、必要なときにいつでも戻ることができます。 NavigationController の戻るボタン。
問題は、D から B に戻ろうとすると、D と B の間に新しい空の ViewController があり、次のエラーが発生することです。
まず、私は B にいて、NEXT BUTTON を D に押します。
2013-10-30 01:00:07.076 Wplanet[11964:70b] nested push animation can result in corrupted navigation bar
2013-10-30 01:00:07.444 Wplanet[11964:70b] Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.
2013-10-30 01:00:07.582 Wplanet[11964:70b] Unbalanced calls to begin/end appearance transitions for <DViewController: 0x8aa7260>.
ここでアプリはクラッシュしません。
次に、私は D にいて、B に戻りたい (ナビゲーション バーの backButton で):
最初に戻るボタンを押すと、ナビゲーション バー (D と B の間) に新しい戻るボタンがある空の viewController が表示されます。次に、新しい BackButton を押すと、次のエラーでアプリがクラッシュします。
2013-10-30 01:03:54.790 Wplanet[12001:70b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't add self as subview'
*** First throw call stack:
(
0 CoreFoundation 0x01ce25e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x01a658b6 objc_exception_throw + 44
2 CoreFoundation 0x01ce23bb +[NSException raise:format:] + 139
3 UIKit 0x0083adfb -[UIView(Internal) _addSubview:positioned:relativeTo:] + 113
4 UIKit 0x0082e9b1 -[UIView(Hierarchy) addSubview:] + 56
5 UIKit 0x007c7766 __53-[_UINavigationParallaxTransition animateTransition:]_block_invoke + 1701
6 UIKit 0x008353ef +[UIView(Animation) performWithoutAnimation:] + 82
7 UIKit 0x007c6c96 -[_UINavigationParallaxTransition animateTransition:] + 1155
8 UIKit 0x00901e4e -[UINavigationController _startCustomTransition:] + 3446
9 UIKit 0x0090e0c7 -[UINavigationController _startDeferredTransitionIfNeeded:] + 688
10 UIKit 0x0090ecb9 -[UINavigationController __viewWillLayoutSubviews] + 57
11 UIKit 0x00a48181 -[UILayoutContainerView layoutSubviews] + 213
12 UIKit 0x0083e267 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 355
13 libobjc.A.dylib 0x01a7781f -[NSObject performSelector:withObject:] + 70
14 QuartzCore 0x045d52ea -[CALayer layoutSublayers] + 148
15 QuartzCore 0x045c90d4 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380
16 QuartzCore 0x045c8f40 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 26
17 QuartzCore 0x04530ae6 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 294
18 QuartzCore 0x04531e71 _ZN2CA11Transaction6commitEv + 393
19 QuartzCore 0x04532544 _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 92
20 CoreFoundation 0x01caa4ce __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
21 CoreFoundation 0x01caa41f __CFRunLoopDoObservers + 399
22 CoreFoundation 0x01c88344 __CFRunLoopRun + 1076
23 CoreFoundation 0x01c87ac3 CFRunLoopRunSpecific + 467
24 CoreFoundation 0x01c878db CFRunLoopRunInMode + 123
25 GraphicsServices 0x02ee59e2 GSEventRunModal + 192
26 GraphicsServices 0x02ee5809 GSEventRun + 104
27 UIKit 0x007d3d3b UIApplicationMain + 1225
28 Woowplanet 0x0000592d main + 141
29 libdyld.dylib 0x0258a70d start + 1
30 ??? 0x00000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
私はこれをやってみました：
appDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// TAB BAR CONTROLLER
UITabBarController *tabBarController = [[UITabBarController alloc] init];
AViewController *aVC = [[AViewController alloc] init];
// nombre tab abr controller
aVC.title = @"A";
UINavigationController *nav1 = [[UINavigationController alloc] initWithRootViewController:aVC];
nav1.navigationBar.topItem.title = nil;
BViewController *bVC = [[BViewController alloc] init];
bVC.title = @"bVC";
UINavigationController *nav2 = [[UINavigationController alloc] initWithRootViewController:sherpaVC];
nav2.navigationBar.topItem.title = nil;
CViewController *cVC = [[CViewController alloc] init];
cVC.title = @"cVC";
UINavigationController *nav3 = [[UINavigationController alloc] initWithRootViewController:cVC];
nav3.navigationBar.topItem.title = nil;
[tabBarController setViewControllers:@[nav1,nav2,nav3]];
[tabBarController setSelectedIndex:1];
self.window.rootViewController = tabBarController;
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
BViewController コード:
- (void)viewDidLoad
{
[super viewDidLoad];
UILabel *titleLbl = [[UILabel alloc] initWithFrame:CGRectMake(75, 75, 200, 14)];
[titleLbl setTextColor:UIColorFromRGB(0x7B2F19)];
[titleLbl setFont:[UIFont systemFontOfSize:14]];
[titleLbl setBackgroundColor:[UIColor clearColor]];
[titleLbl setText:@"I am in Bcontroller"];
[self.view addSubview:titleLbl];
UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(75, 175, 200, 14)];
[btn setBackgroundColor:[UIColor blueColor]];
[btn setTitle:@"Next" forState:UIControlStateNormal];
[btn addTarget:self action:@selector(next) forControlEvents:UIControlEventAllTouchEvents];
[self.view addSubview:btn];
}
-(void)next
{
DViewController *dVC = [[DViewController alloc] init];
[self.navigationController pushViewController:dVC animated:YES];
}