保存和恢复为Tabbar没有故事板

Question

我使用iOS 6保存和恢复（没有故事板），它与导航控制器工作正常，但如果我手动添加Tabbar控制器在主窗口，我没有得到选择选项卡。

例如。

ListViewController *list = [[ListViewController alloc] initWithNibName:@"ListViewController" bundle:nil]; 
SettingViewController *setting = [[SettingViewController alloc] initWithNibName:@"SettingViewController" bundle:nil]; 

UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController:list]; 
navigation.restorationIdentifier = @"NavigationControllerID"; 

self.tabbar = [[UITabBarController alloc] init]; 
self.tabbar.restorationIdentifier = @"TabbarControllerID"; 
    self.tabbar.viewControllers = @[navigation,setting]; 

[[_tabbar.tabBar.items objectAtIndex:0] setTitle:NSLocalizedString(@"List", @"comment")]; 
[[_tabbar.tabBar.items objectAtIndex:1] setTitle:NSLocalizedString(@"Setting", @"comment")]; 

self.window.rootViewController = self.tabbar; 
[self.window makeKeyAndVisible]; 

在吨

他的情况下，我得到选择的每个再寄一次第一选项卡已经implatementd

+ (UIViewController *)viewControllerWithRestorationIdentifierPath:(NSArray *)identifierComponents coder:(NSCoder *)coder 

用于设置视图控制器。

Answer 1

通过的appDelegate

的NSString * const的AppDelegateRootVCKey = @ “AppDelegateRootVCKey” 添加此方法;

- (void)application:(UIApplication *)application willEncodeRestorableStateWithCoder:(NSCoder *)coder { 
//Adding last tabbar selected index 
[coder encodeObject:[NSString stringWithFormat:@"%d",self.tabbar.selectedIndex]forKey:AppDelegateRootVCKey]; 

}

- (BOOL)application:(UIApplication *)application shouldRestoreApplicationState:(NSCoder *)coder { 


//Setting Last tabbar selected index 
NSString *selectedStr = [coder decodeObjectForKey:AppDelegateRootVCKey]; 
self.tabbar.selectedIndex = [selectedStr intValue]; 

return YES; 

}