我有5个标签,想要在用户选择某个快速操作时转到特定标签。
但是,我尝试过使用通知中心,引用主视图控制器并引用应用程序委托中的选项卡,但似乎都没有。 tabbar.selectedIndex方法确实被调用,但由于某些原因,使用快速操作时选项卡不会更改。
@available(iOS 9.0, *)
func application(application: UIApplication, performActionForShortcutItem shortcutItem: UIApplicationShortcutItem, completionHandler: (Bool) -> Void) {
let revealVC = self.window!.rootViewController as! SWRevealViewController
let tabVC = revealVC.childViewControllers[1] as! UITabBarController
let navVC = tabVC.viewControllers![0] as! UINavigationController
let shopVC = navVC.viewControllers[0] as! BrowseVC
switch shortcutItem.type {
case "com.modesens.search" :
tabVC.selectedIndex = 0
//referencing method to go to tab in base view controller also doesn't work...
//shopVC.goToSelectTab (0)
completionHandler(true)
//notification center method gets called but tab actually doesn't change
//NSNotificationCenter.defaultCenter().postNotificationName("goToTab", object: nil, userInfo: ["tabIndex":0])
default:
print("no work")
}
completionHandler(false)
}
revealVC是父级,tabVC是revealVC的子级,则navVC是tab的子级。
同样,我尝试使用notificationCenter并引用shopVC,然后调用此方法:
答案 0 :(得分:1)
最近,我使用SWRevealVC库实现了主屏幕快速操作。所以,我很高兴告诉你如何解决这个问题。
1)以编程方式创建SWRevealVC(不在故事板中)
如果您有5个标签,并且想要快速操作另一个标签页, 您应该动态更改SWRevealVC的frontVC以响应快速操作。
UIWindow *window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window = window;
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
UINavigationController *frontViewController = [storyboard instantiateViewControllerWithIdentifier:@"mainNaviVC"];
SideMenuViewController *rearViewController = [storyboard instantiateViewControllerWithIdentifier:@"sideMenuVC"];
SWRevealViewController *mainRevealController = [[SWRevealViewController alloc]
initWithRearViewController:rearViewController
frontViewController:frontViewController];
self.window.rootViewController = mainRevealController;
2)在 didFinishLaunchingWithOptions 方法中实现逻辑
正如Apple提到的那样,如果您想要更改第一页,它是 didFinishLaunchingWithOptions 中快速操作逻辑的最佳位置。 在我的情况下, performActionForShortcutItem 仅被调用来处理应用程序的背景。(你应该在 didFinishLaunchingWithOptions 中返回NO以处理 didFinishLaunchingWithOptions 中的快速操作)< / p>
if ([shortcutItem.type isEqualToString:shortcutAroundStop]) {
handled = YES;
UINavigationController *frontViewController = [storyboard instantiateViewControllerWithIdentifier:@"naviStopAroundVC"];
SideMenuViewController *rearViewController = [storyboard instantiateViewControllerWithIdentifier:@"sideMenuVC"];
SWRevealViewController *mainRevealController = [[SWRevealViewController alloc]
initWithRearViewController:rearViewController
frontViewController:frontViewController];
self.window.rootViewController = mainRevealController;
[self.window makeKeyAndVisible];
}
我为你做了一个示例项目(objective-c)。我希望它能解决你的问题。