uiapplicationdelegate

问题 Wow, I gave a big thought on the question! So I have a view Controller called "ContentView" within another view Controller (Main VC). The Main VC has a Navigation Controller which was created using Storyboards. And the contentView loads 3 different view controllers (vc1, vc2 and vc3) depending on the options that a Segmented Control has. So the question now is: How can I load a new View Controller from the button within one of the subviews (vc2) that will appear once the user selects the

问题 I am using iOS7 and I am trying to determine if I can get the JSON payload in the following situation. I have background mode "remote-notifications" enabled The push notification is received while the app is terminated The app is launched manually from the icon not from the notification center When I launch the app from the icon itself after the notification has been received I do not get the push in the launch options from - (BOOL)application:(UIApplication *)application

问题 when i launch my application in iphone emulator, it goes without any problem. If i launch on device it will crash as still as i open it. But when i launch emulator it says that problem: Applications are expected to have a root view controller at the end of application launch wait_fences: failed to receive reply: 10004003 What can i do? This is my application delegate: .h : #import <UIKit/UIKit.h> @class TrovaChiaviViewController; @interface TrovaChiaviAppDelegate : NSObject

问题 I want to lock users out of my app after a period of being in the background. I'm catching this in the the AppDelegate's applicationWillEnterForeground (and comparing to time stored in applicationWillResignActive ). If less than the timeout period no action takes place. If more than the timeout period I call: [_navigationController popToRootViewControllerAnimated:NO]; which brings the user back to the root view. It works perfectly fine with one visual interruption. The prior view (that which

问题 Is it possible to change the UIApplication.delegate property at runtime to another class that implements the UIApplicationDelegate protocol so that from then on UIApplicationDelegate functions are called on the new class? 回答1: You can very simply change it with [UIApplication sharedApplication].delegate = instanceOfDifferentClass . 来源： https://stackoverflow.com/questions/28464515/possible-to-change-appdelegate-at-runtime

问题 This question already has answers here : iPhone: Detecting user inactivity/idle time since last screen touch (9 answers) Closed 5 years ago . I'd like to perform some methods before my app closes due to user inactivity (i.e., the screen going black and the phone locking when you haven't touched it for a while). What method(s) is/are called when this happens? I'm guessing: This method / these methods would be part of my AppDelegate class. This method / these methods would be analogous to -

问题 Subj. In iOS 5.x I have the next consequence of methods calling: -[UIViewController initWithCoder:] -[UIApplicationDelegate didFinishLaunchingWithOptions:] -[UIViewController viewDidLoad] -[UIViewController viewWillAppear:] -[UIViewController viewDidAppear:] But in iOS 6.x it's the next: -[UIViewController initWithCoder:] -[UIViewController viewDidLoad] -[UIViewController viewWillAppear:] -[UIApplicationDelegate didFinishLaunchingWithOptions:] -[UIViewController viewDidAppear:] So... what I

问题 According to the Apple Docs, in order to find out if a user tapped on your push notification you are supposed to check the applicationState in application:didReceiveRemoteNotification: If the value is UIApplicationStateInactive, the user tapped the action button; if the value is UIApplicationStateActive, the application was frontmost when it received the notification. I have found that this is not always true. For example: Double-tap the home button to reveal the system tray and enter "fast

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Show activity indicator during application launch All, Inside my app delegate, I created an animated splash view that uses my Default.png. That all works OK but I cannot figure out how get my ActivityIndicator to display on top of the splash view. It's there just hidden by the splash view. Here is what I have and thanks: - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary

问题 Any advice on where to store the main list data for an iPhone application like the following? NavigationController based Level 1 (main screen) is a List of Items. Hence it uses a table view (table of items) Level 2_EDIT: Is a view you can get to from the main screen by clicking EDIT. Here you can add text to be added to the main view list Level 2_DETAIL: Is a view you can get to from the main screen by clicking on a cell. Now assuming the implementation is (rough overview): * MainView -