Swift share variable appdelegate full#
Swift share variable appdelegate code#

) and UI Lifecycle ( Entered Foreground, Became Active … ) methods. Before iOS version 13, the AppDelegate class manages all the iOS app’s life cycle methods, that includes Process Lifecycle ( App Launched, App Terminated.Difference Between AppDelegate & SceneDelegate Class Life Cycle Methods In Xcode 11 iOS 13. This article will show you an example of how the SceneDelegate class manages the iOS app UI Life cycle functions.ġ. It defines a SceneDelegate class in the SceneDelegate.swift file, and this class takes over some UI life cycle functions which are implemented by AppDelegate class before.

If (.systemVersion floatValue] <6.When you create an iOS 13 project in Xcode 11 use a single view app template, you will find Xcode 11 add a SceneDelegate.swift file automatically beside the AppDelegate.swift file. Determine the system version, Select page loading method = login //Configure the rootViewController instance of the window window LoginViewController *login = bundle:nil] //The first page that needs to be displayed to initialize the application system (usually ViewController) Self.window = initWithFrame: bounds]] //Display window configuration

You can use the following code snippet to complete: (AppDelegate has UIWindow *window instance variables by default) Generally, the application system window (program display window) configuration is required in the agent interface to complete the page pop-up effect. System startup agent (loading of the first page)Īpplication didFinishLaunchingWithOptions:(NSDictionary *)launchOptions Therefore, variables that need to be used globally can be defined in AppDelegate.h. Global variableĪppDelegate can be called in the entire application, and in other pages, you can use code snippets to get AppDelegate's global variables: AppDelegate *appDelegate= delegate] applicationWillTerminate:(UIApplication *)application//A delegate call to be executed when the application is about to exit completely.

applicationDidBecomeActive:(UIApplication *)application//After the application has been activated, the delegate call to be executed corresponds to the applicationDidEnterBackground method. applicationWillEnterForeground:(UIApplication *)application//When the application is about to enter the foreground (being activated), the delegate call to be executed corresponds to the applicationWillResignActive method.

So if you want to set the background to continue running, just set it in this function. applicationDidEnterBackground:(UIApplication *)application//The delegate call to be executed when the application has entered the background program.

The file where the interface is located, common interfaces are: application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions//After the application is started, the delegate to be executed calls applicationWillResignActive:(UIApplication *)application//When the application will switch from the active state to the inactive state Execution of delegate calls, such as pressing the home button to return to the home screen, or switching applications between full screens. What is AppDelegate? AppDelegate is a proxy for the entire application, providing similar monitoring interfaces such as program startup and exit. After the application is created, there are AppDelegate.h and AppDelegate.m files by default.

Swift share variable appdelegate code#

Swift share variable appdelegate full#