#uiapplication

[mahendra-yadav]

UIApplication and its Delegate

UIApplication and its Delegate

1. UIApplication :  root class UIResponder

A major role of your app’s application object is to handle the initial routing of incoming user events

he application object maintains a list of open windows (UIWindow objects) and through those can retrieve any of the app’s UIView objects

The UIApplication class defines a delegate that conforms to the UIApplicationDelegateprotocol and must implement…

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[iosengineering]

UIApplication

int main(int argc, char *argv[]) {     @autoreleasepool     {         return UIApplicationMain(argc, argv, nil, NSStringFromClass([MyAppDelegate class]));     } }

UIApplicationMain creates an instance of a class called UIApplication.

Every app has a UIApplication instance, which maintains the application's run loop, which executes indefinitely, until the application terminates.

Before the run loop begins, the app calls application:didFinishLaunchWithOptions, to create any Views, Controllers, and other objects that need to be ready before it starts.