What is NSApplication?
NSApplication. shared() creates an object, then sets NSApp to point to it, and returns the object too. When NSApplicationMain is then called, the “Creates the application” effectively just calls NSApplication. shared() again, which returns the instance you created.
What is Nswindowcontroller?
A controller that manages a window, usually a window stored in a nib file.
What is NSMenu?
class NSMenu. An object that manages an app’s menus. protocol NSMenuDelegate. The optional methods implemented by delegates of NSMenu objects to manage menu display and handle some events.
What is UIApplication in Swift?
The UIApplication object provides the application-wide control and coordination for an iOS application. It’s responsible for handling the initial routing of incoming user events (touches, for example) as well as for dispatching action messages from control objects (such as buttons) to the appropriate target objects.
What is @UIApplicationMain?
@UIApplicationMain is an attribute applied to the class -declared below- AppDelegate, to provide more information about this class. In this case, the attribute @UIApplicationMain indicates that the class AppDelegate is the application delegate of your app.
How do I disable NSMenuItem?
If only you need is standard menu + some custom NSMenuItem s that can be disabled on your control, than you can just:
- Add one more menu node – just drag and drop Submenu Menu Item from Object library to your menu.
- Add all NSMenuItems you want to manage to this new Menu node.
What is AppDelegate and SceneDelegate?
The AppDelegate will be responsible for the application lifecycle and setup. The SceneDelegate will be responsible for what is shown on the screen (Windows or Scenes) handle and manage the way your app is shown.
What is AppDelegate lifecycle?
App delegate provides help to know the app’s current state. iOS Application Life Cycle depends on app delegate functions. iOS Application Life Cycle delegate provides control of the application. When we using core data then we should create a managed object of core data in the App delegate page.
What can MapKit do?
You can use the MapKit framework to:
- Embed maps directly into your app’s windows and views.
- Add annotations and overlays to a map for calling out points of interest.
- Provide text completion to make it easy for users to search for a destination or point of interest.
Is MapKit an API?
MapKit is a powerful API available on iOS devices that makes it easy to display maps, mark locations, enhance with custom data and even draw routes or other shapes on top.
What is entry point in Swift?
The entry point in a plain Swift module is the file in the module called main. swift . main. swift is the only file which is allowed to have expressions and statements at the top level (all other Swift files in the module can only contain declarations).
Do you have to override methods in NSApplication?
Generally, you subclass NSApplication to provide your own special responses to messages that are routinely sent to the global app object ( NSApp ). NSApplication doesn’t have primitive methods in the sense of methods that you must override in your subclass. Here are four methods that are possible candidates for overriding:
What do you need to know about NSApplication?
Every app uses a single instance of NSApplication to control the main event loop, keep track of the app’s windows and menus, distribute events to the appropriate objects (that’s, itself or one of its windows), set up autorelease pools, and receive notification of app-level events.
What happens when nsevent object is sent to NSApplication?
When a window object receives an NSEvent object from NSApp, it distributes it to the objects in its view hierarchy. NSApplication is also responsible for dispatching certain Apple events received by the app. For example, macOS sends Apple events to your app at various times, such as when the app is launched or reopened.
How does the shared method in NSApplication work?
The NSApplication object maintains a list of all the NSWindow objects the app uses, so it can retrieve any of the app’s NSView objects. The shared method also initializes the global variable NSApp, which you use to retrieve the NSApplication instance. shared only performs the initialization once.