Ist dieses Java eine gute Annäherung an die Funktionsweise von @UIApplicationMain in Swift?

Question

ich die Automagic von @UIApplicationMain versuchen zu verstehen, und wie der Beginn eines iOS-App in Bezug auf Java zu visualisieren:

public class UIApplication extends UIResponder implements Runnable { 
    final UIApplicationDelegate appDel; 
    public UIApplication(UIApplicationDelegate appDel) { 
     this.appDel = appDel; 
    } 

    public static void main(String[] args) { 
     try { 
      UIApplication app = new UIApplication(new AppDelegate()); 

      handThisReferenceToOperatingSystem(app); 
      iOSdoesSomethingLikeThis(new Thread(app).start());  
     } catch(Exception e) { e.printStackTrace(); } 
    } 

    public void run() { 
     // chill-out and wait for iOS to invoke methods in UIResponder class. 
     // The UIResponder methods invoke my custom methods in AppDelegate. 
    } 

      public static class AppDelegate implements UIApplicationDelegate { 
       public void application(Object UIApplication) { // app specific behaviour 
       } 
       public void applicationWillResignActive(Object UIApplication) { // app specific behaviour 
       } 
       public void applicationDidEnterBackground(Object UIApplication) { // app specific behaviour 
       } 
       public void applicationWillEnterForeground(Object UIApplication) { // app specific behaviour 
       } 
       public void applicationDidBecomeActive(Object UIApplication) { // app specific behaviour 
       } 
       public void applicationWillTerminate(Object UIApplication) { // app specific behaviour 
       } 
       // maybe more methods from the UIApplicationDelegate 
      } 

      public interface UIApplicationDelegate { 
       void application(Object UIApplication); 
       void applicationWillResignActive(Object UIApplication); 
       void applicationDidEnterBackground(Object UIApplication); 
       void applicationWillEnterForeground(Object UIApplication); 
       void applicationDidBecomeActive(Object UIApplication); 
       void applicationWillTerminate(Object UIApplication); 
       // maybe some more methods .... 
      } 
} 

public class UIResponder { 
    void fingerSwipe() { // default implementation 
    } 
    void verticalMotion() { // default implementation 
    } 
    // more methods iOS might invoke 
} 

Also im Grunde macht das @UIApplicationMain Attribut auf die AppDelegate Klasse Anwendung aller andere Code weggehen, oder?

Answer 1

Schauen Sie sich diese Antwort: https://stackoverflow.com/a/24516329/335974

Der Kern ist, dass es die main.m Datei in Objective-C-Projekten gefunden erzeugt:

int main(int argc, char *argv[]) { 
    @autoreleasepool { 
     NSString *appDelegateClassName = @"AppDelegate"; 

     return UIApplicationMain(argc, argv, nil, appDelegateClassName); 
    } 
} 

Code sieht also Ihre Java wie im Baseballstadion von dem, was passiert.