Delegado de instancia compartida de AppDelegate
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15-11-2019 - |
Pregunta
MyAppDelegate *appD;
appD = [UIApplication sharedApplication];
if(appD.sw1.on)
NSLog(@"It is ON");
else
NSLog(@"It is OFF");
no da ningún error al compilar.Corre sin ninguna advertencia, pero no funciona.
No veo cuál es el problema.
...
Editar:
Dios mío, debería haber llamado método de delegado también:
appD = (MyAppDelegate *)[[UIApplication sharedApplication] delegate];
Solución
I recommend you this method to share the app delegate: https://coderwall.com/p/z4h4uw?i=2&p=1&q=&t%5B%5D=%21%21mine&t%5B%5D=%21%21bookmarks
Otros consejos
and instantiated an appDelegate …
No, you haven't instantiated anything, you've just declared a variable that can point to your app delegate. But you haven't assigned anything to that variable yet.
And instantiating another object would be wrong here since the app delegate instance already exists. You just have to reference the existing app delegate and assign it to your variable:
appD = (myAppDelegate *)[[UIApplication sharedApplication] delegate];
(Btw, you should follow the naming conventions. Class names should always begin with a capital letter.)