CODEWITHSUNDEEP
iphonemodel-view-controllerdelegates
Jack BeNimble
Jack BeNimble

Reputation: 36693

iPhone mvc question

In a standard iPhone application, how is the delegate to the UIApplication class identified to the UIApplication? Is it the fact that the delegate identifies itself as following the protocol? Or is there some physical connection?

Upvotes: 1

Views: 81

Answers (3)

Till
Till

Reputation: 27597

Two options:

  • as described by Ole and Felz
  • in your main.m implementation file as drafted below
int main(int argc, char *argv[])  
{
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
    int retVal = UIApplicationMain(argc, argv, nil, @"MyCustomAppDelegate");
    [pool release];
    return retVal; 
}

Upvotes: 1

fsaint
fsaint

Reputation: 8759

The connection is created in "Main nib file base base name" xib (NSMainNibFile), as defined in your Info.plist. The UIApplication defined in that xib has a UIApplicationDelegate IBOutlet that will define the delegate to be used.

Upvotes: 1

Ole Begemann
Ole Begemann

Reputation: 135558

The connection is made in MainWindow.nib. The UIApplication instance loads this NIB file and thereby creates the application delegate (which is an object in the NIB) and connects it to its delegate outlet.

Upvotes: 1

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