Why is NSObject ini event triggered 2 times?

I have an NS开发者_StackOverflowObject

#import <Cocoa/Cocoa.h>

#import "MyAppDelegate.h"

@interface MyObj1 : NSObject<NSApplicationDelegate> {

}



@end

//
//  MyObj1.m


#import "MyObj1.h"


@implementation MyObj1


-(id)init;
{
    //I set the breakpoint here

}

@end

I set the breakpoint as above, but I found that it always triggers ini event 2 times

I do not know if it is normal or anything wrong?

Welcome any comment

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There's an easy way to find out: Just look at the stack trace in the debugger, and you will see how both objects are created. There are certainly two of them, maybe one within a nib and one programmatically. Typically, you never instantiate your app delegate yourself directly.