Question

I have a simple delegate test, but for some reason it doesn’t get called.

I want to call -(void)test from AppDelegate class via delegate.

/// AppDelegate.h

#import <Cocoa/Cocoa.h>
@protocol AppDelegateDelegate
@required
-(void)test;
@end
@interface AppDelegate : NSObject <NSApplicationDelegate> {
    id<AppDelegateDelegate> _delegate;
}
@property(nonatomic, retain) id<AppDelegateDelegate> delegate;
@end

/// AppDelegate.m

#import "AppDelegate.h"
@implementation AppDelegate
@synthesize delegate = _delegate;
-(void)awakeFromNib {
    [_delegate test];
}
@end

/// test.h

#import <Foundation/Foundation.h>
#import "AppDelegate.h"
@interface test : NSObject <AppDelegateDelegate>
-(void)test;
@end

/// test.m

#import "test.h"
@implementation test
-(void)test {
    //this should be called from AppDelegate
    NSLog(@"delegate test");
}
@end

Answer 1

You are calling the delegate test method as soon as the AppDelegate class is loaded and no other class has had a chance to set themselves as the delegate. You need to call the delegate method after another class has had a chance to set itself as the delegate.

Also your delegate property should be defined as:

@property (assign) IBOutlet id <AppDelegateDelegate> delegate;