Obj-C Delegate inside Delegate - ios

Question

I have subclassed a view that I am using as header view it has some buttons delegate inside it and it works perfect .
However I am presenting a modalViewController above my viewController .
(in my modalViewController I have implemented the same header , and it does get the delegates from the header) but this view it self has to delegate to the previous viewController if the back button of the header is pressed.
I have made the same functions but my viewController never gets it's delegate... :(
I am quite new to Obj-C and I don't know maybe I am doing something illegal here.
here is the code of modalViewController trying to delegate to the previous viewController
#pragma mark - header delegate
- (void)header:(header *)header backbuttonPressed:(UIButton *)sender
{
if(header == logo)
{
NSLog(#"gotBackButtonDelegate");
//delete the items array
//_itemSourceArray = nil;
[delegate allEventsDrillPage:self backbuttonPressed:sender];
[self dismissViewControllerAnimated:YES completion:nil];
}
}
This delegate does triggers from the header view.
however in my previous viewController:
- (void)allEventsDrillPage:(allEventsDrillPage *)allEventsDrillPage backbuttonPressed:(UIButton *)sender //doesn't work :(
{
NSLog(#"got back delegate!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
// [self dismissViewControllerAnimated:YES completion:nil];
_drillPage = nil;
}
never get called
I calling the modalViewController like this:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[_allEventsTableView deselectRowAtIndexPath:indexPath animated:YES];
[self->_allEventsTableView setNeedsDisplay];
[self->_allEventsTableView reloadData];
_drillPage = [[allEventsDrillPage alloc]initWithDictionary:((NSDictionary*) [_tableDataSource objectAtIndex:indexPath.row])];
_drillPage.delegate = self;
[self presentViewController:_drillPage animated:YES completion:nil];
}
in its .h file I did
#interface allEvents : UIViewController <headerDelegate , UITableViewDataSource , UITableViewDelegate ,allEventsDrillPageDelegate>
I don't get what am I missing here :-/ can some1 take a look please ?
if needed more info I will added just ask for it.
EDIT:
protocol of delegate inside the modalViewController
#class allEventsDrillPage;
#protocol allEventsDrillPageDelegate //define delegate protocol
- (void)allEventsDrillPage:(allEventsDrillPage*)allEventsDrillPage backbuttonPressed:(UIButton*)sender;
#end
#interface allEventsDrillPage : UIViewController
{
id<allEventsDrillPageDelegate> __weak delegate;
....
}
#property (weak, nonatomic) id <allEventsDrillPageDelegate> delegate; //define

Answer 1

Let's try:
- (void)header:(header *)header backbuttonPressed:(UIButton *)sender
{
if(header == logo)
{
NSLog(#"gotBackButtonDelegate");
// delete the items array
//_itemSourceArray = nil;
// my comment: you should replace "delegate" to "_delegate"
// and it works. I tested. It's OK. Wow.
[_delegate allEventsDrillPage:self backbuttonPressed:sender];
[self dismissViewControllerAnimated:YES completion:nil];
}
}

Answer 2

nmh's answer is correct. I wrote up an answer earlier but his came in faster, so I thought I would take out the other parts and just add the explanations here.
You have this:
#interface allEventsDrillPage : UIViewController
{
id<allEventsDrillPageDelegate> __weak delegate;
....
}
#property (weak, nonatomic) id <allEventsDrillPageDelegate> delegate;
With this id<allEventsDrillPageDelegate> __weak delegate; you declare an ivar.
With this #property (weak, nonatomic) id <allEventsDrillPageDelegate> delegate; you are declaring a property.
Since Xcode 4.4 you get auto-synthesization.
And so this line:
_drillPage.delegate = self;
You are setting the one via the property.
And not this:
id<allEventsDrillPageDelegate> __weak delegate;
So what you have here:
[delegate allEventsDrillPage:self backbuttonPressed:sender];
You are using the ivar above, not the one via the property.
And delegate is thus nil.
And so, if you try to send a message to the delegate using nmh's solution or:
[self.delegate allEventsDrillPage:self backbuttonPressed:sender];
It should work as expected.
Addendum to dismissing modal view controller:
Instead of dismissing it from the current view controller, dismiss it from the one who presented it, so:
- (void)header:(header *)header backbuttonPressed:(UIButton *)sender
{
if(header == logo)
{
NSLog(#"gotBackButtonDelegate");
[_delegate allEventsDrillPage:self backbuttonPressed:sender];
//or self.delegate
}
}
And in:
- (void)allEventsDrillPage:(allEventsDrillPage *)allEventsDrillPage backbuttonPressed:(UIButton *)sender
{
NSLog(#"got back delegate!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
[self dismissViewControllerAnimated:YES completion:nil];
_drillPage = nil;
}
Or even better:
- (void)allEventsDrillPage:(allEventsDrillPage *)allEventsDrillPage backbuttonPressed:(UIButton *)sender
{
NSLog(#"got back delegate!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
[self dismissViewControllerAnimated:YES completion:^{
_drillPage = nil;
}];
}
Hope this helps.