Calling function in the first view from the other viewcontroller

[mp43819]

Hello everyone, I hope that you will succeed in at least a little to clarify me how and what to do, I'm sure I'm wrong, so I really need an expert opinion. I have two viewcontroller together with nibs what I want is to call function that is in first class from another ViewController, the problem is that another viewcontroller manages to call this function but the only thing I can see that is done is NSlog which outputs in the console (which I put in that position to know that the function is called)

example:
FirstViewController.m

    -(void)drawingFunction:(NSString*)inputText{
NSLog("Feature was launched");
/* showing stuff in FirstView.xib */
}

SecondViewController.m

-(void)turnOnFunction:(id)sender{
FirstViewController *stuff= [[PrviViewController alloc] init];
[stuff drawingFunction:@"ShowAll"];
}

Basically when I call that function in the PrviViewController.m meaning without reference to the outside e.g.

[self drawingFunction:@"ShowAll"];

everything is well displayed, but when I try to call this function from SecondViewController.m all I see is just a "feature was launched" on the console

I really don't know what to do ...

[bytor99999]

I am assuming that the first view controller is created first and probably creates the second view controller. So in the second view controller create an iVar/property to hold a reference to the first view controller. I do that all the time.

If the first and second view controllers are unrelated. Meaning one not being a subview or one creates the other, then I would not put the method in either of the view controller, but in some other shared NSObject class that you create, like a helper class. I do that all the time too.

Mark

[mp43819]

The point is such that it was initially FirstViewController and its NIB and later expand of the applications needed for a new view with corresponding class to control things (specifically in the new class there are UISwitches that turns on and turnsoff a specific functions in FirstView)

If you have any suggestion to make it painlessly or on more elegant way I am open to all suggestions. (Thanks for the post above)

[bytor99999]

Originally Posted by mp43819

The point is such that it was initially FirstViewController and its NIB and later expand of the applications needed for a new view with corresponding class to control things (specifically in the new class there are UISwitches that turns on and turnsoff a specific functions in FirstView)

If you have any suggestion to make it painlessly or on more elegant way I am open to all suggestions. (Thanks for the post above)

Like above, I would just have the second view have a reference to the first view.

@interface MySecondViewController {
MyFirstViewController *firstViewController;
}

@property (nonatomic, retain) MyFirstViewController *firstViewController;

now you can call methods on firstViewController from the second view controller.

Mark

[justagruvn]

Mark,

thanks for the input. I am having the same issue. In a related question..

If you have a "FirstLevelViewController" .h and .m class that a navigation controller loads on startup... what is the name of the FirstLevelViewController instance?? Is it firstLevelViewController with the first letter uncapitalized?

Thank you. Very helpful information. Oh shucks.. one other question... Say you wanted to make a very basic (not core data) data class with only one instance and this stored your data and your first and second level view controllers updated.. Where would you initialize that object? In app delegate?? how would you give these same references to the view controllers?

Thanks bunches!

Michael

[famictech2000]

Originally Posted by bytor99999

Like above, I would just have the second view have a reference to the first view.

@interface MySecondViewController {
MyFirstViewController *firstViewController;
}

@property (nonatomic, retain) MyFirstViewController *firstViewController;

now you can call methods on firstViewController from the second view controller.

Mark

Hello

I coded my app with two viewcontrollers, and placed the code above that you stated but I cant seem to access the functions , if I had a function like :

- (IBAction)hideLeftScroll:(id)sender {
	leftScroll.hidden = YES;
	//debug only
	NSLog(@"Hide Left Scroll");
}

and wanted to access this function from the second vewcontroller what would I need to do!?