How to access objects from different classes in Cocoa Programming

Question

I have an NSTextField subclass (called "txtField1" and used as Custom Class for a Text Field in my interface builder) and I would like to be able to access an NSComboBox object which present in my interface builder from this class.

This is my code: txtField1.h:

#import <Cocoa/Cocoa.h>

@interface txtField1 : NSTextField

@end

txtField.m:

#import "txtField1.h"

@implementation txtField1

-(void)mouseDown:(NSEvent *)theEvent
{
    HERE I would like to be able to write something like:
    [combobox SetHidden:YES];
}

@end

I would like to be able to set access the combobox SetHidden property, in the mouseDown event. Can you please tell me how to do that? I have tried different solutions found on internet but didn't obtain anything at all! Any help would be appreciated.

possible duplicate of Using object from one class in another — Anoop Vaidya
– Anoop Vaidya, Commented Mar 4, 2013 at 17:09
Every day I see similar question dozen of time, and all has same answer!!! — Anoop Vaidya
– Anoop Vaidya, Commented Mar 4, 2013 at 17:10
have a look here please: stackoverflow.com/questions/15248130/… — rambodrahmani
– rambodrahmani, Commented Mar 6, 2013 at 19:13
Solution to my question here: stackoverflow.com/questions/15248130/… — rambodrahmani
– rambodrahmani, Commented Mar 17, 2013 at 16:04

Community · Accepted Answer · 2017-05-23 12:24:08Z

1

Here are a lot of ways, and answers here, to do :

Update a label through button from different view

Xcode - update ViewController label text from different view

Setting label text in another class

Set label on another view to stored NSDate

EDIT:

-(void)mouseDown:(NSEvent *)theEvent
{
    HERE I would like to be able to write something like:
    [combobox SetHidden:YES];
    /*
        use the shared instance of comboBox here and make it hidden.
        Also, you can use binding to make it hidden
    */
}

edited May 23, 2017 at 12:24

CommunityBot

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answered Mar 4, 2013 at 17:09

Anoop Vaidya

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5 Comments

rambodrahmani Over a year ago

Sorry but actually none of the answers you suggested helped me. Can you please make me an example?

Anoop Vaidya Over a year ago

access an NSComboBox object which present in my interface builder from this class. in which class, it is?

rambodrahmani Over a year ago

"use the shared instance of comboBox here and make it hidden." Can you please make me an example of code since I am a newbie in cocoa programming? thank you.

rambodrahmani Over a year ago

Any idea? I'll try to explain you all what I'm trying to do again: I have an NSTextfield and an NSComboBox. Well I want the NSTextField to disappear and the NSComboCox to appear when some one clicks inside the NSTextField. Help me. Thank you.

rambodrahmani Over a year ago

have a look here please: stackoverflow.com/questions/15248130/…

CAMOBAP · Accepted Answer · 2013-03-04 17:12:27Z

0

From my point of view txtField1 class is not better place to this code.

You can add NSControlTextEditingDelegate protocol to your NSViewController implementation (that already contains IBOutlets for txtField1 and combobox) and in method – control:textView:doCommandBySelector: implement hiding of your NSComboBox

answered Mar 4, 2013 at 17:12

CAMOBAP

5,6778 gold badges62 silver badges96 bronze badges

2 Comments

rambodrahmani Over a year ago

Any idea? I'll try to explain you all what I'm trying to do again: I have an NSTextfield and an NSComboBox. Well I want the NSTextField to disappear and the NSComboCox to appear when some one clicks inside the NSTextField. Help me. Thank you.

rambodrahmani Over a year ago

have a look here please: stackoverflow.com/questions/15248130/…

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