Re: Help with Basics (Was: help with bindings)
Re: Help with Basics (Was: help with bindings)
- Subject: Re: Help with Basics (Was: help with bindings)
- From: Ricky Sharp <email@hidden>
- Date: Sun, 21 Nov 2010 06:09:51 -0600
On Nov 21, 2010, at 2:59 AM, Rounak Jain wrote:
> Thanks Jerry,
> I have used the dictionaryWithObjectsAndKeys: method.
> I have implemented your suggestions regarding "convenience constructors" and myKeys object. Regarding your comment about making everything "mutable", I think, at the moment, it has to be that way.
> What's next?
As Jerry pointed out, you need to learn the basics; please read up on the basics to include memory management.
The way you've now written things will cause your app to crash. I'll leave the reason for the crash as an exercise for you to figure out.
> #import <Cocoa/Cocoa.h>
>
> @interface ComboscAppDelegate : NSObject <NSApplicationDelegate> {
> IBOutlet NSComboBox *countryCombo;
> NSMutableDictionary *theCountries;
> NSMutableArray *myKeys;
> IBOutlet NSWindow *window;
> }
> @property (assign) IBOutlet NSWindow *window;
> - (void)applicationWillFinishLaunching:(NSNotification *)notif;
> @end
>
>
>
> #import "ComboscAppDelegate.h"
> @implementation ComboscAppDelegate
>
> @synthesize window;
> - (void)applicationWillFinishLaunching:(NSNotification *)notif {
> theCountries = [NSMutableDictionary dictionaryWithObjectsAndKeys:
> [NSMutableArray arrayWithObjects:@"AAABBB", @"AABBB", @"AAACCC", nil], @"A",
> [NSMutableArray arrayWithObjects:@"BBBAAA", @"BBBBBBBB", @"BBBCCC", nil], @"B",
> [NSMutableArray arrayWithObjects:@"CCCDDD", @"CCFGGGFF", @"CCCDDDFFF", nil], @"C", nil];
>
> myKeys = [NSMutableArray arrayWithObjects: [theCountries allKeys], nil];
> }
> @end
___________________________________________________________
Ricky A. Sharp mailto:email@hidden
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