Using NSMutableArray in a class

Question

Whenever I try to add something to my array in the method nothing gets added to the array. I'm wanting it to when you press the button it will add a new object to the array.

//  JBNumberGeneration.h

#import <Cocoa/Cocoa.h>


@interface JBNumberGeneration : NSObject {
 IBOutlet NSTextField *displayLabel;
 int randNum;
 int level;
 int i;
 NSMutableArray* userNumSequence;
}

-(IBAction)logSequenceNumber:(id)sender;

@end


//  JBNumberGeneration.m

#import "JBNumberGeneration.h"


@implementation JBNumberGeneration

-(IBAction)logSequenceNumber:(id)sender{
  NSString *titleOfButton = [sender title];
 int sequenceNumber = [titleOfButton integerValue];

 int count = [userNumSequence count];
 i++;

 [userNumSequence addObject:[NSNumber numberWithInteger:sequenceNumber]];

 NSLog(@"Array size: %i", count);
    }
    @end

abdollar · Accepted Answer · 2010-09-25 00:39:50Z

2

Have you initialized the array somewhere using something like userNumSequence = [NSMutableArray arrayWithCapacity:0]; I could not see that in your code as that would cause nothing to get added.

answered Sep 25, 2010 at 0:39

abdollar

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5 Comments

JoeMBlair Over a year ago

Ok I added it in but it seems to create the array and then delete after the function is finished.

JoeMBlair Over a year ago

Added it in after "int sequenceNumber = [titleOfButton integerValue]; "

abdollar Over a year ago

initialize the array in init for the class JBNumberGeneration

abdollar Over a year ago

- (id) init { if (self = [super init]) { userNumSequence = [NSMutableArray arrayWithCapacity:0]; } return self; }

JoeMBlair Over a year ago

Thank you for your help, I'm quite new to objective-C.

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