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POGaining access to an NSMutableArray
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  1. POGaining access to an NSMutableArray
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    copied!<p>I am new to arrays and objects. I have a class HowToPlay.h (of course that has a .m also) their i define two arrays </p> <pre><code>NSMutableArray *nibs; NSMutableArray *unusedNibs; @property (nonatomic, retain) NSMutableArray *nibs; @property (nonatomic, retain) NSMutableArray *unusedNibs; </code></pre> <p>then we jump into the .m, i write all the stuff for the arrays,</p> <pre><code>nibs = [[NSMutableArray alloc]initWithObjects:@"Question 2", @"Question 3", nil]; self.unusedNibs = nibs; [nibs release]; </code></pre> <p>Then i also have another class called Question 1, i need to be able to use this array in that class, and be able to change it, but keep the changes on the HowToPlay.m file. </p> <p>here is why, basically this array loads random NIB files, and then deletes them from the array when they have been used. </p> <p>in Question 1.m here is what im doing to use the array</p> <pre><code>random = arc4random() % [self.unusedNibs count]; NSString *nibName = [self.unusedNibs objectAtIndex:random]; [self.unusedNibs removeObjectAtIndex:random]; if (nibName == @"Question 3") { Question_3 *Q3 = [[Question_3 alloc] initWithNibName:@"Question 3" bundle:nil]; Q3.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal; [self presentModalViewController:Q3 animated:YES]; [Q3 release]; } if (nibName == @"Question 2") { Question_2 *Q2 = [[Question_2 alloc] initWithNibName:@"Question 2" bundle:nil]; Q2.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal; [self presentModalViewController:Q2 animated:YES]; [Q2 release]; } </code></pre> <p>This all seems to work fine, but the problem im having is it seems that objects in the array are not getting deleted, even though this line runs</p> <pre><code>[self.unusedNibs removeObjectAtIndex:random]; </code></pre> <p>I haved tried making it </p> <pre><code>[HowToPlay.unusedNibs removeObjectAtIndex:random]; </code></pre> <p>I get a error saying <code>expected '.' before '.' token</code></p> <p>It seems to me that i have access to read the array, but not to change it. any way to fix this so i can change the array? thanks</p> <p>UPDATE:</p> <p>here is the whole HowToPlay.h file contents:</p> <pre><code>#import &lt;UIKit/UIKit.h&gt; #import &lt;AVFoundation/AVFoundation.h&gt; int score; int usedQ1; int usedQ2; int usedQ3; NSMutableArray *nibs; NSMutableArray *unusedNibs; @interface HowToPlay : UIViewController &lt;UIPickerViewDelegate, UIPickerViewDataSource&gt; { UIPickerView *selectType; NSMutableArray *selectArray; AVAudioPlayer *audioPlayer; UIActivityIndicatorView *progress; UIButton *worldButton; UIButton *politicsButton; UIButton *starButton; } @property (nonatomic, retain) NSMutableArray *nibs; @property (nonatomic, retain) NSMutableArray *unusedNibs; @property (nonatomic, retain) IBOutlet UIButton *worldButton; @property (nonatomic, retain) IBOutlet UIButton *politicsButton; @property (nonatomic, retain) IBOutlet UIButton *starButton; @property (nonatomic, retain) IBOutlet UIPickerView *selectType; @property (nonatomic) int usedQ1; @property (nonatomic) int usedQ2; @property (nonatomic) int usedQ3; @property (readwrite) int score; -(IBAction)World:(id)sender; - (IBAction)Politics:(id)sender; -(IBAction)Stars:(id)sender; @end #import "MainViewController.h" #import "Question 1.h" #import "Question 2.h" #import "Question 3.h" </code></pre> <p>I import after because otherwise i get errors</p> <p>Also I have the array set up on theViewDidLoad part of HowToPlay, is this a bad idea?</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; self.view.backgroundColor = [UIColor blackColor]; NSURL *click = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/click.wav", [[NSBundle mainBundle] resourcePath]]]; audioPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:click error:nil]; audioPlayer.numberOfLoops = 1; progress = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray]; progress.frame = CGRectMake(0.0, 0.0, 30.0, 30.0); progress.center = self.view.center; [self.view addSubview: progress]; usedQ1 = 0; usedQ2 = 0; usedQ3 = 0; selectArray = [[NSMutableArray alloc]init]; [selectArray addObject:@"World"]; [selectArray addObject:@"Politics"]; [selectArray addObject:@"Stars"]; score = 0; nibs = [[NSMutableArray alloc]initWithObjects:@"Question 2", @"Question 3", nil]; self.unusedNibs = nibs; [nibs release]; } </code></pre>
 

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