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POCannot access contents of NSMutableArray when calling from a different class
 

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    <p>I want to have an array that is accessible throughout my Objective-C project whose contents I can change where necessary. My problem is that when I call the array from a different class I always get null, and that's not what I want. </p> <p>In my .h file I have </p> <pre><code>@interface MainScreen2 : UIViewController @property (nonatomic, strong) NSMutableArray *Judith; </code></pre> <p>and in the viewDidLoad function on the .m file I have:</p> <pre><code>@interface MainScreen2 () @end @implementation MainScreen2 @synthesize Judith; - (void)viewDidLoad { self.Judith = [[NSMutableArray alloc] initWithObjects:@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9", nil]; [super viewDidLoad]; } </code></pre> <p>this is fine.</p> <p>In a separate class I have:</p> <pre><code>#import "MainScreen2.h" @interface NewGame () @end - (void)viewDidLoad { MainScreen2 *testJudith; NSMutableArray *testJudithArray = [[NSMutableArray alloc]init]; testJudithArray = [testJudith.Judith mutableCopy]; NSLog(@"Jud test: %@", [testJudith.Judith objectAtIndex:1]); } </code></pre> <p>and the <code>NSLog</code> returns null for this point. Is this because when I am calling the Judith array from the MainScreen.h file it is empty at this point because it is not yet loaded?</p> <p>If so, can anyone help me with where I should be putting the array so when I call it I retain it's original contents?</p> <hr> <p>EDIT: 30 Apr</p> <p>Using a combination of the suggestions kindly put on this page I have now sorted out the problem and it now works. </p> <pre><code>I changed the code to the following: - (void)viewDidLoad { MainScreen2 *testJudith = [[MainScreen2 alloc]init]; [testJudith viewDidLoad]; NSString *test = [testJudith.Judith objectAtIndex:1]; NSLog(@"Jud test: %@", test); } </code></pre> <p>thanks to all that contributed to the forum post!</p>
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    1. COYou should not call `-viewDidLoad` directly, instead you should let it be called by `-loadView`. Calling it directly might cause problems.
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      1. USDietrich Epp
 

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