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POError While referencing AppDelegate
 

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  1. POError While referencing AppDelegate
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    <p>I have an App Delegate and a 3 view controllers in my project. I have a variable(a NSMutable Array) in my App Delegate which I want to access from my view controllers. So I decided to create a pointer to my App Delegate and access the variables. Here is my code:</p> <pre><code>iSolveMathAppDelegate.h #import &lt;UIKit/UIKit.h&gt; @interface iSolveMathAppDelegate : NSObject &lt;UIApplicationDelegate&gt; { UIWindow *window; UITabBarController *tabBarController; NSMutableArray *tmpArray; } @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) NSMutableArray *tmpArray; // variable I want to access @property (nonatomic, retain) IBOutlet UITabBarController *tabBarController; @end </code></pre> <p>iSolveMathAppDelegate.m</p> <pre><code>#import "iSolveMathAppDelegate.h" @implementation iSolveMathAppDelegate @synthesize window; @synthesize tabBarController; @synthesize tmpArray; ... - (void)dealloc { [tabBarController release]; [window release]; [tmpArray release]; [super dealloc]; } @end </code></pre> <p>The view controller class from which I want to access the tmpArray.</p> <p>referenceViewController.h</p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @class iSolveMathAppDelegate; @interface referenceViewController : UITableViewController { NSMutableArray *equationTypes; iSolveMathAppDelegate *data; } @property(nonatomic, retain) NSMutableArray *equationTypes; @property(nonatomic, retain) iSolveMathAppDelegate *data; @end </code></pre> <p>And finally referenceViewController.m</p> <pre><code>#import "referenceViewController.h" @implementation referenceViewController @synthesize equationTypes, data; data = (iSolveMathAppDelegate *)[[UIApplication sharedApplication] delegate]; //says that initializer element is not constant...ERROR! - (void)viewDidLoad { [super viewDidLoad]; NSString *path = [[NSBundle mainBundle] pathForResource:@"equationTemplates"ofType:@"plist"]; data.tmpArray = [[NSMutableArray alloc] initWithContentsOfFile:path]; self.equationTypes = data.tmpArray; [data.tmpArray release]; // obviously none of these work, as data is not set. } - (void)dealloc { [super dealloc]; [equationTypes release]; [data release]; } @end </code></pre> <p>So anyway at the line <code>data = (iSolveMathAppDelegate *)[[UIApplication sharedApplication] delegate];</code> the compiler says that the initializer element is not constant.</p> <p>I have scrouged the web for answers, and for all it seems to work...but no dice for me :( Can you please advice me on where I have gone wrong? I am using XCode 3.2 and iOS SDK 3....maybe the SDK is the problem.</p> <p>Thank You</p>
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