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POiOS initializer parameter is nil
 

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    <p>I'm fairly new to the iOS platform and I'm having some issues with the memory management. I'm passing an object (a Trial) in through an initializer of a custom UIViewController class and when the UIViewController finally receives it, the object is nil. I was hoping someone could point me in the right direction. I've included some of the source code below.</p> <p>Trial.h</p> <pre><code>@interface Trial : NSObject { NSString *IRBNumber; NSString *PI; NSString *Sponsor; NSString *ContactName; NSString *ContactPhone; NSString *ContactEmail; NSString *Location; NSString *Objective; NSString *Eligibility; NSString *Name; NSString *DiseaseGroup; NSString *Age; } @property (retain, nonatomic) NSString *IRBNumber; @property (retain, nonatomic) NSString *PI; @property (retain, nonatomic) NSString *Sponsor; @property (retain, nonatomic) NSString *ContactName; @property (retain, nonatomic) NSString *ContactEmail; @property (retain, nonatomic) NSString *ContactPhone; @property (retain, nonatomic) NSString *Location; @property (retain, nonatomic) NSString *Objective; @property (retain, nonatomic) NSString *Eligibility; @property (retain, nonatomic) NSString *Name; @property (retain, nonatomic) NSString *DiseaseGroup; @property (retain, nonatomic) NSString *Age; @end </code></pre> <p>DiseaseControllersViewController.m</p> <pre><code>- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { Trial *trial = (Trial *)[dataArray objectAtIndex:indexPath.row]; TrialDetailController *detailViewController = [[TrialDetailController alloc] initWithNibNameAndTrial:@"TrialDetailController" bundle:nil trial:trial]; [self.navigationController pushViewController:detailViewController animated:YES]; [detailViewController release]; [trial release]; } </code></pre> <p>Here's the definition of the initializer</p> <pre><code>-(id)initWithNibNameAndTrial: (NSString*)NibNameOrNil bundle:(NSBundle*)nibBundlerOrNil trial:(Trial *)inTrial { self = [super initWithNibName:NibNameOrNil bundle:nibBundlerOrNil]; if(self) { self.trial = inTrial; } return self; } </code></pre> <p>TrialDetailController.h</p> <pre><code>#import "Trial.h" @interface TrialDetailController : UITabBarController { Trial *trial; } @property (nonatomic, retain) Trial *trial; -(id)initWithNibNameAndTrial: (NSString*)NibNameOrNil bundle:(NSBundle*)nibBundlerOrNil trial:(Trial *)inTrial; -(IBAction)objectiveTabItemClick:(id)sender; -(IBAction)detailsTabItemClick:(id)sender; @end </code></pre>
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    1. USHopdizzle
    1. USHopdizzle
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    1. COcould you post the code of the TrialDetailController's init-Method?
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      1. USsamsam
    2. COYou got it. I just posted it.
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    3. COHave you tried debugging this? You can set breakpoints and view variable / property values in the gdb debugger (console window). See [Objective-C Debugging Tips in XCode4?](http://stackoverflow.com/a/7650979/590956). Just wondering what `po dataArray` would show in debugger. Where do you add values into this array, and do you initialize the array before you try to add objects into it?
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      1. USSam
 

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