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POreturning null inside tableview delegate
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  1. POreturning null inside tableview delegate
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    copied!<p>HI I am working on UITablview based project. i like to load a new view when ever a cell got click. i am using following code in didselectRowAtIndexPath delegate method. The below coding is not showing any error but new view not get load and [self navigationController] is returning null.</p> <p>inside Viewdidload function [self navigationcontroller] returning proper value. but inside Delegate method [self navigationcontroller] returns null. </p> <pre><code> /// inside appDelegate class - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch. self.viewController = [[LAMainViewController_iPhone alloc]initWithNibName:@"LAMainViewController_iPhone" bundle:nil]; UINavigationController *controller = [[UINavigationController alloc]initWithRootViewController:viewController]; [window addSubview:controller.view]; [controller release]; [window makeKeyAndVisible]; return YES; } /// inside LAmainviewcontroller.m - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) { // Custom initialization } //self.navigationController.navigationBar.backgroundColor =[UIColor clearColor];// .title=@"test"; return self; } - (void)viewDidLoad { [super viewDidLoad]; NSString *materialPlistPath = [[NSBundle mainBundle]pathForResource:@"materials" ofType:@"plist"]; materialList = [[NSArray alloc]initWithContentsOfFile:materialPlistPath]; materialTable.backgroundColor = [UIColor blackColor]; NSLog(@" dud kiad navigationController %@", self.navigationController); //2010-10-20 15:22:03.809 LabAssistant[17368:207] dud kiad navigationController &lt;UINavigationController: 0x5f3b160&gt; } -(void)viewWillAppear:(BOOL)animated{ [super viewWillAppear:YES]; self.navigationController.navigationBarHidden = YES; NSIndexPath *indexPath = [materialTable indexPathForSelectedRow]; [materialTable deselectRowAtIndexPath:indexPath animated:YES]; } -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{ LAMaterialPropertiesViewController_iPhone *materialPropertyListView = [[[LAMaterialPropertiesViewController_iPhone alloc] initWithNibName:@"LAMaterialPropertiesViewController_iPhone" bundle:nil] autorelease]; materialPropertyListView.chemicalName = [[materialList objectAtIndex:[indexPath row]] objectForKey:@"materialProperty"]; [[self navigationController] pushViewController:materialPropertyListView animated:YES]; NSLog(@"%@",[self navigationController]); ///2010-10-20 16:20:42.634 LabAssistant[17656:207] navigationController (null) } </code></pre> <p>please help me to fix this issue. thanks!</p>
 

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