Xcode erreur : identificateur

Je Reçois un message d'erreur indiquant "Devrait Identifier" à cette ligne de code

UINavigationController *navController1 = [[[UINavigationController alloc] initWithRootViewController:viewController4]];  

Ce code est placé dans l'application des délégués comme suit

#import "AppDelegate.h"

#import "FirstViewController.h"

#import "SecondViewController.h"

#import "ParkTable.h"
#import "TableTest.h"

@implementation AppDelegate

@synthesize window = _window;
@synthesize tabBarController = _tabBarController;
@synthesize ParkTableDel = _tableViewController;
@synthesize navController;




- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
//Override point for customization after application launch.
UIViewController *viewController1 = [[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil];
UIViewController *viewController2 = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];
UITableViewController *viewController3 = [[ParkTable alloc] initWithNibName:@"ParkTable" bundle:nil];
UITableViewController *viewController4 = [[TableTest alloc] initWithNibName:@"TableTest" bundle:nil];
UINavigationController *navController1 = [[[UINavigationController alloc] initWithRootViewController:viewController4]];  

self.tabBarController = [[UITabBarController alloc] init];
self.ParkTableDel = [[UITableViewController alloc] init];

self.tabBarController.viewControllers = [NSArray arrayWithObjects:viewController1, viewController2, viewController3, viewController4, nil];
self.window.rootViewController = self.tabBarController;    
[self.window makeKeyAndVisible];
return YES;
}

//[...] Boilerplate code removed.
@end

Je me demandais ce que je dois changer pour le rendre correct.

OriginalL'auteur James Kerstan | 2011-11-06