AppDelegate and .xib are not implementing properly, but build is successful? - ios

Question

I really don't know how to explain this without pasting all my code, but ill give it a shot. "Assuming" my .hs and .ms are accurate, i have a feeling my .xib is not set correctly, but i cant really paste the code from that. Instead i've zipped the files and uploaded the source code. (if you are brave enough, it's here: http://bit.ly/ZtDkGi ) Im getting a successful build, but my emulator's screen is just black after the app launches.
Essentially, i had to manually add an appDelegate object. i set the class to the appropriate class - but its still not pulling. If someone would be kind enough to help, that would be great.
here's my Test_TableViewAppDelegate.h
#import <UIKit/UIKit.h>
#interface Test_TableViewAppDelegate : NSObject <UIApplicationDelegate>
{
}
#property (nonatomic, retain) IBOutlet UIWindow *window;
#property (nonatomic, retain) IBOutlet UINavigationController *navController;
#end
here's my new Test_TableViewAppDelegate.m
#import "Test_TableViewAppDelegate.h"
#implementation Test_TableViewAppDelegate
#synthesize window=_window;
#synthesize navController=_navController;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
//self.window.backgroundColor = [UIColor whiteColor];
UIWindow *window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
window.backgroundColor = [UIColor greenColor];
self.window = window;
UIViewController *fvc = [[UIViewController alloc] init];
UIViewController *rootController = [[UIViewController alloc] initWithNibName:#"RootViewController" bundle:nil];
UINavigationController *nc = [[UINavigationController alloc]initWithRootViewController:rootController];
//UINavigationController *nc = [[UINavigationController alloc]initWithRootViewController:fvc];
self.navController = nc;
//[self.window addSubview: nc.view];
//[self.window makeKeyAndVisible];
self.window.rootViewController = self.navController;
[self.window makeKeyAndVisible];
return YES;
}
RootViewController.h
#import <UIKit/UIKit.h>
#interface RootViewController : UITableViewController {
NSMutableArray *petsArray;
}
#end
RootViewController.m
#import "RootViewController.h"
#interface RootViewController ()
#end
#implementation RootViewController
and last but not least, main.m ( i think this might be an issue too)
#import "Test_TableViewAppDelegate.h"
int main(int argc, char *argv[])
{
#autoreleasepool {
return UIApplicationMain(argc, argv, nil, NSStringFromClass([Test_TableViewAppDelegate class]));
}
}
thanks in advance. i'd appreciate it :D

Answer 1

in your delegate Test_TableViewAppDelegate
why you adding views two times to the window?
// you could remove these two lines
[self.window addSubview: nc.view];
[self.window makeKeyAndVisible];
//keep these two lines
self.window.rootViewController = self.navController;
[self.window makeKeyAndVisible];
And this view you are adding to the navigationController it is not initalized with any nib name
UIViewController *fvc = [[UIViewController alloc] init];
initialization should be like this instead in your delegate
RootViewController *rootController = [[RootViewController alloc] initWithNibName:#"RootViewController" bundle:nil];
UINavigationController *nc = [[UINavigationController alloc]initWithRootViewController:rootController];

Answer 2

I believe the reason that you're getting a black screen is that you are not properly allocating and initializing your navigation controller!
Instead, you should try this code:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions: (NSDictionary *)launchOptions
{
// create the base window
UIWindow *window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
window.backgroundColor = [UIColor greenColor];
self.window = window;
[window release];
// this is the home page from the user's perspective
FirstViewController *fvc = [[FirstViewController alloc] init];
UINavigationController *nc = [[UINavigationController alloc]initWithRootViewController:fvc];
self.navigationController = nc;
[fvc release];
[nc release];
// show them
[self.window addSubview: nc.view];
[self.window makeKeyAndVisible];
return YES;
}
Hope this works!