nothing is displayed when testing my app - ios

Question

originally when i tried to test my app i was getting this
[2685:70b] Application windows are expected to have a root view
controller at the end of application launch
and so i changed ccAppDelegate.m
From this
#implementation ccAppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
return YES;
}
To this
#import "ccAppDelegate.h"
#import "ccViewController.h"
#implementation ccAppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// ... Other code
// Override point for customization after application launch.
UIViewController *viewController = [[UIViewController alloc] init];
self.window.rootViewController = viewController;
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
now it is no longer crashing but nothing appears but a white screen
what can i do to fix this?
i have a copy of my work here if anyone wishes to have a look at all the code
https://drive.google.com/file/d/0B3_fSZXQB18lVzZuQVdpT3dnWjQ/edit?usp=sharing

Answer 1

as stated in the comments, you're creating and displaying an empty view controller as the root view controller. As result, you're seeing your brand new empty view controller.
If you want to use your view controller as the root one, you should change the line
UIViewController *viewController = [[UIViewController alloc] init];
to:
MyCustomViewController *viewController = [[MyCustomViewController alloc] init];
where obviously MyCustomViewController should be replaced with the name of your class ( I think it is ccViewController but I'm not sure)

Answer 2

Your method is good but to see anything onscreen you need to add anything rg. UIButton, UIImageView. I assume that you are doing everything in code so if this is hard for you why don't you try Storyboarding.
Anyway, just paste this code and you'll see a red background:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// ... Other code
// Override point for customization after application launch.
UIViewController *viewController = [[UIViewController alloc] init];
self.window.rootViewController = viewController;
self.window.backgroundColor = [UIColor redColor];
[self.window makeKeyAndVisible];
return YES;
}
All I've changed in your code is [UIColor whiteColor] to [UIColor redColor].