Question

I would like to know what steps are needed once a fresh “Single view” project was created in xcode, in order to achieve:
1. a viewController that initializes without a NIB, but rather programmatically loads it’s own controls in its view.
2. How to get that viewcontroller’s view to load and call viewDidLoad?
3. make the view for that controller visible on the screen with all of the controls.

How do I go about this from this function:

-(BOOL)application:(UIApplication*)application didFinishLoadingWithOptions:(NSDictionary *)launchOptions 

I am trying to modify a new xcode project but all I get is a black screeen, viewDidLoad doesn’t get called

Answer 1

That’s your app delegate’s application loading method.

In there, you would probably want to create an instance of your custom view controller and assign that as the rootViewController to your app delegate didFinishLoading. There should be a line like:

// app delegate .h file

#import "CustomViewController.h"

@interface
{
    ...
    CustomViewController *myCustomVC;
    ...
}

@property (nonatomic, retain) CustomViewController *myCustomVC;


// app delegate .m file
@implementation AppDelegate

@synthesize myCustomVC;

-(BOOL)application:(UIApplication*)application didFinishLoadingWithOptions:(NSDictionary *)launchOptions 
{
    ...
    myCustomerVC = [[CustomViewController alloc] init];

    [self.window setRootViewController:myCustomVC]; 
    ...
}

Then inside your custom view controller’s viewDidLoad method, you can do this as a test:

// custom view controller .m file
-(void)viewDidLoad
{
    self.view.backgroundColor = [UIColor redColor];
}