No UIView appearing in the interface - ios

Question

NOTE: Jump to end for answer.
I am new to IOS Programming. How can I add a visible UIView to the following code. So far it just has the nav bar appear, and black space below, no imageView or the square UIView in the code below.
Below is code in my HomeScreenViewController
- (void)viewDidLoad
{
[super viewDidLoad];
UIImageView *friendsIcon = [[UIImageView alloc] initWithImage:([UIImage imageWithContentsOfFile:#"change_user-512"])];
[friendsIcon setFrame:CGRectMake(0, 0, 100, 100)];
[self.view addSubview:friendsIcon];
UIView *square = [[UIView alloc] initWithFrame:CGRectMake(200, 200, 100, 100)];
[square setTintColor:[UIColor orangeColor]];
[self.view addSubview:square];
// Do any additional setup after loading the view.
}
Below is code in AppDelegate.
#implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.myViewController = [[HomeScreenViewController alloc] init];
UINavigationController *navBar = [[UINavigationController alloc] initWithRootViewController:self.myViewController];
navBar.title = #"Navigation";
self.window.rootViewController = navBar;
[self.window makeKeyAndVisible];
return YES;
}
EDIT:
Here is also the interface for appDelegate. This is literally the only code in the proj other than the generated lines upon creating the project in xcode. I also deleted the storyboard file along with its info in the plist file (otherwise the app would crash).
#import <UIKit/UIKit.h>
#import "HomeScreenViewController.h"
#interface AppDelegate : UIResponder <UIApplicationDelegate>
#property (strong, nonatomic) UIWindow *window;
#property (nonatomic, strong) HomeScreenViewController *myViewController;
#end
EDITAgain:
No Need to Read Comments, just read this:
Yes, viewDidLoad does invoke.
The background changes to red if i set background color.
No I am not using storyboard.
Still unanswered.
http://postimg.org/image/h5ayao2q3/
FINAL EDIT: Finally! problem solved. It was as simple as setting the background colour for the UIView square. D'oh.
- (void)loadView
{
[super loadView];
self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[self.view setBackgroundColor:[UIColor redColor]];
UIImageView *friendsIcon = [[UIImageView alloc] initWithImage:([UIImage imageWithContentsOfFile:#"change_user-512"])];
[friendsIcon setFrame:CGRectMake(0, 0, 100, 100)];
[self.view addSubview:friendsIcon];
UIView *square = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
[square setBackgroundColor:[UIColor orangeColor]];
[self.view addSubview:square];
// Do any additional setup after loading the view.
}
Thank you very much everyone for your help. I guess my UIImage is borked, but I can figure that out myself.

Answer 1

Try changing it:
self.myViewController = [[HomeScreenViewController alloc] init];
TO:
self.myViewController = [[HomeScreenViewController alloc] initWithNibName:#"HomeScreenViewController" bundle:nil];
And Make sure there are some label or some thing in HomeScreenViewController. Other part of your code looks fine. Hope this helps. :)

Answer 2

First put breakpoint and verify that ViewDidLoad method is getting called.
If not , since you mentioned that you are creating the views programmatically you need to override the - (void)loadView method and create the view for the view controller.
-(void)loadView {
self.view = [[UIView alloc] init];
UIImageView *friendsIcon = [[UIImageView alloc] initWithImage:([UIImage imageWithContentsOfFile:#"change_user-512"])];
[friendsIcon setFrame:CGRectMake(0, 0, 100, 100)];
[self.view addSubview:friendsIcon];
UIView *square = [[UIView alloc] initWithFrame:CGRectMake(200, 200, 100, 100)];
[square setBackgroundColor:[UIColor orangeColor]];
[self.view addSubview:square];
}
Changed the line [square setTintColor:[UIColor orangeColor]]; to [square setBackgroundColor:[UIColor orangeColor]];

Answer 3

right click your UIViewController and check view connection is established to the xib or storyboard view.
ViewDidload will not get called unless view loads from storyboard or xib.
loadView method gets called if you are creating UIView programatically

Answer 4

If you are not using story board or XIB then you need to add the following method
-(void)loadView{
//load the views
}

Answer 5

I have two options to solve this problem:
1) If you have XIB file corresponding to the controller:
HomeScreenViewController *homeScreenViewController = [[HomeScreenViewController alloc] initWithNibName:#"HomeScreenViewController"] bundle:nil];
1a. Verify the name of your XIB is correct.
1b. Goto XIB file of HomeScreenViewController -> File Owner -> Connection Inspector -> Check the view outlet is connected.
2) If you do it programmatically, add this to the end of your loadView function:
self.view = square;
so the final code should look like:
- (void)loadView
{
//[super loadView];
self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; // <-- look at here, your view has changed its frame now
[self.view setBackgroundColor:[UIColor redColor]];
UIImageView *friendsIcon = [[UIImageView alloc] initWithImage:([UIImage imageWithContentsOfFile:#"change_user-512"])];
[friendsIcon setFrame:CGRectMake(0, 0, 100, 100)];
[self.view addSubview:friendsIcon];
UIView *square = [[UIView alloc] initWithFrame:CGRectMake(200, 200, 100, 100)];
[square setTintColor:[UIColor orangeColor]];
[self.view addSubview:square];
// Do any additional setup after loading the view.
}