change sub UIView background color - iphone

Question

I'm trying to add subview in my ViewController using this method
- (void)viewDidLoad
{
[super viewDidLoad];
addCourse = [[UIView alloc]init];
addCourse.backgroundColor = [UIColor redColor];
[addCourse.layer setCornerRadius:50.0f];
[addCourse.layer setMasksToBounds:YES];
}
Where addCourse is my subview but the background color is still white. and I'm using storyboard and added the subview with it and linked the View with viewcontroller and I did write the IBOutlet and the property and synthesize but still I couldn't find a way to change the background color.
How I can change it ?

Answer 1

If you already linked with the ViewController then you just need to remove the below line from your code
addCourse = [[UIView alloc]init];
Because, it create the new instance of your subView.

Answer 2

You haven't added addCourse to your view controller as as I can see. replace your viewDidLoad method with:
- (void)viewDidLoad
{
[super viewDidLoad];
addCourse = [[UIView alloc]init];
addCourse.backgroundColor = [UIColor redColor];
[addCourse.layer setCornerRadius:50.0f];
[addCourse.layer setMasksToBounds:YES];
//ADDED THIS LINE
self.view = addCourse;
}

Answer 3

See I have updated your code (Just you need to Set View's Frame) and I got the Result
Please! Update your code this way
- (void)viewDidLoad
{
[super viewDidLoad];
//custom view
UIView *addCourse = [[UIView alloc]init];
CGRect myViewframe = CGRectMake(10.0f, 90.0f, 100.0f, 100.0f);
addCourse.frame=myViewframe;
addCourse.backgroundColor = [UIColor redColor];
[addCourse.layer setCornerRadius:50.0f];
[addCourse.layer setMasksToBounds:YES];
[self.view addSubview:addCourse];
}
and Here is the result screen

Answer 4

addCourse = [[UIView alloc]initWithFrame:CGRectMake(x, y, w, h)];
addCourse.backgroundColor = [UIColor redColor];
[addCourse.layer setCornerRadius:50.0f];
[addCourse.layer setMasksToBounds:YES];
[self.view addSubview:addCourse];