[iOS] Example code for adding UIButton programatically into the view of the UIViewController

UIButtonExample

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0, 22, 200, 100)];
    [button setTitle:@"Back" forState:UIControlStateNormal];
    [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
    [self.view bringSubviewToFront:button];

    [self.view setBackgroundColor:[UIColor whiteColor]];
}

- (void)buttonPressed:(id)sender
{
    [self dismissViewControllerAnimated:YES completion:nil];
}