addSubView after dismissViewControllerAnimated - iphone

Question

I'm trying to add a UIImageView to my ViewController after I dismiss a modal view controller.
But for some reason [self.view addSubview:[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"Logo.png"]; isn't adding the UIImageView to the display, or at least it's not visible. The example code that I'm calling in the modal view controller is below.
/* Modal View Controller */
- (IBAction)hideModal:(id)sender {
[self dismissViewControllerAnimated:YES completion:^() {
TestViewController *gv = [self.storyboard instantiateViewControllerWithIdentifier:#"testView"];
[gv view];
[gv addLogo];
}];
}
/* TestViewController */
-(void)addLogo {
[self.view addSubview:[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"Logo.png"];
}

Answer 1

Change the method call from completion block
/* Modal View Controller */
- (IBAction)hideModal:(id)sender {
[self dismissViewControllerAnimated:YES completion:nil];
TestViewController *gv = [self.storyboard instantiateViewControllerWithIdentifier:#"testView"];
[gv view];
[gv addLogo];
}
/* TestViewController */
-(void)addLogo {
UIImage *myImage = [UIImage imageNamed:#"Logo.png"];
UIImageView *myImageView = [[UIImageView alloc] initWithImage:myImageView];
myImageView.frame = CGRectMake(0,0,100,100);
if(myImage)
{
[self.view addSubview:myImageView];
[self.view bringSubViewToFront:myImageView];
}
else
{
NSLog(#"no image found");
}
}

Answer 2

Change
[self addSubview:[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"Logo.png"]];
to
[self.view addSubview:[[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"Logo.png"] autorelease]];
The other way to do it, is to call addSubview method from viewDidAppear in your TestViewController

Answer 3

The completion block was not the same as the initial view controller being displayed.
When trying to reference the view controller being displayed under the modal view controller call the below code:
[self dismissViewControllerAnimated:YES completion:^() {
UINavigationController *nav = (UINavigationController *)[UIApplication sharedApplication].keyWindow.rootViewController;
gv = (TestViewController *)nav.topViewController;
[gv displayLogo];
}];