Home / Questions / 8798
Accepted
Víctor Gonzal
Asked: 2020-04-30 14:43:26 +0800 CST 2020-04-30 14:43:26 +0800 CST

Make a UIImageview fill the entire screen

  • 772

I am working with TableViewControllers and in my first TableView I have decided that an image will appear that occupies the entire length and width of the screen in such a way that what is behind it is not visible until the image disappears (This part is already achieved). I am doing it as follows:

   override func viewDidLoad() {
    super.viewDidLoad()
    let nav = self.navigationController?.navigationBar
    nav!.hidden = true
    let bounds = UIScreen.mainScreen().bounds
    let screenHeight = bounds.size.height
    let screenWidth = bounds.size.width
   

    let dynamicImage=UIImageView(frame: CGRectMake(0, 0, screenWidth, screenHeight))
    dynamicImage.backgroundColor=UIColor.greenColor()
    
    self.view.addSubview(dynamicImage)
  UIView.animateWithDuration(0.2, delay: 10.0, options: [] , animations: {() -> Void in
        dynamicImage.alpha = 0.0
        }, completion: {(true) -> Void in
            dynamicImage.removeFromSuperview()
            nav!.hidden = false
    })

The case is that the screen looks like this:

Screenshot

and it does not occupy the entire height of the screen, since the upper bar is still visible, in addition to the fact that if I touch the screen and slide upwards, the scroll scrolls through the UIImageview upwards. What I want is that the UIImageview contains an advertising image that lasts x number of seconds with the screen locked, however I have two problems:

  1. Doesn't take up the whole screen
  2. The UIImageview can be manipulated (i.e. scroll down as the scrollview scrolls.

Thank you

ios

1 Answers

  1. Best Answer

    You have to be clear that the bar above is the UINavigationBarone of a UINavigationControllerand that as such, it is not the one UIViewControllerwhere you are adding the image. Or put another way, you're not adding the UIImageViewto UINavigationControllerand for that reason it doesn't take up the screen. You have to be clear that it UINavigationControlleris a container that has a queue implemented with viewControllerswhich you add and remove. In your case, you are adding the image in the UIViewControllerone that is currently visible in the UINavigationController.

    For it to work properly, you must do the following:

    // Añadimos imagen
let dynamicImage = UIImageView(frame: UIScreen.mainScreen().bounds)
dynamicImage.backgroundColor = .greenColor()
navigationController?.view.addSubview(dynamicImage)

// Ocultamos imagen
UIView.animateWithDuration(0.2, delay: 10.0, options: [], animations: {

    dynamicImage.alpha = 0.0

}) { (completed) in

    dynamicImage.removeFromSuperview()

}
    • 1