How to set a background image in Xcode using swift

Question

How can I set a background image for my main view controller in Xcode 6 using swift  I know that you can do this in the assistant editor as below       override func viewDidLoad         super viewDidLoad       view backgroundColor   UIColor yellowColor       What is the code to set the background to an image I have in my assets folder

User · Answer

I am beginner to iOS development so I would like to share whole info I got in this section.

First from image assets (images.xcassets) create image set .

According to Documentation here is all sizes need to create background image.

For iPhone 5:
   640 x 1136

   For iPhone 6:
   750 x 1334 (@2x) for portrait
   1334 x 750 (@2x) for landscape

   For iPhone 6 Plus:
   1242 x 2208 (@3x) for portrait
   2208 x 1242 (@3x) for landscape

   iPhone 4s (@2x)      
   640 x 960

   iPad and iPad mini (@2x) 
   1536 x 2048 (portrait)
   2048 x 1536 (landscape)

   iPad 2 and iPad mini (@1x)
   768 x 1024 (portrait)
   1024 x 768 (landscape)

   iPad Pro (@2x)
   2048 x 2732 (portrait)
   2732 x 2048 (landscape)

call the image background we can call image from image assets by using this method UIImage(named: "background") here is full code example

  override func viewDidLoad() {
          super.viewDidLoad()
             assignbackground()
            // Do any additional setup after loading the view.
        }

  func assignbackground(){
        let background = UIImage(named: "background")

        var imageView : UIImageView!
        imageView = UIImageView(frame: view.bounds)
        imageView.contentMode =  UIViewContentMode.ScaleAspectFill
        imageView.clipsToBounds = true
        imageView.image = background
        imageView.center = view.center
        view.addSubview(imageView)
        self.view.sendSubviewToBack(imageView)
    }

User · Answer

override func viewDidLoad         super viewDidLoad       self view backgroundColor   UIColor patternImage  UIImage named   background png

User · Answer

override func viewDidLoad          let backgroundImage   UIImageView frame  UIScreen main bounds      backgroundImage image   UIImage named   bg image       backgroundImage contentMode   UIViewContentMode scaleAspectfill     self view insertSubview backgroundImage  at  0       Updated at 20-May-2020   The code snippet above doesn t work well after rotating the device  Here is the solution which can make the image stretch according to the screen size after rotating    class ViewController  UIViewController        var imageView  UIImageView             let imageView   UIImageView frame   zero          imageView image   UIImage named   bg image           imageView contentMode    scaleToFill         imageView translatesAutoresizingMaskIntoConstraints   false         return imageView              override func viewDidLoad             super viewDidLoad            view insertSubview imageView  at  0          NSLayoutConstraint activate               imageView topAnchor constraint equalTo  view topAnchor               imageView leadingAnchor constraint equalTo  view leadingAnchor               imageView trailingAnchor constraint equalTo  view trailingAnchor               imageView bottomAnchor constraint equalTo  view bottomAnchor

User · Answer

Swift 5 3 in XCode 12 2 Playgrounds Place the cursor wherever in the code the  insertLiteral would have been in earlier versions  Select from the top-menu Editor- gt Insert Image Literal    and navigate to the file  Click Open  The file is added to a playground Resource folder and will then appear when the playground is run in whichever view it was positioned when selected  If a file is already in the playground Bundle  e g  in  Resources  it can be dragged directly to the required position in the code  where it will be represented by an icon   cf  Apple help docs give details of this and how to place other colour and file literals

User · Answer

You can try this as well  which is really a combination of previous answers from other posters here        let backgroundImage   UIImageView frame  UIScreen main bounds      backgroundImage image   UIImage named   RubberMat       backgroundImage contentMode    UIViewContentMode scaleAspectFill     self view insertSubview backgroundImage  at  0

User · Answer

For Swift 4  let backgroundImage   UIImageView frame  UIScreen main bounds  backgroundImage image   UIImage named   bg name png   backgroundImage contentMode   UIViewContentMode scaleAspectFill self view insertSubview backgroundImage  at  0

User · Answer

SWIFT 4  view layer contents    imageLiteral resourceName   webbg   cgImage

User · Answer

Background Image from API in swift 4  with Kingfisher     import UIKit import Kingfisher  extension UIView    func addBackgroundImage imgUrl  String  placeHolder  String       let backgroundImage   UIImageView frame  self bounds      backgroundImage kf setImage with  URL string  imgUrl   placeholder  UIImage named  placeHolder       backgroundImage contentMode   UIViewContentMode scaleAspectFill     self insertSubview backgroundImage  at  0         Usage   someview addBackgroundImage imgUrl   yourImgUrl   placeHolder   placeHolderName

[ios] How to set a background image in Xcode using swift?

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