How to generate random image using image view in swift - ios

Question

I just followed treehouse course and create my first Fun Fact app.In that they generate a random array quotes.
Needed:
I have placed image view using storyboard.Already when pressing one button random array quotes will generate.But i need when that same button pressed a random image should generate.I am new to swift .!
This is factbook.swift
struct FactBook {
// stored in arry to show all quotes
let factsArray = [
"You have to dream before your dreams can come true.",
"To succeed in your mission, you must have single-minded devotion to your goal.",
"You have to dream before your dreams can come true.",
"Love your job but don’t love your company, because you may not know when your company stops loving you.",
"Failure will never overtake me if my definition to succeed is strong enough.",
]
//make a random quote
func randomFact() -> String {
//
// let unsignedRandomNumber = arc4random_uniform(unsignedArrayCount)
//
let unsignedArrayCount = UInt32(factsArray.count)
let unsignedRandomNumber = arc4random_uniform(unsignedArrayCount)
let randomNumber = Int(unsignedRandomNumber)
//
// let unsignedRandomNumber = arc4random_uniform(unsignedArrayCount)
// let randomNumber = Int(signedRandomNumber)
return factsArray[randomNumber]
}
}
This is viewcontroller.swift
class ViewController: UIViewController {
#IBOutlet weak var funFactLabel: UILabel!
#IBOutlet weak var funFactButton: UIButton!
#IBOutlet weak var imgV: UIImageView!
let factBook = FactBook()
let colorWheel = ColorWheel()
//method to define
// let yourImage = UIImage(named: "apj")
// let imageview = UIImageView(image: yourImage)
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
funFactLabel.text = factBook.randomFact()
self.view.backgroundColor = UIColor(patternImage: UIImage(named: "apj")!)
// let yourImage = UIImage(named: "apj")
// let imageview = UIImageView(image: yourImage)
// self.view.addSubview(imageview)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func showFunFact() {
let randomColor = colorWheel.randomColor()
view.backgroundColor = randomColor
funFactButton.tintColor = randomColor
//funFactButton.tintColor = clearcolor
funFactLabel.text = factBook.randomFact()
}
}

Answer 1

The solution mainly is to use the same approach you have done with the random text. So to sum up, you should have an array of the images, and a function to select a random image. Then call that function from your view controller. A possible implementation to this approach is:
Add this array to your FactBook
let factsImagesArray = [
"image1.png",
"image2.png",
"image3.png",
"image4.png",
"image5.png",
]
Add this method to your FactBook
func randomFactImage() -> UIImage {
let unsignedArrayCount = UInt32(factsImageArray.count)
let unsignedRandomNumber = arc4random_uniform(unsignedArrayCount)
let randomNumber = Int(unsignedRandomNumber)
return UIImage(named: factsImageArray[randomNumber])!
}
and in your viewcontroller change showFunFact to:
#IBAction func showFunFact() {
let randomColor = colorWheel.randomColor()
view.backgroundColor = randomColor
funFactButton.tintColor = randomColor
funFactLabel.text = factBook.randomFact()
imgV.image = faceBook.randomFactImage()
}
Ofc you should have the image1.png, image2.png ... in your resources

Answer 2

#IBAction func randomimage(sender: AnyObject)
{
//list of Images in array
let image : NSArray = [ UIImage(named: "1.jpg")!,
UIImage(named: "2.jpg")!,
UIImage(named: "3.jpg")!,
UIImage(named: "4.jpg")!,
UIImage(named: "5.jpg")!,
UIImage(named: "6.jpg")!,
UIImage(named: "7.jpg")!]
//random image generating method
let imagerange: UInt32 = UInt32(image.count)
let randomimage = Int(arc4random_uniform(imagerange))
let generatedimage: AnyObject = image.objectAtIndex(randomimage)
self.myimage.image = generatedimage as? UIImage
}