swift compare multiple images to an array of images - ios

Question

I have 2 UIImageViews connected to an array of images
I'm trying compare both once they are displayed but doesn't seems to work.
I tried using imageArray[Image Literal] and also imageArray[image1.png, image2.png, image3.png, image4.png, image5.png]
I'm not sure what im doing wrong.
im not looking for the code although it may help but what im looking is for a someone to guide me to the right direction
#IBOutlet weak var 1ImageView: UIImageView!
#IBOutlet weak var 2ImageView: UIImageView!
let imageArray = [image1.png, image2.png, image3.png, image4.png, image5.png]
func any() {
if (1ImageView != nil) && (2ImageView != nil) && isEqual(image1.png) {
print("match!")
} else if ...// more if statements
…last if statement} else {
print(“no match!”)
}
#IBAction func buttonPressed(_ sender: IUButton) {
any()
}
If this is not possible is there a way to assign an identifier to each of the images inside the array..
sorry for the extra question.
there is one answer on comparing 2 images using NSData but Im not sure how to implement it to an array.
thanks and sorry but the newbie question.

Answer 1

image.isEqual(image) seems to be unreliable, despite what documentation says. If you don't need to make a pixel perfect comparison, converting image to a data and comparing those would be sufficient.
let image1 = UIImage(named: "image1.png")
let image2 = UIImage(named: "image2.png")
let imageData1 = image1?.pngData()
let imageData2 = image2?.pngData()
if imageData1 == imageData2 {
print("images are the same")
} else {
print("images are different")
}
Looking for a specific image inside an array can build on that:
// array of images referencing image files within an Xcode project
// it's not the best idea to force unwrap those, but for the sake of simplicity
let imageArray = [UIImage(named: "image1.png")!,
UIImage(named: "image2.png")!,
UIImage(named: "image3.png")!,
UIImage(named: "image4.png")!,
UIImage(named: "image5.png")!]
func anySimilarImages() {
// find first image which is the same as 1ImageView's
let 1ImageViewImage: UIImage? = imageArray.first { (image) -> Bool in
return image.pngData() == 1ImageView.image?.pngData()
}
// find first image which is the same as 2ImageView's
let 1ImageViewImage: UIImage? = imageArray.first { (image) -> Bool in
return image.pngData() == 2ImageView.image?.pngData()
}
if 1ImageViewImage != nil && 2ImageViewImage != nil {
print("both images were found")
}
else if 1ImageViewImage != nil {
print("first image was found")
}
else if 2ImageViewImage != nil {
print("second image was found")
}
else {
print("no image was found")
}
}