Question

我有2个UIImageViews连接到图像数组我试图比较它们一旦显示但似乎不起作用。我尝试使用imageArray [Image Literal]以及imageArray [image1.png，image2.png，image3.png，image4.png，image5.png] 我不确定我在做什么错。我不是在寻找代码，尽管它可能会有所帮助，但是我正在寻找的是一个人来指导我朝正确的方向

@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()
}

如果无法实现，则可以为数组内的每个图像分配一个标识符。抱歉，还有其他问题。关于使用NSData比较2个图像有一个答案，但是我不确定如何将其实现为数组。谢谢，抱歉，但是是新手的问题。

Answer 1

尽管文档说明，

image.isEqual(image)似乎并不可靠。如果您不需要进行像素完美的比较，只需将图像转换为数据并进行比较即可。

    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")
    }

在数组中查找特定的图像可以基于此：

// 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")
    }
}

快速将多张图像与一组图像进行比较

1 个答案: