ios - 将一张图像分成多个部分后，如何在 Swift 中使用 UIImage 数组？

Question

我正在关注this dicussion并得到了一组图像，这些图像是原始图像的划分部分。如果我打印它，它看起来像这样:

[<UIImage: 0x61000008ea60>, {309, 212}, <UIImage: 0x61000008ec90>, {309, 212}, <UIImage: 0x61000008ebf0>, {309, 213}, <UIImage: 0x61000008ec40>, {309, 213}]

我如何使用这个数组的元素？在常规情况下，我将拥有图像的名称并可以使用，例如 UIImage(named: "")。该数组没有向我显示任何名称。你有什么想法吗？

也许我的错误在这里:

 func setImage(){


        testImage = UIImageView(frame: CGRect(x: 0, y: 0, width: size/1.5, height: size/1.5))
        testImage.center = CGPoint(x: view.frame.width/2, y: view.frame.height/2)


        slice(image: UIImage(named:"leopard_PNG14834")!, into: 8)

        testImage.image = images[2]


        view.addSubview(testImage)


}

这是函数代码

func slice(image: UIImage, into howMany: Int) -> [UIImage] {
    let width: CGFloat
    let height: CGFloat

    switch image.imageOrientation {
    case .left, .leftMirrored, .right, .rightMirrored:
        width = image.size.height
        height = image.size.width
    default:
        width = image.size.width
        height = image.size.height
    }

    let tileWidth = Int(width / CGFloat(howMany))
    let tileHeight = Int(height / CGFloat(howMany))

    let scale = Int(image.scale)


    let cgImage = image.cgImage!

    var adjustedHeight = tileHeight

    var y = 0
    for row in 0 ..< howMany {
        if row == (howMany - 1) {
            adjustedHeight = Int(height) - y
        }
        var adjustedWidth = tileWidth
        var x = 0
        for column in 0 ..< howMany {
            if column == (howMany - 1) {
                adjustedWidth = Int(width) - x
            }
            let origin = CGPoint(x: x * scale, y: y * scale)
            let size = CGSize(width: adjustedWidth * scale, height: adjustedHeight * scale)
            let tileCgImage = cgImage.cropping(to: CGRect(origin: origin, size: size))!
            images.append(UIImage(cgImage: tileCgImage, scale: image.scale, orientation: image.imageOrientation))
            x += tileWidth
        }
        y += tileHeight
    }
    return images
}

Answer 1

如果您很难将图像添加到 ViewController，这是您常用的方法，假设输入是图像数组:

let image = images[0]
let imageView = UIImageView(image: image)
self.view.addSubview(imageView)

编辑

如果您弄乱了 ImageView 的框架，我建议您在使用上面的图像初始化 UIImageView 后执行此操作。要测试发生了什么，也许只需添加一个带有所需图像的 ImageView 即可，而不会弄乱框架。然后检查用于设置框架的变量。