Question

我正在尝试将CIFilter应用于我的单一视图应用程序中的imageView中已显示的图像，但它似乎没有应用过滤器。有人可以建议吗？我的输入图像看起来完全一样。

（SWIFT）：

(?i)        -- makes the regex case insensitive
[\s\S]      -- is an atom to match any character - even newlines
*?          -- match 0 or more, but as few as possible, of the previous atom
(           -- start a group that captures all matches until the closing )
(?:         -- start a group that doesn't capture it's contents
<|%3C)      -- match either a < or %3C (which is the URL-encoded version of <)
(?:\/|%2F)? -- optionally match a / or %2F
[a-z\d]+    -- match one or more letters or numbers
(?:>|%3E)   -- match the closing tag
)           -- close the open group

CONSOLE：

let filter = CIFilter.init(name: "CIHueAdjust")
let context = CIContext()
var extent: CGRect!
var scaleFactor: CGFloat!

@IBOutlet weak var img: UIImageView!

override func viewDidLoad() {
    super.viewDidLoad()

    let ciImage = CIImage.init(image: img.image!)

    filter?.setDefaults()
    filter?.setValue(ciImage, forKeyPath: kCIInputImageKey)
    let result = filter?.outputImage
    print("result: \(result)")

    var image = UIImage.init(cgImage: context.createCGImage(result!, from: result!.extent)!)
    img.image = image


    img.image = image
}

Answer 1

在评论中，但是这里有关于如何使用Swift 4设置对CIHueAdjust的调用的完整（并且格式更好）的答案：

let filter = CIFilter(name: "CIHueAdjust")
let context = CIContext()
var extent: CGRect!
var scaleFactor: CGFloat!

@IBOutlet weak var img: UIImageView!

override func viewDidLoad() {
    super.viewDidLoad()

    let ciImage = CIImage(image: img.image!)

    // Note: you may use kCIInputImageKey for inputImage
    filter?.setValue(ciImage, forKey: "inputImage")
    filter?.setValue(Float(1), forKey: "inputAngle")
    let result = filter?.outputImage

    var image = UIImage(cgImage: context.createCGImage(result!, from: result!.extent)!)
    img.image = image

}

CIFilter应用于不工作的图像 - 迅捷

1 个答案: