获取错误 [UIImage 范围]：无法识别的选择器发送到实例

Question

我正在尝试对我的 UIImageView 应用径向模糊，但是当我尝试这样做时出现错误

[UIImage extent]: unrecognized selector sent to instance

我使用的代码来自示例： https://developer.apple.com/documentation/coreimage/selectively_focusing_on_an_image

let h = bgImage.image!.size.height
let w = bgImage.image!.size.width
guard let radialMask = CIFilter(name:"CIRadialGradient") else {
    return
}
let imageCenter = CIVector(x:0.55 * w, y:0.6 * h)
radialMask.setValue(imageCenter, forKey:kCIInputCenterKey)
radialMask.setValue(0.2 * h, forKey:"inputRadius0")
radialMask.setValue(0.3 * h, forKey:"inputRadius1")
radialMask.setValue(CIColor(red:0, green:1, blue:0, alpha:0),
                    forKey:"inputColor0")
radialMask.setValue(CIColor(red:0, green:1, blue:0, alpha:1),
                    forKey:"inputColor1")

guard let maskedVariableBlur = CIFilter(name:"CIMaskedVariableBlur") else {
    return
}
maskedVariableBlur.setValue(bgImage.image, forKey: kCIInputImageKey)
maskedVariableBlur.setValue(10, forKey: kCIInputRadiusKey)
maskedVariableBlur.setValue(radialMask.outputImage, forKey: "inputMask")
let selectivelyFocusedCIImage = maskedVariableBlur.outputImage/

其中bgImage是一个UIImageView

我做错了什么？

Answer 1

我看到两个问题 - 一个是你明确地展开可选的。让 h = bgImage.image!.size.height 让 w = bgImage.image!.size.width 请在此处使用 guard 以避免意外崩溃

第二期是 bgImage.image!.size.height。在这里你应该使用 bgImage.image.CIImage.size 或类似 @image.CIImage.size 的东西。

请参考下面类似的post。我希望这会有所帮助

Unrecognized selector sent to UIImage?

Answer 2

你需要

guard let image = maskedVariableBlur?.image, cgimg = image.CGImage else {
    print("imageView doesn't have an image!")
    return
}

作为

let coreImage = CIImage(CGImage:cgimg)
maskedVariableBlur.setValue(coreImage, forKey: kCIInputImageKey)

期望 CIImage 而不是 UIImage

获取错误 [UIImage 范围]：无法识别的选择器发送到实例

Getting error [UIImage extent]: unrecognized selector sent to instance

xcode

core-image

ios

swift