核心映像和内存泄漏，迅速3.0 [英] Core Image and memory leak, swift 3.0

问题描述

我有问题，我尝试在扩展名为3000x2000的某些图像上使用过滤器，当我这样做时，RAM上部和应用程序出现致命错误"didReceiveMemoryWarning".

i have problem i try use filter at some images which have extension 3000x2000 , when i do it RAM upper and app have fatal error the "didReceiveMemoryWarning".

 func setFilters(images: [UIImage]) -> [UIImage] {
    let filter = CIFilter(name: "CIColorControls")!
    filter.setValue(2.0, forKey: kCIInputContrastKey)

    let context = CIContext(options: nil)

    var result = [UIImage]()

    for img in images {
        let newImage = autoreleasepool(invoking: { () -> UIImage in
            filter.setValue(CIImage(image: img)!, forKey: kCIInputImageKey)

            let ciImage = filter.outputImage!
            let cgImage = context.createCGImage(ciImage, from: ciImage.extent)


            return UIImage(cgImage: cgImage!, scale: img.scale, orientation: img.imageOrientation)
        })

        result.append(newImage)
    }

    return result
}

推荐答案

这不是内存泄漏；那实际上是您使用了过多的内存.导致问题的原因不是CIFilter.事实是您试图将所有这些巨大的UIImage对象保留在单个数组中的内存中:

It's not a memory leak; it's that you are in fact using too much memory. And it's not the use of CIFilter that's causing the problem; it's the fact that you are trying to keep all of these huge UIImage objects in memory in a single array:

var result = [UIImage]()
// ...
result.append(newImage)

不要那样做.

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