Ios CametLayer可绘制纹理在某些设备上很奇怪

我使用下面的代码从金属层获取并附加一个像素缓冲区。在某些非特定设备上，输出如下所示，可绘制纹理pixelFormat为

。无效

static func make(with currentDrawable: CAMetalDrawable, usingBuffer pool: CVPixelBufferPool) -> (CVPixelBuffer?, UIImage) {

      let destinationTexture = currentDrawable.texture

      var pixelBuffer: CVPixelBuffer?
      _ = CVPixelBufferPoolCreatePixelBuffer(kCFAllocatorDefault, pool, &pixelBuffer)
      if let pixelBuffer = pixelBuffer {
        CVPixelBufferLockBaseAddress(pixelBuffer, CVPixelBufferLockFlags.init(rawValue: 0))
        let region = MTLRegionMake2D(0, 0, Int(currentDrawable.layer.drawableSize.width), Int(currentDrawable.layer.drawableSize.height))

        let bytesPerRow = CVPixelBufferGetBytesPerRow(pixelBuffer)

        let tempBuffer = CVPixelBufferGetBaseAddress(pixelBuffer)
        destinationTexture.getBytes(tempBuffer!, bytesPerRow: Int(bytesPerRow), from: region, mipmapLevel: 0)

        let image = imageFromCVPixelBuffer(buffer: pixelBuffer)
        CVPixelBufferUnlockBaseAddress(pixelBuffer, CVPixelBufferLockFlags.init(rawValue: 0))
        return (pixelBuffer, image)
      }
      return (nil, UIImage())
    }


static func imageFromCVPixelBuffer(buffer: CVPixelBuffer) -> UIImage {

      let ciimage = CIImage(cvPixelBuffer: buffer)
      let cgimgage = context.createCGImage(ciimage, from: CGRect(x: 0, y: 0, width: CVPixelBufferGetWidth(buffer), height: CVPixelBufferGetHeight(buffer)))

      let uiimage = UIImage(cgImage: cgimgage!)

      return uiimage
    }

有人知道为什么会发生这种情况以及如何预防吗

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这里还可以找到一些来自经历过这种情况的人的反馈：

CVPixelBuffer的

imageFromCVPixelBuffer

是如何工作的？@rhytricFistman添加到question@RhythmicFistman这里是一个包含这个问题的开源项目的链接。这个问题取决于它吗？我没有。它也可能发生在scenekit上。