添加到NSAttribute String时翻转的图像

extension NSImage {
  func resize(containerWidth: CGFloat) -> NSImage {

    var scale : CGFloat = 1.0
    let currentWidth = self.size.width
    let currentHeight = self.size.height

    if currentWidth > containerWidth {
      scale = (containerWidth * 0.9) / currentWidth
    }

    let newWidth = currentWidth * scale
    let newHeight = currentHeight * scale

    self.size = NSSize(width: newWidth, height: newHeight)

    return self
  }
}

下面是属性字符串中图像的枚举:

newAttributedString.enumerateAttribute(NSAttributedStringKey.attachment, in: NSMakeRange(0, newAttributedString.length), options: []) { value, range, stop in
    if let attachement = value as? NSTextAttachment {
        let image = attachement.image(forBounds: attachement.bounds, textContainer: NSTextContainer(), characterIndex: range.location)!

        let newImage = image.resize(containerWidth: markdown.bounds.width)
        let newAttribute = NSTextAttachment()
        newAttribute.image = newImage
        newAttributedString.addAttribute(NSAttributedStringKey.attachment, value: newAttribute, range: range)
    }
}

我已经设置了断点并检查了图像,它们都处于正确的旋转状态,除非到达这一行:

newAttributedString.addAttribute(NSAttributedStringKey.attachment, value: newAttribute, range: range)

图像垂直翻转的位置。