1

我有一个 Mac 应用程序,它可以读取带有存储为NSAttributedString. 我想将其转换为 HTML,包括图像。

获取 HTML 工作正常,我什至可以枚举附加图像,但我无法获得附加图像的实际文件名。我需要那些用于生成的 HTML。

获取 HTML:

let htmlData = try attrString.dataFromRange(NSMakeRange(0, attrString.length), 
documentAttributes: [NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType])

产生:

<p class="p1"><img src="file:///Untitled%202.jpg" alt="Untitled 2.jpg"></p>

枚举附加图像:

    attrString.enumerateAttribute(NSAttachmentAttributeName,
        inRange: NSMakeRange(0, attrString.length),
        options: [],
        usingBlock: {attachment, range, _ in

        if let attachment = attachment as? NSTextAttachment,
            let fileWrapper = attachment.fileWrapper,
            let data = fileWrapper.regularFileContents
        {
            // This prints <NSTextAttachment: 0x7fe68d5304c0> "Untitled 2.jpg"
            // But there's no API to get the name?
            print(attachment.description)
        }
    })

所以我以NSTextAttachment实例结束,但无法确定实际文件名(“Untitled 2.jpg”)。NSFileWrapper.filename返回nil,我没有看到从文本附件中获取名称的 API。

令人沮丧的部分是信息在文本附件中。如果我打印它的调试描述,我会看到文件名:

<NSTextAttachment: 0x7fe68d5304c0> "Untitled 2.jpg"
<NSTextAttachment: 0x7fe68d533d60> "Pasted Graphic.tiff"

如何访问文件名?(不解析调试描述;)

4

2 回答 2

2

NSTextAttachment 没有图像名称和图像 url 的属性,这绝对是荒谬的。

当我初始化我的自定义类时,我将 NSTextAttachment 子类化并添加了这些属性。

前任:

子类:

import Foundation

class CustomTextAttachment: NSTextAttachment {

    var imageURL: String?
    var imageTitle: String?

}

执行:

let textAttachment = CustomTextAttachment()
textAttachment.imageTitle = title
textAttachment.imageURL = url

现在,当我点击图像时:

func textView(_ textView: UITextView, shouldInteractWith textAttachment: NSTextAttachment, in characterRange: NSRange) -> Bool {

    print("Tapped custom text attachment")

    if let commentTextAttachment = textAttachment as? CustomTextAttachment, let title = commentTextAttachment.imageTitle, let link = commentTextAttachment.imageURL {
         print("Got title \(title) and link \(link) for attachment")
    }

    return true
}
于 2018-04-10T18:00:23.887 回答
1

供将来参考:使用fileWrapper.preferredFilename代替fileWrapper.fileName(感谢@Willeke)。谁会想到有两个属性...

于 2016-12-05T15:24:05.730 回答