ios - pdf 的操作扩展

Question

我正在尝试使用扩展程序在我的应用程序中打开pdf文件，我可以使用Xcode为图像提供的默认文件来显示图像，即使我能够在未设置激活规则时显示pdf，但我们如果不指定我们在应用程序中使用的扩展程序类型，则无法发布应用程序。

尝试了很多方法都失败了我根据 stackoverflow 上的一些问题对 info.plist 做了很少的更改，但 Xcode 抛出错误，指出无法读取属性列表

<dict>
        <key>NSExtensionActivationRule</key>
        <string>
        SUBQUERY (
            extensionItems,
            $extensionItem,
            SUBQUERY (
                $extensionItem.attachments,
                $attachment,
                ANY $attachment.registeredTypeIdentifiers UTI-CONFORMS-TO "com.adobe.pdf"
            ).@count == $extensionItem.attachments.@count
        ).@count == 1
        </string>
        </dict>

这是我的actionviewcontroller代码:

{


@IBOutlet weak var myPdfView: PDFView!

override func viewDidLoad() {
    super.viewDidLoad()

    // Get the item[s] we're handling from the extension context.

    // For example, look for an image and place it into an image view.
    // Replace this with something appropriate for the type[s] your extension supports.
    for item in self.extensionContext!.inputItems as! [NSExtensionItem] {
        for provider in item.attachments! {
            if provider.hasItemConformingToTypeIdentifier(kUTTypePDF as String) {
                // This is an image. We'll load it, then place it in our image view.
                weak var weakPDFView = self.myPdfView
                provider.loadItem(forTypeIdentifier: kUTTypePDF as String, options: nil, completionHandler: { (imageURL, error) in
                    OperationQueue.main.addOperation {
                        if let strongPDFView = weakPDFView {
                            if let imageURL = imageURL as? URL {
                                strongPDFView.document = PDFDocument(data: try! Data(contentsOf: imageURL))
                            }
                        }
                    }
                })
                break
            }
        }

    }
}

@IBAction func done() {
    // Return any edited content to the host app.
    // This template doesn't do anything, so we just echo the passed in items.
    self.extensionContext!.completeRequest(returningItems: self.extensionContext!.inputItems, completionHandler: nil)
}

}

Answer 1

Xcode is throwing error saying unable to read property list

错字。这是

</dict>

不是

<dict/>