尽管表示成功,但UIDocument未保存到文件

Question

我正在尝试使用iCloud Drive打开,修改和保存文件UIDocument.当我打电话save(to:for:completionHandler:)与文件的位置和使用.forOverwriting的UIDocumentSaveOperation,它的状态完成success = true.但是,iCloud文件(如桌面和iOS文件浏览器中所示)不会更新,重新打开文件时,不会显示更改.我已验证contents(forType:)在保存时返回正确(修改)的文件内容.

(注意:我已经看过这个问题了,但它没有太大帮助)

以下是相关的代码部分:

MainViewController.swift:

var saveFile: SBDocument?

@IBAction func bbiOpen_pressed(_ sender: UIBarButtonItem) {

    if saveFile == nil {
        let importMenu = UIDocumentMenuViewController(documentTypes: self.UTIs, in: .import)
        importMenu.delegate = self
        importMenu.popoverPresentationController?.barButtonItem = bbiOpen
        self.present(importMenu, animated: true, completion: nil)
    } else {
        willClose()
    }

}

func willClose(_ action: UIAlertAction?) {
    if saveFile!.hasUnsavedChanges {
        dlgYesNoCancel(self, title: "Save Changes?", message: "Would you like to save the changes to your document before closing?", onYes: doSaveAndClose, onNo: doClose, onCancel: nil)
    } else {
        doSaveAndClose(action)
    }
}

func doSaveAndClose(_ action: UIAlertAction?) {
    saveFile?.save(to: saveFileURL!, for: .forOverwriting, completionHandler: { Void in
        self.saveFile?.close(completionHandler: self.didClose)
    })
}

func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentAt url: URL) {
    saveFile = SBDocument(fileURL: url)
    saveFile!.open(completionHandler: { success in self.finishOpen(didCompleteSuccessfully: success) })
}

func finishOpen(didCompleteSuccessfully result: Bool) {
    if result {
        print(saveFile!.localizedName)
        saveFileURL = saveFile!.fileURL
        saveFileName = saveFile!.localizedName
        self.navTitleBar.prompt = saveFileName
        bbiOpen.title = NSLocalizedString("titleClose", comment: "Close")
        bbiOpen.style = .plain
    } else {
        saveFile = nil
    }
}

@IBAction func bbiSave_pressed(_ sender: UIBarButtonItem) {
    self.saveFile!.save(to: self.saveFileURL!, for: .forOverwriting, completionHandler: self.didSave)
}

func didSave(_ success: Bool) {
    guard success else {
        print("Error saving soundboard file to \(String(describing: saveFileURL))")
        return
    }
    print("File saved successfully")        
}

SBDocument.swift:

class SBDocument: UIDocument {
    override var fileType: String? { get { return "com.whitehatenterprises.SoundBoardFX.sbd" } }
    override var savingFileType: String? { get { return "com.whitehatenterprises.SoundBoardFX.sbd" } }

    override init(fileURL url: URL) {
        super.init(fileURL: url)
    }

    override func contents(forType typeName: String) throws -> Any {
        let arr = NSArray(array: SoundEffects)
        let data: NSData = NSKeyedArchiver.archivedData(withRootObject: arr) as NSData
        return data
    }
}

更新: 我真的需要帮助,我已经尝试了解决这个问题的一切.您可以给我的任何帮助将不胜感激.

Answer 1

所以根据

https://developer.apple.com/reference/uikit/uidocument

看起来保存功能实际上并不是用于保存文档。我从阅读中了解到，保存仅用于创建新文档。我知道您正在使用 .forOverwriting 来保存它，但 iCloud 中可能有某些东西不会让完全覆盖发生。

在你的 doSaveAndClose 方法中尝试调用

self.saveFile?.close(completionHandler: self.didClose)

通过它自己。您可能需要执行某种类型的 if 查询来检查文件是否存在。如果没有，则调用 .save()，否则调用 .close 函数。似乎无论文档何时关闭，它都会保存更改。