我试图使用UIDocument
在iCloud Drive中打开,修改和保存文件。当我使用文件位置调用save(to:for:completionHandler:)
并将.forOverwriting
用于UIDocumentSaveOperation
时,它会以success = true
的状态完成。但是,iCloud文件(如桌面和iOS文件浏览器中所示)不会更新,并且在重新打开文件时,不会显示更改。我已验证contents(forType:)
在保存时会返回正确(已修改)的文件内容。尽管指示成功,UIDocument仍未保存到文件
(注:我已经看过this question,但它不是非常有帮助)
这里是代码的有关章节:
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,我已经尝试了所有我能想到的方法来解决这个问题。任何援助,你可以给我将不胜感激。
@matt对不起,这应该是'.forOverwriting'。我只是暂时改变它,看看它是否有所作为(它没有)。 – Matt
而不是downvoting,有人可以提供一些建设性的反馈?我真的需要找到一个答案。 – Matt
观察“UIDocumentStateChanged”通知。在回调中,你是否碰巧报告过'inConflict'的状态? –