一共2步

第一步：

let docmPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first!

letfileName = (model.url!asNSString).lastPathComponent

?letfilePath = docmPath +"/accessory/\(model.name!).\(model.type!)"

self.saveFileToPhone(url: filePath)

第二步：

//MARK: 下載文件保存到手機文件指定目錄

? ? func saveFileToPhone(url:String) {

? ? ? ? letdocumentPicker =UIDocumentPickerViewController.init(url:URL(fileURLWithPath: url),in: .exportToService)

? ? ? ? documentPicker.delegate=self

? ? ? ? documentPicker.modalPresentationStyle = .formSheet

? ? ? ? currentViewController().present(documentPicker,animated:true)

? ? }

? ? //MARK:? - UIDocumentInteractionControllerDelegate

? ? public func documentInteractionControllerViewControllerForPreview(_ controller: UIDocumentInteractionController) -> UIViewController {

? ? ? ? return currentViewController()

? ? }

? ? public func documentInteractionControllerViewForPreview(_ controller: UIDocumentInteractionController) -> UIView? {

? ? ? ? return currentViewController().view

? ? }

? ? public func documentInteractionControllerRectForPreview(_ controller: UIDocumentInteractionController) -> CGRect {

? ? ? ? return view.frame

? ? }

? ? // MARK: - UIDocumentPickerDelegate

? ? publicfuncdocumentPicker(_controller:UIDocumentPickerViewController,didPickDocumentsAturls: [URL]) { ? ? ? ?

//保存成功

? ? }

? ? public func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) {

? ? ? ? //取消保存

? ? }