سويفت API لحفظ PNG كـ TXT

// For complete examples and data files, please go to https://github.com/aspose-cells-cloud/aspose-cells-cloud-swift/
    import AsposeCellsCloud
    let expectation1 = self.expectation(description: "checkAuth")
    AsposeCellsCloudAPI.clientId = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
    AsposeCellsCloudAPI.clientSecret = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
    AuthAspose.checkAuth()
    {
        (authError) in
        guard authError == nil else {
            return
        }
        expectation1.fulfill()
    }
    self.waitForExpectations(timeout: testTimeout, handler: nil)     
    let expectation = self.expectation(description: "saveAs")
    let name:String = BOOK1.png
    let saveOptions:PdfSaveOptions? = PdfSaveOptions(enableHTTPCompression: nil, saveFormat: "pdf", clearData: nil, cachedFileFolder: nil, validateMergedAreas: nil, refreshChartCache: nil, createDirectory: nil, sortNames: nil, calculateFormula: nil, checkFontCompatibility: nil, onePagePerSheet: true, compliance: nil, defaultFont: nil, printingPageType: nil, imageType: nil, desiredPPI: nil, jpegQuality: nil, securityOptions: nil)
    let newfilename:String = "newbook.txt"
    let isAutoFitRows:Bool? = true
    let isAutoFitColumns:Bool? = true
    let folder:String = TEMPFOLDER
    let storageName:String? = nil        
    CellsAPI.cellsSaveAsPostDocumentSaveAs(name: name, saveOptions: saveOptions, newfilename: newfilename, isAutoFitRows: isAutoFitRows, isAutoFitColumns: isAutoFitColumns, folder: folder, storageName: storageName)
    {
        (response, error) in
        guard error == nil else {
            return
        }            
        if let response = response {
            expectation.fulfill()
        }
    }
    self.waitForExpectations(timeout: testTimeout, handler: nil)