将数据从Parse保存到Excel文件并通过电子邮件发送
看看我创build的图片，以帮助您更好地了解我所问的问题。
另外，这里是我得到的parsing文本字段的保存的教程：
Adding a Cloud Backend for Your iOS App Using Parse – Part 2
这里是我所有的Excel信息中的所有ios网站：
http：// libxl.com/download.html
它可以保存数据来parsing并显示它。 此外，我可以手动创build一个.xls（Excel）文件，并通过电子邮件发送给他人。 我现在需要做的就是使用parsing的数据填充.xls文件。
这是我的.h文件
// DataViewController.h // libxl-example // // Created by dmytro on 12/25/12. // Copyright (c) 2012 xlware. All rights reserved. // #import <UIKit/UIKit.h> #import <MessageUI/MessageUI.h> #import <Parse/Parse.h> @interface DataViewController : UIViewController <MFMailComposeViewControllerDelegate> @property (strong, nonatomic) IBOutlet UILabel *dataLabel; @property (strong, nonatomic) id dataObject; - (IBAction)createExcel:(id)sender; @end 这是我的.m文件
// // DataViewController.m // libxl-example // // Created by dmytro on 12/25/12. // Copyright (c) 2012 xlware. All rights reserved. // #import "DataViewController.h" #include "LibXL/libxl.h" #import "RecipeBookViewController.h" #import "RecipeDetailViewController.h" #import "Recipe.h" @interface RecipeBookViewController () @end @implementation RecipeBookViewController { } - (id)initWithCoder:(NSCoder *)aCoder { self = [super initWithCoder:aCoder]; if (self) { // Custom the table // The className to query on self.parseClassName = @"Recipe"; // The key of the PFObject to display in the label of the default cell style self.textKey = @"name"; // Whether the built-in pull-to-refresh is enabled self.pullToRefreshEnabled = YES; // Whether the built-in pagination is enabled self.paginationEnabled = NO; // The number of objects to show per page //self.objectsPerPage = 10; } return self; } - (void)viewDidLoad { [super viewDidLoad]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(refreshTable:) name:@"refreshTable" object:nil]; } - (void)refreshTable:(NSNotification *) notification { // Reload the recipes [self loadObjects]; } - (void)viewDidUnload { [super viewDidUnload]; // Release any retained subviews of the main view. [[NSNotificationCenter defaultCenter] removeObserver:self name:@"refreshTable" object:nil]; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); } - (PFQuery *)queryForTable { PFQuery *query = [PFQuery queryWithClassName:self.parseClassName]; // If no objects are loaded in memory, we look to the cache first to fill the table // and then subsequently do a query against the network. /* if ([self.objects count] == 0) { query.cachePolicy = kPFCachePolicyCacheThenNetwork; }*/ // [query orderByAscending:@"name"]; return query; } // Override to customize the look of a cell representing an object. The default is to display // a UITableViewCellStyleDefault style cell with the label being the first key in the object. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object { static NSString *simpleTableIdentifier = @"RecipeCell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier]; if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier]; } // Configure the cell PFFile *thumbnail = [object objectForKey:@"imageFile"]; PFImageView *thumbnailImageView = (PFImageView*)[cell viewWithTag:100]; thumbnailImageView.image = [UIImage imageNamed:@"placeholder.jpg"]; thumbnailImageView.file = thumbnail; [thumbnailImageView loadInBackground]; UILabel *nameLabel = (UILabel*) [cell viewWithTag:101]; nameLabel.text = [object objectForKey:@"name"]; UILabel *prepTimeLabel = (UILabel*) [cell viewWithTag:102]; prepTimeLabel.text = [object objectForKey:@"prepTime"]; return cell; } - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { // Remove the row from data model PFObject *object = [self.objects objectAtIndex:indexPath.row]; [object deleteInBackgroundWithBlock:^(BOOL succeeded, NSError *error) { [self refreshTable:nil]; }]; } - (void) objectsDidLoad:(NSError *)error { [super objectsDidLoad:error]; NSLog(@"error: %@", [error localizedDescription]); } - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { if ([segue.identifier isEqualToString:@"showRecipeDetail"]) { NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow]; RecipeDetailViewController *destViewController = segue.destinationViewController; PFObject *object = [self.objects objectAtIndex:indexPath.row]; Recipe *recipe = [[Recipe alloc] init]; recipe.name = [object objectForKey:@"name"]; recipe.imageFile = [object objectForKey:@"imageFile"]; recipe.prepTime = [object objectForKey:@"prepTime"]; recipe.ingredients = [object objectForKey:@"ingredients"]; destViewController.recipe = recipe; } } @end @interface DataViewController () @end @implementation DataViewController - (void)dealloc { } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; self.dataLabel.text = [self.dataObject description]; } - (IBAction)createExcel:(id)sender { NSLog(@"createExcel"); BookHandle book = xlCreateBook(); // use xlCreateXMLBook() for working with xlsx files SheetHandle sheet = xlBookAddSheet(book, "Sheet1", NULL); xlSheetWriteStr(sheet, 1, 1, "Hello World !", 0); xlSheetWriteNum(sheet, 4, 1, 1000, 0); xlSheetWriteNum(sheet, 5, 1, 2000, 0); FontHandle font = xlBookAddFont(book, 0); xlFontSetColor(font, COLOR_RED); xlFontSetBold(font, true); FormatHandle boldFormat = xlBookAddFormat(book, 0); xlFormatSetFont(boldFormat, font); xlSheetWriteFormula(sheet, 6, 1, "SUM(B5:B6)", boldFormat); FormatHandle dateFormat = xlBookAddFormat(book, 0); xlFormatSetNumFormat(dateFormat, NUMFORMAT_DATE); xlSheetWriteNum(sheet, 8, 1, xlBookDatePack(book, 2011, 7, 20, 0, 0, 0, 0), dateFormat); xlSheetSetCol(sheet, 1, 1, 12, 0, 0); NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES) objectAtIndex:0]; NSString *filename = [documentPath stringByAppendingPathComponent:@"out.xls"]; xlBookSave(book, [filename UTF8String]); xlBookRelease(book); if (![MFMailComposeViewController canSendMail]) { //Show alert that device cannot send email, this is because an email account hasn't been setup. } else { //**EDIT HERE** //Use this to retrieve your recently saved file NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES) objectAtIndex:0]; NSString *filename = [documentPath stringByAppendingPathComponent:@"out.xls"]; //**END OF EDIT** NSString *mimeType = @"application/vnd.ms-excel"; //This should be the MIME type for els files. May want to double check. NSData *fileData = [NSData dataWithContentsOfFile:filename]; NSString *fileNameWithExtension = @"out.xls"; //This is what you want the file to be called on the email along with it's extension: //If you want to then delete the file: NSError *error; if (![[NSFileManager defaultManager] removeItemAtPath:filename error:&error]) NSLog(@"ERROR REMOVING FILE: %@", [error localizedDescription]); //Send email MFMailComposeViewController *mailMessage = [[MFMailComposeViewController alloc] init]; [mailMessage setMailComposeDelegate:self]; [mailMessage addAttachmentData:fileData mimeType:mimeType fileName:fileNameWithExtension]; [self presentViewController:mailMessage animated:YES completion:nil]; } } - (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error { switch (result) { case MFMailComposeResultCancelled: NSLog(@"Mail cancelled: you cancelled the operation and no email message was queued."); break; case MFMailComposeResultSaved: NSLog(@"Mail saved: you saved the email message in the drafts folder."); break; case MFMailComposeResultSent: NSLog(@"Mail send: the email message is queued in the outbox. It is ready to send."); break; case MFMailComposeResultFailed: NSLog(@"Mail failed: the email message was not saved or queued, possibly due to an error."); break; default: NSLog(@"Mail not sent."); break; } [controller dismissViewControllerAnimated:YES completion:nil]; } @end
项目快完成了，我只需要最后一点的帮助
任何事情都会有帮助！ 提前致谢！
在// EDIT HERE下面添加代码，使用PFQuery从Parse.com中检索数据。 请按照此https://parse.com/docs/ios_guide#objects-retrieving/iOS进行修改，以适应您的数据结构。
如果你不确定你的数据结构。 请login到parsing并导航到您的应用程序的数据浏览器。 它应该看起来像https://parse.com/apps/YOUR_APP_NAME/collections 。 然后点击该字段并找出JSON数据。 PFQuery将让你NSDictionary。 使用NSString键来查找NSDictionary来检索你喜欢的数据。