Objective c PDF文件未附加到邮件生成器

我正在创建一个pdf文件，以便使用MFMailComposeViewController将其附加到电子邮件中，但在执行附加之前，我正在检查该文件，并且该文件为空，没有任何内容会随电子邮件一起发送

我不知道出了什么问题，因为我正在一步一步地遵循我在这里和其他页面中看到的内容，但仍然不起作用

我错过了一些我显然看不见的东西

这是邮件发送功能

- (IBAction)emailSend:(UIButton *)sender {

    // calling pdf file creator
    [self drawText];

    // Email message implementation
    // Email Subject
    NSString *emailTitle = myMssgSubject.text;

    // Email Content
    NSString *messageBody = [NSString stringWithFormat:@"<h3>%@</h3>\n<h4>iReceipt Number: %@</h4>\n<h4>Customer: %@</h4>\n<h4>Customer Address: %@</h4>\n<h4>Customer Phone: %@</h4>", myMssgText.text, myReceiptNo, myCustomer, myCusAddress, myCusPhoneNo]; // Change the message body to HTML

    // To address
    NSArray *toRecipents = [NSArray arrayWithObject:myMssgReceiver.text];

    MFMailComposeViewController *mailViewController = [[MFMailComposeViewController alloc] init];
    mailViewController.mailComposeDelegate = self;
    [mailViewController setSubject:emailTitle];
    [mailViewController setMessageBody:messageBody isHTML:YES];
    [mailViewController setToRecipients:toRecipents];

    NSData *pdfData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle]pathForResource:@"invoice" ofType:@"pdf"]];

    if(pdfData == nil)
        NSLog(@"Its empty!");

    // for .doc is application/msword and for .docx is application/vnd.openxmlformats-officedocument.wordprocessingml.document
    [mailViewController addAttachmentData:pdfData mimeType:@"application/pdf" fileName:fileName];

    // Present mail view controller on screen
    [self presentViewController:mailViewController animated:YES completion:NULL];


}

MFMailComposeViewController *mailComposer = [[MFMailComposeViewController alloc] init];

NSString* fileName = @"invoice.pdf";

NSArray *arrayPaths =
NSSearchPathForDirectoriesInDomains(
                                    NSDocumentDirectory,
                                    NSUserDomainMask,
                                    YES);

NSString *path = [arrayPaths objectAtIndex:0];

NSString* pdfFileName = [path stringByAppendingPathComponent:fileName];

NSData *myData = [NSData dataWithContentsOfFile:pdfFileName];

[mailComposer addAttachmentData:myData mimeType:@"application/pdf" fileName:@"invoice.pdf"];

然后，这是我创建我正在使用的pdf文件的函数

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不确定你们是否需要更多的解释或信息，请让我知道，我会在帖子中评论或提供

您的drawText方法正在使用documents文件夹中的文本hello world创建文件。 若要手动签出此文件，您可以找到此文件的路径，请尝试使用以下代码行记录此路径

NSString *appFolderPath = [[NSBundle mainBundle] resourcePath];
NSFileManager *fileManager = [NSFileManager defaultManager];
NSLog(@"App Directory is: %@", appFolderPath);

所以，如果你不能把这个文件和附件的电子邮件，这是第二个问题。一切都好

NSString *fullPath = [[paths lastObject] stringByAppendingPathComponent:@"Invoice.pdf"];
NSData *pdfData = [NSData dataWithContentsOfFile:fullPath];

我最后用它来解决问题

换句话说，这就是我在emailSend功能中所做的

- (IBAction)emailSend:(UIButton *)sender {

    // calling pdf file creator
    [self drawText];

    // Email message implementation
    // Email Subject
    NSString *emailTitle = myMssgSubject.text;

    // Email Content
    NSString *messageBody = [NSString stringWithFormat:@"<h3>%@</h3>\n<h4>iReceipt Number: %@</h4>\n<h4>Customer: %@</h4>\n<h4>Customer Address: %@</h4>\n<h4>Customer Phone: %@</h4>", myMssgText.text, myReceiptNo, myCustomer, myCusAddress, myCusPhoneNo]; // Change the message body to HTML

    // To address
    NSArray *toRecipents = [NSArray arrayWithObject:myMssgReceiver.text];

    MFMailComposeViewController *mailViewController = [[MFMailComposeViewController alloc] init];
    mailViewController.mailComposeDelegate = self;
    [mailViewController setSubject:emailTitle];
    [mailViewController setMessageBody:messageBody isHTML:YES];
    [mailViewController setToRecipients:toRecipents];

    NSData *pdfData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle]pathForResource:@"invoice" ofType:@"pdf"]];

    if(pdfData == nil)
        NSLog(@"Its empty!");

    // for .doc is application/msword and for .docx is application/vnd.openxmlformats-officedocument.wordprocessingml.document
    [mailViewController addAttachmentData:pdfData mimeType:@"application/pdf" fileName:fileName];

    // Present mail view controller on screen
    [self presentViewController:mailViewController animated:YES completion:NULL];


}

MFMailComposeViewController *mailComposer = [[MFMailComposeViewController alloc] init];

NSString* fileName = @"invoice.pdf";

NSArray *arrayPaths =
NSSearchPathForDirectoriesInDomains(
                                    NSDocumentDirectory,
                                    NSUserDomainMask,
                                    YES);

NSString *path = [arrayPaths objectAtIndex:0];

NSString* pdfFileName = [path stringByAppendingPathComponent:fileName];

NSData *myData = [NSData dataWithContentsOfFile:pdfFileName];

[mailComposer addAttachmentData:myData mimeType:@"application/pdf" fileName:@"invoice.pdf"];

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谢谢你的帮助：

结帐我以前试过，但不起作用，我想是少了些什么，但现在是。。谢谢对不起，我真的不明白你想做什么。。路径从何而来？？fileManager也从未使用过。。