我有一个名为 FlashCards.pdf 的 pdf 文件
MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
NSArray *recipients = @[@"aarone_2010@hotmail.com"];
// Attach an image to the email
NSString *path = [[NSBundle mainBundle] pathForResource:@"FlashCards" ofType:@"pdf"];
NSData *myData = [NSData dataWithContentsOfFile:path];
[picker addAttachmentData:myData mimeType:@"application/pdf" fileName:@"FlashCards"];
[picker setSubject:@"Flashcards"];
[picker setToRecipients:recipients];
[picker setMessageBody:@"Hello" isHTML:NO];
[picker setMailComposeDelegate:self];
[self presentViewController:picker animated:YES completion:nil];
[self dismissViewControllerAnimated:YES completion:nil];
正在发送电子邮件，似乎一切正常，但没有发送 PDF 文件。
编辑：
这实际上有效，我在代码的其他部分遇到了其他问题。我的问题解决了。我还确保扩展名是正确的，而不是将 FlashCards 作为文件名，它应该是 FlashCards.pdf 这是我工作的确切代码：
MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
NSArray *recipients = @[@"android.aaron.david@gmail.com"];
NSString *path = [[NSBundle mainBundle] pathForResource:@"FlashCards" ofType:@"pdf"];
NSData *myData = [NSData dataWithContentsOfFile:path];
[picker addAttachmentData:myData mimeType:@"application/pdf" fileName:@"FlashCards.pdf"];
[picker setSubject:@"Flashcards"];
[picker setToRecipients:recipients];
[picker setMessageBody:@"Hello" isHTML:NO];
[picker setMailComposeDelegate:self];
[self presentViewController:picker animated:YES completion:nil];