ios - 从文档目录 Objective c 发送带有 pdf 附件的电子邮件

Question

我在让我的程序接受我给它的路径并将其作为 NSData 返回时遇到问题

    // Get the resource path and read the file using NSData


NSString *searchFilename = @"SafetyAuditReport.pdf"; // name of the PDF you are searching for

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSDirectoryEnumerator *direnum = [[NSFileManager defaultManager] enumeratorAtPath:documentsDirectory];

NSString *documentsSubpath;
while (documentsSubpath = [direnum nextObject])
{
    if (![documentsSubpath.lastPathComponent isEqual:searchFilename]) {
        continue;
    }

    NSLog(@"found %@", documentsSubpath);
}

NSData *pdfData = [NSData dataWithContentsOfFile:documentsSubpath];


// Determine the MIME type
NSString *mimeType = @"application/pdf";




MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init];
mc.mailComposeDelegate = self;
[mc setSubject:emailTitle];
[mc setMessageBody:messageBody isHTML:NO];
[mc setToRecipients:toRecipents];
[mc addAttachmentData:pdfData mimeType:mimeType fileName:@""];

NSLog(@"data was loaded......."); 
// Present mail view controller on screen
[self presentViewController:mc animated:YES completion:nil];

当程序获取电子邮件部分时，它会为 addAttachmentData:pdfData mimeType:mimeType fileName: 抛出一个 nil 异常，表示我给它的变量是 nil (pdfData) 当我知道文件存在于文档目录中时。

提前致谢

Answer 1

请使用此代码

- (IBAction)sendMailWithAttachedFile
{

    MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
    picker.mailComposeDelegate = self;
    //    NSURL* outputURL = [[NSURL alloc] initFileURLWithPath:[self pathForResourse:fileName ofType:extension]];


    //Get the file path
    NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSString *path = [documentsDirectory stringByAppendingPathComponent:@"data.pdf"];

    NSURL* outputURL = [[NSURL alloc] initFileURLWithPath:path];
    NSData *data=[[NSData alloc]initWithContentsOfURL:outputURL];
    [picker addAttachmentData:data mimeType:@"application/pdf" fileName:@"data.pdf"];
    [self presentModalViewController:picker animated:YES];


}

-(void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error {
    [self dismissViewControllerAnimated:YES completion:nil];
}