通过电子邮件导出文档目录中的SQLite文件

Question

当用户点击exportAllData按钮时，我试图通过位于文档目录中的电子邮件导出SQLite文件。使用下面的代码，我能够打开邮件应用程序并附加文件。但是，当我发送它时，该文件不会随电子邮件一起发送。

- (IBAction)exportAllDataButtonPressed:(id)sender
{
    MFMailComposeViewController *composer=[[MFMailComposeViewController alloc]init];
    composer.mailComposeDelegate = self;
    if ([MFMailComposeViewController canSendMail])
    {
    [composer setToRecipients:[NSArray arrayWithObjects:@"[email protected]",nil]];
    [composer setSubject:@"SQLite File"];
    [composer setMessageBody:@"This is your SQLite file" isHTML:NO];

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);

    NSString *documentDirectory = [paths objectAtIndex:0];
    NSString *path = [documentDirectory stringByAppendingPathComponent:@"mooddb.sql"];
    NSData *myData = [NSData dataWithContentsOfFile:path];

    [composer addAttachmentData:myData mimeType:@"application/x-sqlite3" fileName:path];
    [self presentViewController:composer animated:YES completion:nil];
    }
}

Answer 1

[composer addAttachmentData:myData mimeType:@"application/x-sqlite3" fileName:path]; 

在FileName中你正在发送路径...... 所以plz chege路径到文件名.. 喜欢..

[composer addAttachmentData:myData mimeType:@"application/x-sqlite3" fileName:@"mooddb.sql"];  

Answer 2

事实证明我在错误的目录中搜索。

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);

应该：

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

Answer 3

Swift版本

@IBAction func exportAllDataButtonTapped(_ sender: Any) {

    guard MFMailComposeViewController.canSendMail() == true else { return }

    let mailCompose = MFMailComposeViewController()
    mailCompose.mailComposeDelegate = self
    mailCompose.setSubject("Sqlite File")
    mailCompose.setMessageBody("", isHTML: false)

    if let documentsPathURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first {
        let fileName = "myDatabase.sqlite"
        let fullURL = documentsPathURL.appendingPathComponent(fileName)
        if let data = try? Data(contentsOf: fullURL) {
            mailCompose.addAttachmentData(data, mimeType: "application/x-sqlite3", fileName: fileName)
        }
    }

    present(mailCompose, animated: true, completion: nil)
}