试试这个......这个对我有用
MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init]; picker.mailComposeDelegate = self; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *WritableDBPath= [documentsDirectory stringByAppendingPathComponent:kFilename];
NSData *data = [NSData dataWithContentsOfFile:WritableDBPath];
[picker addAttachmentData:data mimeType:@"application/zip" fileName:@"/abc.zip"];
[picker setSubject:@"Database"];
[picker setMessageBody:@"Database testing" isHTML:NO];
[self presentModalViewController:picker animated:YES];
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