Find Photo in Directory! (Programmatically) - iphone

Question

Holy Dudes from stackoverflow,
MY PROBLEM: I need to send an email with 3 attachments. The first that is the .txt, is going well, no problems with him, but the problem is with the pictures. I capture a printscreen with this:
-(IBAction)screenShot{
maintimer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:#selector(update) userInfo:nil repeats:YES];
}
-(void)update{
time = time + 1;
if(time == 2){
[self hideThem]; //hides the buttons
UIGraphicsBeginImageContext(self.bounds.size);
[self.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *screenImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(screenImage, nil, nil, nil);
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"GRAPH SAVED" message:#"YOUR GRAPH HAS BEEN SAVEN IN THE PHOTO ALBUM" delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
[alert release];
[maintimer invalidate];
time = 0;
}
[self bringThem]; //brings the buttons back
}
But now i need to get this image i created! I tried using the same code i use for the text:
-(IBAction)sendMail
{
(..)
//HERE IS WHERE THE NAME IS GIVEN
NSString *filename = [NSString stringWithFormat:#"%f.txt", [[NSDate date] timeIntervalSince1970]];
//THIS IS GOING TO STORE MY MESSAGE STUFF
NSString *content = [[NSMutableString alloc]init];
(...) //LOTS OF UNNECESSARY CODE
//HERE IS WHERE IT BILDS THE FILE
[self writeToTextFile:filename content:content];
//HERE IS THE CODE WHERE IT ATTACHES THE FILE
[self sendMailWithFile:filename];
//[content release];
}
-(void)sendMailWithFile : (NSString *)file
{
//THIS IS THE CODE THAT GETS THE TEXT
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fileName = [NSString stringWithFormat:#"%#/%#", documentsDirectory, file];
NSData *data = [[NSData alloc] initWithContentsOfFile:fileName];
//THIS WAS MY TRY TO GET THE PHOTO ON THE SAME STYLE OF THE TEXT
NSArray *photoPath = NSSearchPathForDirectoriesInDomains(NSPicturesDirectory, NSUserDomainMask, YES);
NSString *photoDirectoryForFirstPhoto = [photoPath objectAtIndex:0];
NSString *photoName_First = [NSString stringWithFormat:#"%#/%#", photoDirectoryForFirstPhoto, /*I DO NOT HAVE THE PHOTO NAME*/#"FirstPhoto"];
NSData *photoData_First = [[NSData alloc] initWithContentsOfFile:photoName_First];
MFMailComposeViewController *mailComposer = [[MFMailComposeViewController alloc] init];
if ([MFMailComposeViewController canSendMail])
{
mailComposer = [[MFMailComposeViewController alloc] init];
mailComposer.mailComposeDelegate = self;
[mailComposer setSubject:#"RK4 data"];
[mailComposer addAttachmentData:data mimeType:#"text/plain" fileName:#"[RK4][EQUATION][TEXT]"];
[mailComposer addAttachmentData:photoData_First mimeType:#"image/png" fileName:#"[RK4][EQUATION][IMAGE]"];
[mailComposer setMessageBody:#"iCalculus Runge-Kutta data." isHTML:NO];
[self presentModalViewController:mailComposer animated:YES];
}
else (...)
[mailComposer release];
[data release];
}
So that's my problem. I need to find a way to get the printscreen i took and attach it.
Because i need to come up with all the attaches in the email as soon as he clicks the "SEND MAIL" button.
Thanks.

Answer 1

Rather than saving to your photo library, you should save to documents directory, or tmp directory, to get documents directory you can use the following.
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString* dd = [paths objectAtIndex:0];
NSString *path = [dd stringByAppendingPathComponent:#"file.png"];
[UIImagePNGRepresentation(screenImage) writeToFile:path atomically:NO];

Answer 2

Take a look here for how to embed the image directly inside the email using base-64, that should be much cleaner than dumping temporary images to the users saved photos album.
Edit:
Category for handling base 64 with NSData, use the download towards the bottom.