Find Photo in Directory! (Programmatically)

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.

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];

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.