in-app Screenshot and attach to email without saving into library

I would like to know what code should i use if i want to make my app able to take a s开发者_StackOverflow社区creenshot of the screen by pressing a UIbutton and immediately pop up and Mail compose and email out the screenshot without saving it into photo library?

Many thanks!

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You will need to add two frameworks to your project - QuartzCore and MessageUI and then do #import <QuartzCore/QuartzCore.h> and #import <MessageUI/MessageUI.h>.

Your button press code should be like,

- (void)buttonPress:(id)sender
{
    UIGraphicsBeginImageContext(self.view.frame.size);
    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage * image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    NSData * imageData = UIImageJPEGRepresentation(image, 1.0);

    if ( [MFMailComposeViewController canSendMail] ) {
        MFMailComposeViewController * mailComposer = [[[MFMailComposeViewController alloc] init] autorelease];
        mailComposer.delegate = self;
        [mailComposer addAttachmentData:imageData mimeType:@"image/jpeg" fileName:@"attachment.jpg"];

        /* Configure other settings */

        [self presentModalViewController:mailComposer animated:YES];
    }
}