iphone - 如何截取 View 的屏幕截图并通过电子邮件发送？

Question

我能否让我的应用截取 View 内容的屏幕截图并将其附加到电子邮件中？怎么办？

Answer 1

您可以将 View 转换为图像，然后可以用它创建电子邮件。

此代码 ( from here) 将允许您发送带有附件的电子邮件:

    - (void)emailImageWithImageData:(NSData *)data
    {
      MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
      picker.mailComposeDelegate = self;

      // Set the subject of email
      [picker setSubject:@"Picture from my iPhone!"];

      // Add email addresses
      // Notice three sections: "to" "cc" and "bcc" 
      [picker setToRecipients:[NSArray arrayWithObjects:@"emailaddress1@domainName.com", @"emailaddress2@domainName.com", nil]];
      [picker setCcRecipients:[NSArray arrayWithObject:@"emailaddress3@domainName.com"]];   
      [picker setBccRecipients:[NSArray arrayWithObject:@"emailaddress4@domainName.com"]];

      //    Fill out the email body text
      NSString *emailBody = @"I just took this picture, check it out.";

      // This is not an HTML formatted email
      [picker setMessageBody:emailBody isHTML:NO];

      // Attach image data to the email
      // 'CameraImage.png' is the file name that will be attached to the email
      [picker addAttachmentData:data mimeType:@"image/png" fileName:@"CameraImage"];

      // Show email view    
      [self presentModalViewController:picker animated:YES];
      //if you have a navigation controller: use that to present, else the user will not
      //be able to tap the send/cancel buttons
      //[self.navigationController presentModalViewController:picker animated:YES];


      // Release picker
      [picker release];
    }

    - (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error 
     {
       // Called once the email is sent
       // Remove the email view controller  
       [self dismissModalViewControllerAnimated:YES];
     }

要将您的 View 图形表示转换为图像，请使用代码 ( from here ):

UIGraphicsBeginImageContext(self.window.bounds.size);
[self.window.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSData * data = UIImagePNGRepresentation(image);

[self emailImageWithImageData:data];