Setting email sender and recipient from share sheet (ios)

Question

Goal: implement a sharesheet (UIActivityViewController) that includes Gmail as an option, and sets the recipient and subject

Problem: setting subject works, but setting recipient (forKey: "to") crashes the program.

I would like to have the ability to set the sender and recipient field of the share sheet email client, but so far I have been unable to find any way of doing this. Any help is appreciated!

Relevant code:

let email = ["[email protected]"] let activityVC = UIActivityViewController(activityItems: [""], applicationActivities: nil) activityVC.excludedActivityTypes = excludedActivity activityVC.setValue("Subject Title", forKey: "subject") activityVC.setValue(email[0], forKey: "to") activityVC.popoverPresentationController?.sourceView = self.view self.presentViewController(activityVC, animated: true, completion: nil)

See this question stackoverflow.com/questions/17020288/… Additionally the documentation for UIActivityItemSource developer.apple.com/library/ios/documentation/UIKit/Reference/…: — naomimichiko
– naomimichiko, Commented Aug 16, 2016 at 21:50

Christian Abella · Accepted Answer · 2016-08-16 23:01:51Z

You can only set the Subject for UIActivityViewController. The program crashes because there is no "to" key. You will have to use the MailMFComposeViewController if you want to set the recipients and sender fields.

 if !MFMailComposeViewController.canSendMail() { let alertMsg = UIAlertController(title: "Test", message: "Mail services not available.", preferredStyle: UIAlertControllerStyle.Alert) alertMsg.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil)) self.presentViewController(alertMsg, animated: true, completion: nil) } else { let composeVC = MFMailComposeViewController() composeVC.mailComposeDelegate = self // Configure the fields of the interface. composeVC.setToRecipients(["[email protected]"]) composeVC.setSubject("Subject) composeVC.setMessageBody("Hi.", isHTML: false) // Present the view controller modally. self.presentViewController(composeVC, animated: true, completion: nil) }

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