How to set a mail Subject in UIActivityViewController?
Check below code for the email for setting up your email subject:
UIActivityViewController* avc = [[UIActivityViewController alloc] initWithActivityItems:@[@"Your String to share"] applicationActivities:nil];[avc setValue:@"Your email Subject" forKey:@"subject"];avc.completionHandler = ^(NSString *activityType, BOOL completed) { // ...};
Here the line
[avc setValue:@"Your email Subject" forKey:@"subject"];
Makes the subject as "Your email Subject" if user picks email option in the UIActivityViewController.
I hope it helps...
It seems as though emreoktem's solution—sending setValue:forKey:
to the UIActivityViewController
—is undocumented.
On iOS 7 and later, you can implement the activityViewController:subjectForActivityType:
method in an object conforming to the UIActivityItemSource
protocol to do this in a way that is documented.
Here's a concrete solution for Swift 3.0+ based on the accepted answer. Note that, like the accepted answer, this is known to work only on the iOS Mail app and not necessarily other apps.
Implementation:
class MessageWithSubject: NSObject, UIActivityItemSource { let subject:String let message:String init(subject: String, message: String) { self.subject = subject self.message = message super.init() } func activityViewControllerPlaceholderItem(_ activityViewController: UIActivityViewController) -> Any { return message } func activityViewController(_ activityViewController: UIActivityViewController, itemForActivityType activityType: UIActivityType) -> Any? { return message } func activityViewController(_ activityViewController: UIActivityViewController, subjectForActivityType activityType: UIActivityType?) -> String { return subject }}
Usage:
Here's an example of usage. Note that it works well to use this as the first item in the activityItems array, and include any additional items to follow:
let message = MessageWithSubject(subject: "Here is the subject", message: "An introductory message")let itemsToShare:[Any] = [ message, image, url, etc ]let controller = UIActivityViewController(activityItems: itemsToShare, applicationActivities: nil)