Define Mail Subject Using NSSharingService

Question

How do you define the subject for a Mail message composed with NSSharingService?

I've been through the NSSharingService Class reference , but am not seeing it defined anywhere. The following successfully launches mail app, but subject is just shoved into the mail body along with the text.

NSAttributedString *text = [self.noteSynopsisView attributedString];
NSString *subject = @"My Subject";
NSArray *shareItems = [NSArray arrayWithObjects:text, subject, nil];
NSSharingServicePicker *sharingServicePicker = [[NSSharingServicePicker alloc] initWithItems:shareItems];
sharingServicePicker.delegate = self;
[sharingServicePicker showRelativeToRect:[self.shareButton bounds] ofView:self.shareButton preferredEdge:NSMaxYEdge];

In iOS, you'd normally do something like the following to define a subject for the MailComposer

[sharingServicePicker setSubject:@"My Subject"];

But SharingServicePicker does not support setSubject.

Answer 1

从OS X 10.9开始， NSSharingService具有您可以使用的subject属性。

Answer 2

Implement the next method:

-(id<NSSharingServiceDelegate>)sharingServicePicker:(NSSharingServicePicker *)sharingServicePicker delegateForSharingService:(NSSharingService *)sharingService{
    sharingService.subject=@"Subject";
    return self;
}