iOS 调用系统的分享

调用系统的分享 iOS11适配

 UIActivityViewController *activityViewController =[[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];

        activityViewController.excludedActivityTypes = @[UIActivityTypePostToFacebook,UIActivityTypeAirDrop];

        [self presentViewController:activityViewController animated:TRUE completion:nil];