UIActivityViewController *activityView = [[UIActivityViewController alloc] initWithActivityItems:@[@"这里是标题", [UIImage imageNamed:@"Oauth"], [NSURL URLWithString:@"http://www.google.com"]] applicationActivities:activity];
    activityView.excludedActivityTypes = @[UIActivityTypeAssignToContact, UIActivityTypeCopyToPasteboard, UIActivityTypePrint];
[self presentViewController:activityView animated:YES completion:nil];