UIActivityViewController显示不必要的行

如何解决UIActivityViewController显示不必要的行

我在UIActivityViewController上收到不必要的一行。在我看来，这是UIActivityViewController的顶部边框，因为当我将其滚动到顶部时，它移到顶部，然后再次到达其实际位置，如屏幕截图所示。 代码：

NSURL *myWebsite = [NSURL URLWithString:@"https://www.google.com"];
NSArray *objectsToShare = @[myWebsite];
UIActivityViewController *activityVC = [[UIActivityViewController alloc] initWithActivityItems:objectsToShare applicationActivities:nil];
NSArray *excludeActivities = @[UIActivityTypeAirDrop,UIActivityTypeAssignToContact,UIActivityTypeSavetoCameraRoll,UIActivityTypeAddToReadingList];
activityVC.excludedActivityTypes = excludeActivities;
[self presentViewController:activityVC animated:YES completion:nil];