I am playing with TodayExtension in iOS 8 and I wondered how to apply that blur effect to the Text or to buttons. I already figured out that it has something to do with UIVi
I was able to achieve the "Bearbeiten" button using AYVibrantButton with the AYVibrantButtonStyleFill style:
// Create the button
AYVibrantButton* moreButton = [[AYVibrantButton alloc] initWithFrame:CGRectMake(0, 0, 210, 30) style:AYVibrantButtonStyleFill];
// Set the vibrancy effect to the one provided by notification center
moreButton.vibrancyEffect = [UIVibrancyEffect notificationCenterVibrancyEffect];
// Setup basic button properties
moreButton.text = @"Show More..";
moreButton.font = [UIFont systemFontOfSize:13.0];
// Add it to your view
[self.view addSubview:moreButton];