System/Library/PrivateFrameworks/SpringBoard.framework

_SBAdaptiveKeyLineBackdropView.h

Download _SBAdaptiveKeyLineBackdropView.h

1. NSObject
2. >
3. UIResponder
4. >
5. UIView

@interface _SBAdaptiveKeyLineBackdropView : UIView

+ (Class)layerClass;

- (id)backdropLayer;

@end