#import "BlurAmount.h" #import @interface UIBlurEffect (Protected) @property (nonatomic, readonly) id effectSettings; @end @implementation BlurAmount NSNumber *localBlurAmount; + (instancetype)effectWithStyle:(UIBlurEffectStyle)style { id result = [super effectWithStyle:style]; object_setClass(result, self); return result; } - (id)effectSettings { id settings = [super effectSettings]; [settings setValue:localBlurAmount forKey:@"blurRadius"]; return settings; } - (id)copyWithZone:(NSZone*)zone { id result = [super copyWithZone:zone]; object_setClass(result, [self class]); return result; } + (id)updateBlurAmount:(NSNumber*)blurAmount { localBlurAmount = blurAmount; return blurAmount; } @end