// works fine
		CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"opacity"];
		NSNumber *value = [NSNumber numberWithFloat:0.0];

		animation.duration = 3.0;
		animation.fromValue = [NSNumber numberWithFloat:1.0];
		animation.toValue = value;

		[layer addAnimation:animation forKey:@"opacity"];
		[layer setValue:value forKey:@"opacity"];