NEVideoLowlightEnhanceLevel @objc public enum NEVideoLowlightEnhanceLevel : UInt 低光环境增强级别。 quality 低光环境增强级别:优先进行画质增强,暗部增强明显 Declaration Swift case quality = 1 balance 低光环境增强级别:只增强暗部 Declaration Swift case balance = 2 auto 低光环境增强级别:根据画面整体亮度决定是否进行增强 Declaration Swift case auto = 3