【求助】这代码看不懂 是什么意思

点进去就是这段有问题
#if UNITY_IPHONE || UNITY_ANDROID
TouchScreenKeyboard.autorotateToPortrait = autoRotateKeyboardPortrait;
TouchScreenKeyboard.autorotateToPortraitUpsideDown = autoRotateKeyboardPortraitUpsideDown;
TouchScreenKeyboard.autorotateToLandscapeLeft = autoRotateKeyboardLandscapeLeft;
TouchScreenKeyboard.autorotateToLandscapeRight = autoRotateKeyboardLandscapeRight;