Unity设置横竖屏
使用开发工具设置（工程统一设置）
使用代码设置（可以分开设置不同场景）
竖屏
Screen.orientation = ScreenOrientation.Portrait;
Screen.autorotateToPortrait = true;
Screen.autorotateToPortraitUpsideDown = true;
Screen.autorotateToLandscapeLeft = false;
Screen.autorotateToLandscapeRight = false;
横屏
Screen.orientation = ScreenOrientation.AutoRotation;
Screen.autorotateToPortrait = false;
Screen.autorotateToPortraitUpsideDown = false;
Screen.autorotateToLandscapeLeft = true;
Screen.autorotateToLandscapeRight = true;