unity 陀螺仪判断手机方向

首先说一下为什么用陀螺仪，很多时候当ios设备系统级别锁定方向后，我们使用ios系统的设备方向方法将不能其作用。 ios系统代码中为一下代码：

//下面代码只有在设备系统不锁定屏幕旋转是Natifications 方法才起作用。
- (void) addDeviceRotateObserver {
  [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
  [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(rotateViews:)
                                             name:UIDeviceOrientationDidChangeNotification
                                           object:nil];
}

- (void) rotateViews:(NSObject *)sender {

UIDevice* device = [sender valueForKey:@"object"];
NSLog(@"%d",device.orientation);

//   switch (device.orientation) {
//       case UIDeviceOrientationPortrait: {
//            NSLog(@"P");
//            break;
//        }
//        case UIDeviceOrientationLandscapeLeft: {
//            NSLog(@"LL");
//            break;
//        }
//        case UIDeviceOrientationLandscapeRight: {
//            NSLog(@"LR");
//            break;
//        }
//        default:
//            break;
//    }

switch (device.orientation) {
    case UIDeviceOrientationUnknown: {
        // do something
        break;
    }
    case UIDeviceOrientationPortrait: {
        // do something
        break;
    }
    case UIDeviceOrientationPortraitUpsideDown: {
        // do something
        break;
    }
    case UIDeviceOrientationLandscapeLeft: {
        // do something
        break;
    }
    case UIDeviceOrientationLandscapeRight: {
        // do something
        break;
    }
    case UIDeviceOrientationFaceUp: {
        // do something
        break;
    }
    case UIDeviceOrientationFaceDown: {
        // do something
        break;
    }
}

}

以下为陀螺仪代码，直接在unity中使用

void CheckOrientation()
{
    if (Mathf.Abs(Input.gyro.gravity.z) <= 0.9f)
    {
        
        if (Mathf.Abs(Input.gyro.gravity.x) > Mathf.Abs(Input.gyro.gravity.y))
        {
            if (Input.gyro.gravity.x > 0f)
            {
                unknown = DeviceOrientation.LandscapeRight;
                
Rotation.z);
        
                Debug.Log("DeviceOrientation111=="+Input.deviceOrientation);
                
            }
            else
            {
                unknown = DeviceOrientation.LandscapeLeft;
                Rotation.z);
        
                Debug.Log("DeviceOrientation222=="+Input.deviceOrientation);
                
            }
        }
        else if (Input.gyro.gravity.y > 0f)
        {
            unknown =  DeviceOrientation.PortraitUpsideDown;
            
            Debug.Log("DeviceOrientation4444=="+Input.deviceOrientation);
            
            
        }
        else
        {
            unknown = DeviceOrientation.Portrait;
            
            Debug.Log("DeviceOrientation3333=="+Input.deviceOrientation);
            
        }
        currentDeviceOrientation = unknown;
    }
}

}