VR+全景播放器+头控讲解-05

self.pinchGesture = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinchGesture:)];
[view addGestureRecognizer:self.pinchGesture];

   -(void)pinchGesture:(UIPinchGestureRecognizer*)pinchGesture{
    if (pinchGesture.state != UIGestureRecognizerStateEnded &&   pinchGesture.state != UIGestureRecognizerStateFailed) {
      if (pinchGesture.scale != NAN && pinchGesture.scale != 0.0) {
          float scale = pinchGesture.scale - 1;
          if (scale < 0) scale *= (sScaleMax - sScaleMin);
          _currentScale = scale + _prevScale;
          _currentScale = [self validateScale:_currentScale];
          CGFloat valScale = [self validateScale:_currentScale];
          double xFov = CAMERA_FOX * (1-(valScale-1)*0.15);
          double yFov = CAMERA_HEIGHT * (1-(valScale-1)*0.15);
      }
    } else if(pinchGesture.state == UIGestureRecognizerStateEnded){
      _prevScale = _currentScale;
    }
    }
-(float)validateScale:(float)scale{
  if (scale < sScaleMin)
      scale = sScaleMin;
  else if (scale > sScaleMax) scale = sScaleMax;
  return scale;
}

self.eyeNode.camera.xFov = xFov;
self.eyeNode.camera.yFov = yFor;