title: DJIGimbalRotation can use in p4 p 4 pro ,but can't use spark
body: <p>I work on a project that takes photo use DJI ,and I rotate the camera to ground ,and I can take photo use this method</p>
  
  <p>rotation = [DJIGimbalRotation gimbalRotationWithPitchValue:[NSNumber numberWithInt:-90] rollValue:nil yawValue:nil time:0.01f mode:DJIGimbalRotationModeAbsoluteAngle];</p>
  
  <p>but when I use this method in dpi spark, I got an error and it tells me failed ,how can I make the camera to ground in Spark ,anyone can help me ? </p>