From 4b7d1d8c15747a552b7dff52b0eeda4d3e7cec4e Mon Sep 17 00:00:00 2001
From: BastiaanOlij <mux213@gmail.com>
Date: Tue, 21 Mar 2017 23:50:53 +1100
Subject: [PATCH] Fixing magnetometer on iOS

---
 platform/iphone/app_delegate.mm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platform/iphone/app_delegate.mm b/platform/iphone/app_delegate.mm
index 7a48629ea1..bd96ba8e2d 100644
--- a/platform/iphone/app_delegate.mm
+++ b/platform/iphone/app_delegate.mm
@@ -299,7 +299,7 @@ static int frame_count = 0;
  		motionManager = [[CMMotionManager alloc] init];
  		if (motionManager.deviceMotionAvailable) {
  			motionManager.deviceMotionUpdateInterval = 1.0/70.0;
- 			[motionManager startDeviceMotionUpdates];			
+ 			[motionManager startDeviceMotionUpdatesUsingReferenceFrame:CMAttitudeReferenceFrameXMagneticNorthZVertical];			
 			motionInitialised = YES;
  		};
  	};