From 20ad425407969ca8786055348a94af60911fe0d3 Mon Sep 17 00:00:00 2001
From: WenhaiLin <wenhai.lin@chukong-inc.com>
Date: Wed, 11 Feb 2015 16:28:43 +0800
Subject: [PATCH] Fixed Accelerometer has lagged on iOS

---
 cocos/platform/ios/CCDevice-ios.mm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cocos/platform/ios/CCDevice-ios.mm b/cocos/platform/ios/CCDevice-ios.mm
index f991493bb4..471f41e8f1 100644
--- a/cocos/platform/ios/CCDevice-ios.mm
+++ b/cocos/platform/ios/CCDevice-ios.mm
@@ -38,6 +38,8 @@
 #import<CoreMotion/CoreMotion.h>
 #import<CoreFoundation/CoreFoundation.h>
 
+#define SENSOR_DELAY_GAME 0.02
+
 @interface CCAccelerometerDispatcher : NSObject<UIAccelerometerDelegate>
 {
     cocos2d::Acceleration *_acceleration;
@@ -69,6 +71,7 @@ static CCAccelerometerDispatcher* s_pAccelerometerDispatcher;
     if( (self = [super init]) ) {
         _acceleration = new cocos2d::Acceleration();
         _motionManager = [[CMMotionManager alloc] init];
+        _motionManager.accelerometerUpdateInterval = SENSOR_DELAY_GAME;
     }
     return self;
 }