Xcode iPhone accelerometer image - iphone

Question

I'm French so excuse me for my English. So I use an accelerometer, but in my code the accelerometer works for a view and not for an image. What I want to do is to use this accelerometer for an image instead of a view. How can I do this? Here is the code:
#define CONST_fps 100.
#define CONST_map_shift 0.01
#define kFilteringFactor 0.1
UIAccelerationValue rollingX, rollingY, rollingZ;
#implementation MapViewRotationViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// accelerometer settings
[[UIAccelerometer sharedAccelerometer] setDelegate:self];
[[UIAccelerometer sharedAccelerometer] setUpdateInterval:(1.0 / CONST_fps)];
}
- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration
{
rollingX = (acceleration.x * kFilteringFactor) + (rollingX * (1.0 - kFilteringFactor));
rollingY = (acceleration.y * kFilteringFactor) + (rollingY * (1.0 - kFilteringFactor));
rollingZ = (acceleration.z * kFilteringFactor) + (rollingZ * (1.0 - kFilteringFactor));
float accelX = acceleration.x - rollingX;
float accelY = acceleration.y - rollingY;
float accelZ = acceleration.z - rollingZ;
static CGFloat ZZ = 0.;
CGFloat z = (atan2(rollingX, rollingY) + M_PI);
if (fabsf(ZZ - z) > CONST_map_shift)
{
viewToRotate.layer.transform = CATransform3DMakeRotation(ZZ=z, 0., 0., 1.);
}
}
#end

Answer 1

You don't need to have a view as callback instead you can choose any class to conform to protocol UIAccelerometerDelegate. Just declare your class in the header file as
#interface MyClass : NSObject <UIAccelerometerDelegate> {
// my members
}
In MyClass.m you have to implement method
- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {
// do what you like
}
But if you are not forced to support iOS version 3.x, you should consider using CoreMotion API. See Event Handling Guide for iOS / Motion Events for more information and samples.