See Also: UIInterpolatingMotionEffect Members
Objects of the instance UIInterpolatingMotionEffect take the values of the hardware tilt and map those into a range (specified by the properties MinimumRelativeValue and MaximumRelativeValue) and then it applies that to the property referenced by the keypath.
The delta computed is then applied to the property.
The following example adds two square views, a reference one, and a semi-transparent one that has two interpolating motion effect handlers, one for the center.X position and one for center.y.
C# Example
class MotionSquareViewController : UIViewController {
public MotionSquareViewController () : base() {
}
public override void ViewDidLoad ()
{
var reference = new UIView (new RectangleF (110, 110, 90, 90)) {
BackgroundColor = UIColor.Blue
};
var tracking = new UIView (new RectangleF (100, 100, 100, 100)) {
BackgroundColor = UIColor.FromRGBA (.5f, .5f, .5f, .5f)
};
View.AddSubviews (reference, tracking);
var mx = new UIInterpolatingMotionEffect ("center.x", UIInterpolatingMotionEffectType.TiltAlongHorizontalAxis) {
MinimumRelativeValue = new NSNumber (-100),
MaximumRelativeValue = new NSNumber (100)
};
var my = new UIInterpolatingMotionEffect ("center.y", UIInterpolatingMotionEffectType.TiltAlongVerticalAxis) {
MinimumRelativeValue = new NSNumber (-100),
MaximumRelativeValue = new NSNumber (100)
};
tracking.AddMotionEffect (mx);
tracking.AddMotionEffect (my);
}
}