Move to few point with CAKeyframeAnimation - objective-c

Question

I have code :
NSMutableArray * pathArray = [[NSMutableArray alloc]init];
CGPoint currentPoint = CGPointMake(xp, yp);
[pathArray addObject:[NSValue valueWithCGPoint: currentPoint]];
NSMutableArray * pathArray = [algorithm CreatePath];
CGMutablePathRef path = CGPathCreateMutable();
CAKeyframeAnimation *pathAnimation = [CAKeyframeAnimation animationWithKeyPath:#"position"];
pathAnimation.values = pathArray;
pathAnimation.path = path;
pathAnimation.duration = 1.0;
[self.firstBall.ballLayer addAnimation:pathAnimation forKey:#"position"];
And in path array I have few CGPoints wrapped in NSValue. But when animation go its only move from first to last coordinate? Why it not use other points?
New code:
-(void)MoveBallWithAlgorithm:(CGPoint)start end:(CGPoint)end;
{
FindWayAlgorithm *algorithm = [[FindWayAlgorithm alloc]init];
algorithm.LX = algorithm.LY = self.columns;
[algorithm CreateBoard:self.fieldsArray];
[algorithm FindWay:start end:end];
CGMutablePathRef path = CGPathCreateMutable();
NSMutableArray * pathArray = [algorithm CreatePath];
#try
{
CGPathMoveToPoint(path, NULL, self.firstBall.ballCoordinates.x, self.firstBall.ballCoordinates.y);
for (NSValue * pointValue in pathArray) {
CGPoint point = [pointValue CGPointValue];
Field* field = [self FindFieldWithPoint:point];
CGPathAddLineToPoint(path, NULL, field.ballCoordinates.x, field.ballCoordinates.y);
}
}
#catch(NSException* ex)
{
NSLog(#"Bug captured when move ball with algorithm: %# %#",ex, [NSThread callStackSymbols]);
}
CAKeyframeAnimation *pathAnimation = [CAKeyframeAnimation animationWithKeyPath:#"position"];
pathAnimation.duration = 2.0;
pathAnimation.path = path;
[pathAnimation setDelegate:self];
[self.firstBall.ballLayer addAnimation:pathAnimation forKey:#"position"];
}
- (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag{
NSInteger firstBallIndex = [self.fieldsArray indexOfObject:self.firstBall];
NSInteger secondBallIndex = [self.fieldsArray indexOfObject:self.secondBall];
self.ballFrom = [self.fieldsArray objectAtIndex:firstBallIndex];
self.ballTo = [self.fieldsArray objectAtIndex:secondBallIndex];
self.ballTo.ballLayer = self.ballFrom.ballLayer;
CGPoint endPt = CGPointMake(self.secondBall.ballCoordinates.x,self.secondBall.ballCoordinates.y);
self.ballTo.ballLayer.frame = CGRectMake(endPt.x, endPt.y, self.ballSize, self.ballSize);
self.ballFrom.ballLayer = nil;
[self.fieldsArray replaceObjectAtIndex:firstBallIndex withObject:self.ballFrom];
[self.fieldsArray replaceObjectAtIndex:secondBallIndex withObject:self.ballTo];
self.firstBall = nil;
self.secondBall = nil;
}

Answer 1

My problem is resolved. I add:
pathAnimation.fillMode = kCAFillModeForwards;
pathAnimation.removedOnCompletion = NO;
Now my layer not back to first position ;)

Answer 2

The CAKeyframeAnimation documentation states:
Specifying a path overrides the values property.
so you should not set pathAnimation.path if you want to set the keyframe values with
pathAnimation.values = pathArray.
I tested it with a simple label and the following code:
NSArray * pathArray = #[
[NSValue valueWithCGPoint:CGPointMake(10., 10.)],
[NSValue valueWithCGPoint:CGPointMake(100., 10.)],
[NSValue valueWithCGPoint:CGPointMake(10., 100.)],
[NSValue valueWithCGPoint:CGPointMake(10., 10.)],
];
CAKeyframeAnimation *pathAnimation = [CAKeyframeAnimation animationWithKeyPath:#"position"];
pathAnimation.values = pathArray;
pathAnimation.duration = 5.0;
[self.label.layer addAnimation:pathAnimation forKey:#"position"];