Cocos2d: Controller calling method of a CCNode - cocos2d-iphone

Question

My GameController.m calls a method of CCNode class. It seems to call it as I can see NSLog but the method is not either operate or not result in view. In other words, screen does not change when calling the method from GameController. (method operates itself in its own class)
How should I change my code to fix it?
Summary:
GameController -> calls -> GoalPost.GoalKeeper.method.
Code:
GameController.m, GoalPost.m and GoalKeeper.m
GameController.m
#import "GameController.h"
#import "cocos2d-ui.h"
#import "GoalPost.h"
#import "Ball.h"
#import "Field.h"
#interface GameController()
#property Field* field;
//#property Ball* ball;
#property GoalPost* post;
#end
#implementation GameController
- (instancetype)init
{
self = [super init];
if (self) {
self.field = [Field node];
// self.ball = [Ball node];
self.post = [GoalPost node];
}
return self;
}
//control computer.
-(void)kickerTurn{
NSLog(#"Player kick");
//random location generation
//call keeper.
int randomKeeperX = arc4random() % (int)self.post.contentSize.width;
int randomKeeperY = arc4random() % (int)self.post.contentSize.height;
CGPoint keeperLoc = ccp(randomKeeperX, randomKeeperY);
[self.post.keeper keeperLocation:keeperLoc];
}
#end
GoalPost.h
#import "GoalKeeper.h"
#interface GoalPost : CCNodeColor { }
#property GoalKeeper* keeper;
#end
GoalPost.m
#import "GoalPost.h"
#import "GoalKeeper.h"
#interface GoalPost ()
#property NSArray* post;
#end
#implementation GoalPost
- (instancetype)init
{
self = [super initWithColor:[CCColor lightGrayColor]];
if (self) {
....
[self addChild:aPost];
}
//Call goal keeper and add.
//for touch to run goal keeper.
[self setUserInteractionEnabled:true];
self.keeper = [GoalKeeper node];
//Put it in front of goal post.
self.keeper.position = ccp(self.contentSize.width/2, 0);
[self addChild:self.keeper];
}
return self;
}
-(void)touchBegan:(UITouch *)touch withEvent:(UIEvent *)event{
CGPoint touchLoc = [touch locationInNode:self];
NSLog(#"Goal touched: %f %f", touchLoc.x, touchLoc.y);
//Goal keeper call
[self.keeper keeperLocation:touchLoc];
}
#end
Finally, GoalKeeper.m
.h
#import "cocos2d.h"
#interface GoalKeeper : CCNodeColor { }
-(void)keeperLocation:(CGPoint)location;
#end
.m
#import "GoalKeeper.h"
#interface GoalKeeper()
#property CGPoint touchLoc;
#end
#implementation GoalKeeper
- (instancetype)init
{
self = [super initWithColor:[CCColor blueColor]];
if (self) {
[self setUserInteractionEnabled:TRUE];
[self setContentSize:CGSizeMake(30, 70)];
}
return self;
}
-(void)keeperLocation:(CGPoint)location {
CGPoint offset = ccpSub(location, self.position);
int targetX = self.position.x + offset.x;
int targetY = self.position.y + offset.y;
CGPoint targetPosition = ccp(targetX, targetY);
CCActionMoveBy *actionMoveBy = [CCActionMoveBy actionWithDuration:0.5f position:offset];
[self runAction:actionMoveBy];
}
#end