objective-c - あるクラスから別のクラスの関数を呼び出す方法

Question

ThisWillWorkLayer と ThisWillWorkScene の 2 つのクラスがあります。

ThisWillWorkLayer.m

#import "ThisWillWorkLayer.h"
#import "ThisWillWorkScene.h"


@implementation ThisWillWorkLayer


#define kSwipeScale 0.6

-(void) ccTouchMoved: (UITouch *)touch withEvent: (UIEvent *)event {


    CGPoint touchPoint = [touch locationInView:[touch view]];
    touchPoint = [[CCDirector sharedDirector] convertToGL:touchPoint];

    NSLog(@"Touch at x:%d y:%d",(int)touchPoint.x,(int)touchPoint.y);

    [ThisWillWorkScene rotate:touchPoint];
}


@end

ccTouchMoved 関数は、スワイプが行われるたびに実行されます。私のエラーは関数の最後の行にあります。 [ThisWillWorkScene rotate:touchPoint];回転機能が存在しないと言われています。ただし、 ThisWillWorkScene クラスを見ると、そうであるように見えます

ThisWillWorkScene.h

#import "CC3Scene.h"

/** A sample application-specific CC3Scene subclass.*/
@interface ThisWillWorkScene : CC3Scene {
    CGPoint lastPoint;
    CC3Camera* cam;

}

-(void) rotate: (CGPoint) touchPoint;

@end

ThisWillWorkScene.m

@implementation ThisWillWorkScene


#define kSwipeScale 0.6

-(void) rotate: (CGPoint) touchPoint{

    //CC3Camera* cam = self.activeCamera;

    // Get the direction and length of the movement since the last touch move event, in
    // 2D screen coordinates. The 2D rotation axis is perpendicular to this movement.
    CGPoint swipe2d = ccpSub(touchPoint, lastPoint);
    CGPoint axis2d = ccpPerp(swipe2d);

    // Project the 2D axis into a 3D axis by mapping the 2D X & Y screen coords
    // to the camera's rightDirection and upDirection, respectively.
    CC3Vector axis = CC3VectorAdd(CC3VectorScaleUniform(cam.rightDirection, axis2d.x),
                                  CC3VectorScaleUniform(cam.upDirection, axis2d.y));
    GLfloat angle = ccpLength(swipe2d) * kSwipeScale;

    // Rotate the cube under direct finger control, by directly rotating by the angle
    // and axis determined by the swipe. If the die cube is just to be directly controlled
    // by finger movement, and is not to freewheel, this is all we have to do.
    CC3MeshNode* helloTxt = (CC3MeshNode*)[self getNodeNamed: @"Hello"];
    [helloTxt rotateByAngle: angle aroundAxis: axis];

    lastPoint = touchPoint;

}


@end

だから私の質問は、ThisWillWorkLayer 内から回転関数を呼び出す適切な方法は何ですか