[CCActionRepeatForever duration]：无法识别的选择器

Question

我试图使用CCSequence和CCRepeatForever在屏幕上上下移动CCSprite，但我一直收到错误。我的方法的代码如下所示，抛出异常的代码行标有注释。

-(void) beginMovingAtSpeed: (float) speed
    {
        CGSize viewSize = [[CCDirector sharedDirector] viewSize];
        float yMin = viewSize.height * .14f;
        float yMax = viewSize.height * .86f;

        CGPoint start = self.position; // here you will get the current position of your sprite.
        CGPoint end = ccp(self.position.x,yMax);

        float distance = ccpDistance(start, end); // now you have the distance

        float duration = distance/speed;  // here you find the duration required to cover the distance at constant speed

        CCActionMoveTo* firstMove = [CCActionMoveTo actionWithDuration:duration position:CGPointMake(self.position.x, yMin)];
        CCActionMoveTo* secondMove = [CCActionMoveTo actionWithDuration:speed position:CGPointMake(self.position.x, yMax)];
        CCActionMoveTo* thirdMove = [CCActionMoveTo actionWithDuration:speed position:CGPointMake(self.position.x, yMin)];

        id repeatSequence = [CCActionRepeatForever actionWithAction:[CCActionSequence actionOne:secondMove two:thirdMove]];

        // THIS IS THE OFFENDING LINE
        CCActionSequence* finalSequence = [CCActionSequence  actionOne:firstMove two:repeatSequence];

        [self runAction: finalSequence];
    }

以防其他人遇到此问题，CCActionCallBlock是我的解决方案，以下代码是我的解决方法：

{
    CGSize viewSize;
    float yMin;
    float yMax;
}
    -(void) beginMovingAtSpeed: (float) speed
    {
        viewSize = [[CCDirector sharedDirector] viewSize];
        yMin = viewSize.height * .14f;
        yMax = viewSize.height * .86f;

        CGPoint start = self.position; // here you will get the current position of your sprite.
        CGPoint end = ccp(self.position.x,yMax);

        float distance = ccpDistance(start, end); // now you have the distance

        float duration = distance/speed;  // here you find the duration required to cover the distance at constant speed

        CCActionMoveTo* firstMove = [CCActionMoveTo actionWithDuration:duration position:CGPointMake(self.position.x, yMin)];

        CCActionSequence* sequence = [CCActionSequence actionOne:firstMove two:
                                      [CCActionCallBlock actionWithBlock:^
                                       {
                                           [self performSelector:@selector(startAutomaticBarMovement:) withObject:[NSNumber numberWithFloat:speed]];
                                   }]];

        [self runAction: sequence];
    }

-(void) startAutomaticBarMovement: (NSNumber*) duration
{
    CCActionMoveTo* secondMove = [CCActionMoveTo actionWithDuration:[duration floatValue] position:CGPointMake(self.position.x, yMax)];
    CCActionMoveTo* thirdMove = [CCActionMoveTo actionWithDuration:[duration floatValue] position:CGPointMake(self.position.x, yMin)];

    [self runAction: [CCActionRepeatForever actionWithAction:
                      [CCActionSequence actionOne:secondMove two:thirdMove]]];
}