其實原理很簡單，應該還有其他的方法

1 放大動畫 2 放大動畫還原動畫 3將兩個動畫放入動畫佇列 4重複動畫佇列 5 精靈執行動畫

CCScaleBy *actionScale1 = [CCScaleBy actionWithDuration:0.5f scale:1.2f];
  CCAction *actionscale2=[actionScale1 reverse];
  CCSequence *actionSequence = [CCSequence actions:actionScale1,actionscale2, nil];
  CCRepeatForever *repeat = [CCRepeatForever actionWithAction:actionSequence];
  [self runAction:repeat];