Iterator patterns are created for collection objects, For collection objects, It must involve the addition and deletion of collection elements, and certainly supports the operation of traversing collection elements. If the traversal operation is also placed in the collection object at this time, the collection object will bear too many responsibilities. At this time, the responsibilities can be separated and the traversal of the collection can be placed in another object, which is the iterator object.
七个小矮人的木屋闯来一位迷路的小女孩汉娜，她坚信失踪的爸爸还活着，所以仅凭一支神鸟羽毛线索四处寻找爸爸。白雪公主和小矮人被她感动决定要帮助她，于是她们驾驶热气球飞向鸟岛，途中遭遇巨鹰和风暴袭击，险象环生。掉下森林后又经历了魔法屋的重重考验，她们历经千辛万苦见到神鸟，知道了爸爸失踪原因跟王后最近得到的一件世界上最美丽的礼服有关。随后救人路上她们落入王后的圈套全部被抓，危机关头，王子赶来同白雪公主和小矮人一起帮助解救爸爸，最后父女团圆。
该剧通过两位由于强烈的母性引起冲突的女人，展现了两位强大母亲之间的友情。
