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Some common behavior methods will be defined in the state class, and Context will eventually delegate the request to these methods of the state object. In this example, this method is buttonWasPressed. No matter how many state classes are added, they must implement the buttonWasPressed method十年前的海平市，户籍警叶向荣的相亲被突然闯来的七岁流浪儿搅乱，这孩子却给他留下深刻印象。小男孩儿被夏奶奶带回家。奶奶有个同样失去父母的孙女儿叫夏如画。小男孩儿从此住下取名为魏如风。当叶向荣再次与如风相遇已是十年后，如风和如画已是步入豆蔻年华的俊男靓女。他们的奶奶去世，二人相依为命，彼此也暗生情愫。如风打工供如画在服装学校读书。一场意外打破他们平静的生活。如画被边缘少年阿福强暴，愤怒的如风在其工作地点报仇，因此结识了老板程豪。他的生活从此发生巨大的变化，挣扎于物质诱惑和感情的旋涡中。与此同时，叶向荣不顾如风的误解与阻碍坚持为其寻找亲人，在如画的帮助下终于解开如风出身之谜。如风在关键时刻做出正确抉择捍卫了正义。花开半夏时，如风考入警校，并与如画携手发誓永不分离。梁知府跟着解释道：就是什么有利可图，卖什么的铺子。16岁的艾莲娜公主不敌邪恶女巫，被封印在母亲送给她的护身符中。41年后她终于重获自由，击败了女巫，救出了祖父母和妹妹伊莎贝尔，并夺回了阿瓦洛王国。在大议会与各种魔法生物的帮助下，艾莲娜开始了新的冒险之旅。这部迪士尼频道动画剧集的故事背景与《小公主苏菲亚》(Sofia the First)在同一世界中，而艾莲娜公主则是迪士尼首位拉丁裔公主形象。墨鲫急了，喊道：不能送回去。Franklin picked out his favorite articles, read them over and over again, and analyzed how to unfold and explain the central idea. After the meeting, he probably thought about it.The observer mode defines a one-to-many dependency relationship, allowing multiple observer objects to monitor a certain topic object at the same time. When the state of this topic object changes, all observer objects will be notified so that they can automatically update their behaviors. The specific structure diagram is as follows: