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Let's understand such a problem first, If our front-end development needs are the needs given to us by the demand side, It is possible that a front-end developer will deal with multiple demanders, Therefore, it will keep in touch with multiple demand parties. Then in the program it means keeping references to multiple objects, The larger the program, There will be more and more objects, The relationship between them will become more and more complicated. Now if there is an intermediary (if it is our supervisor) to meet the needs of multiple demanders, Then the demander only needs to give all the requirements to our supervisor, who will assign tasks to us according to our workload in turn. In this way, our front-end development does not need to contact with multiple business parties, we only need to contact our supervisor (i.e. Intermediary), which weakens the coupling between objects.How to answer such questions? Consistent Zhihu style, the following various statements have, but the top one is actor Zhang Yi's answer (of course, there are reasons why he is a celebrity), but his answer is as follows:When the switch is pressed, the program will call the self.buttonWasPressed method. All behaviors after the switch is pressed will be encapsulated in this method. The code is as follows:I'd like to share with you another tool, full title and full martial arts archive.小龙女是深宫中最受宠的格格，儿时一次偶遇，被一位世外高人收做徒弟，学了很多神奇的法术。一天，小龙女、三皇子还有师弟一起赏花，三皇子看着这眼前幸福的一幕暗中嘱咐师弟，如果他不在了要照顾好小龙女。三个月后三皇子被神龙教教主王聪儿杀害。朝野震动，皇帝因此下令捉拿神龙教主王聪儿。小龙女在殿外偷听了三哥死去的真相，开始了报仇计划。王聪儿为了寻找一柄宝剑，蒙面出现在福大将军的府邸中，传说得此剑者得天下。 小龙女等人无意中偷听到庄主与王聪儿早有勾结。小龙女和福东刚想回宫报信却被王聪儿发现了，三人打了起来，福东身受重伤，肌肉男适时相救，三人得以逃离。 小龙女等人逃到树林中暂作休养，小龙女和福东也渐生情愫，而王聪儿却得到了宝剑，原来是肌肉男为了救小龙女和福东所做的交换，肌肉男回来的时候得知皇帝失踪了，小龙女等人便到皇帝的落脚地寻找，可推开门一看发现皇帝并没有失踪，只是身边多了一名蝶妃，与皇帝交谈时发现皇帝言辞神色有异样，空中还弥漫着一种奇怪的香味，使得众人神志不清，小龙女等人也遭到迷惑和陷害。后来在肌肉男的帮助下小龙女顺利地逃了出来，也解开了皇帝等人的毒。王聪儿并没有收到蝶妃传来的讯号，便杀进皇宫。经过一番激烈的打斗，王聪儿摘下面具，暴露了自己是三皇子的身份，小龙女难以置信。小龙女在师傅的帮助下打败了王聪儿。经过了一系列的事情后，皇上决定赐婚小龙女和福东。在调查失踪的一个紧密的加利西亚小镇，一个国民警卫队官员发现了秘密有关她自己的损失。The whole production process of mud dyeing is natural, natural and natural. We may occasionally use chemical dyeing aids ourselves. Although the amount is very small, it still contains certain harmful chemicals. However, mud dyeing uses the iron element in the soil itself. However, the soil was taken from the ploughed fields, and finally the mud and water dyed with cloth returned to the ploughed fields without any natural damage and waste, thus truly achieving natural environmental protection.