作为开发者，为啥我们要关心UI，前面的一堆通通可以忽略掉，直接跳到最后一条。因为好的UI设计可以帮助我们卖出更多拷贝，赚到更多钱。-As a developer, is what we should be concerned about the UI, in front of a bunch of all can be ignored, jump straight to the last one. Because of good UI design can help us sell more c