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如项目展示，一个简单的画图界面 客户端使用flutter完成，目前仅做了Android客户端，flutterWeb实在是问题太多，随便加个依赖就各种报错，展示先不做吧，毕竟心很痛。
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服务器是使用golang搭建，一个很简单的WebSocket后台 地址在这里
希望您能对我的答案满意～～
首先告诉您我引用的书刊的封面，请点击下面的链接：
英文原文：
"Notes Synthetiques", by Paul Gauguin
From the manuscript, c. 1888
Excerpted from "Theories of Modern Art", by Herschel B. Chipp
"Painting is the most beautiful of all arts. In it, all sensations are condensed; contemplating it, everyone can create a story at the will of his imagination and-with a single glance-have his soul invaded by the most profound recollections; no effort of memory, everything is summed up in one instant. -A complete art which sums up all the others and completes them. -Like music, it acts on the soul through the intermediary of the senses: harmonious colors correspond to the harmonies of sounds. But in painting a unity is obtained which is not possible in music, where the accords follow one another, so that the judgment experiences a continuous fatigue if it wants to reunite the end with the beginning. The ear is actually a sense inferior to the eye. The hearing can only grasp a single sound at a time, whereas the sight takes in everything and simultaneously simplifies it at will.
"Like literature, the art of painting tells whatever it wishes, with the advantage that the reader immediately knows the prelude, the setting, and the ending. Literature and music require an effort of memory for the appreciation of the whole; the last named is the most incomplete and the least powerful of arts.
"You can dream freely when you listen to music as well as when looking at a painting. When you read a book, you are a slave of the author's thought. The author is obliged to address himself to the mind before he can impress the heart, and God knows how little power a reasoned sensation has. Sight alone produced an instantaneous impulse. But then, the men of letters alone are art-critics; they alone defend themselves before the public. Their introductions are always a justification of their work, as if really good work does not defend itself on its own.
"These gentlemen flutter about the world like bats which flap their wings in the twilight and whose dark mass appears to you in every direction; animals disquieted by their fate, their too heavy bodies preventing them from rising. Throw them a handkerchief full of sand and they will stupidly make a rush at it.
"One must listen to them judging all human works. God has created man after his own image which, obviously, is flattering for man. "This work pleases me and is done exactly the way I should have conceived it." All art criticism is like that: to agree with the public, to seek a work after one's own image. Yes, gentlemen of letters, you are incapable of criticizing a work of art, be it even a book. Because you are already corrupt judges; you have beforehand a ready-made idea-that of the man of letters-and have too high an opinion of your own thoughts to examine those of others. You do not like blue, therefore you condemn all blue paintings. If you are a sensitive and melancholy poet, you want all compositions to be in a minor key. -Such a one likes graciousness and must have everything that way. Another one likes gaiety and does not understand a sonata.
"it takes intelligence and knowledge in order to judge a book. To judge painting and music requires special sensations of nature besides intelligence and artistic science; in a word, one has to be a born artist, and few are chosen among all those who are called. Any idea can be formulated, but not so the sensation of the heart. What efforts are not needed to master fear or a moment of enthusiasm! Is not love often instantaneous and nearly always blind? And to say that thought is called spirit, whereas the instincts, the nerves, and the heart are part of matter. What irony!
"The vaguest, the most undefinable, the most varied is precisely matter. Thought is a slave of sensations. I have always wondered why one speaks of "noble instincts." . . .
"Above man is nature.
"Literature is human thought described by words.
"Whatever talent you may have in telling me how Othello appears, his heart devoured by jealousy, to kill Desdemona, my soul will never be as much impressed as when I have seen Othello with my own eyes entering the room, his forehead presaging the storm. That is why you need the stage to complement your work.
"You may describe a tempest with talent-you will never succeed in conveying to me the sensation of it.
"Instrumental music as well as numbers are based on a unit. The entire musical system derives from this principle, and the ear has become used to all these divisions. The unit is established through the means of an instrument, yet you may choose some other basis and the tones, half-tones, and quarter-tones will follow each other. Outside of these you will have dissonance. The eye is used less than the ear to perceive these dissonances, but then divisions [of color] are more numerous, and for further complication there are several units.
"On an instrument, you start from one tone. In painting you start from several. Thus, you begin with black and divide up to white-the first unit, the easiest and the most frequently used one, hence the best understood. But take as many units as there are colors in the rainbow, add those made up by composite colors, and you will reach a rather respectable number of units. What an accumulation of numbers, truly a Chinese puzzle! No wonder then that the colorist's science has been so little investigated by the painters and is so little understood by the public. Yet what richness of means to attain an intimate relationship with nature!
"They reprove our colors which we put [unmixed] side by side. In this domain we are perforce victorious, since we are powerfully helped by nature which does not proceed otherwise. A green next to a red does not produce a reddish brown, like the mixture [of pigments], but two vibrating tones. If you put chrome yellow next to this red, you have three tones complementing each other and augmenting the intensity of the first tone: the green. Replace the yellow by a blue, you will find three different tones, though still vibrating through one another. If instead of the blue you apply a violet, the result will be a single tone, but a composite one, belonging to the reds.
"The combinations are unlimited. The mixture of colors produces a dirty tone. Any color alone is a crudity and does not exist in nature. Colors exist only in an apparent rainbow, but how well rich nature took care to show them to you side by side in an established and unalterable order, as if each color was born out of another!
"Yet you have fewer means than nature, and you condemn yourself to renounce all those which it puts at your disposal. Will you ever have as much light as nature, as much heat as the sun? And you speak of exaggeration-but how can you exaggerate since you remain below nature?
"Ah! If you mean by exaggerated any badly balanced work, then you are right in that respect. But I must draw your attention to the fact that, although your work may be timid and pale, it will be considered exaggerated if there is a mistake of harmony in it. Is there then a science of harmony ? Yes.
"In that respect the feeling of the colorist is exactly the natural harmony. Like singers, painters sometimes are out of tune, their eye has no harmony. Later there will be, through study, an entire method of harmony, unless people neglect it, as is done in the academies and most of the time also in studios. Indeed, the study of painting has been divided into two categories. One learns to draw first and then to paint, which means that one applies color within a pre-established contour, not unlike a statue that is painted after it is finished. I must admit that until now I have understood only one thing about this practice, namely that color is nothing but an accessory. I 'Sir, you must draw properly before painting"-this is said in a pedantic manner; but then, all great stupidities are said that way.
"Does one wear shoes instead of gloves? Can you really make me believe that drawing does not derive from color, and vice-versa? To prove this, I commit myself to reduce or enlarge one and the same drawing, according to the color with which I fill it up. Try to draw a head by Rembrandt in his exact proportions and then put on the colors of Rubens-you will see what misshapen product you derive, while at the same time the colors will have become unharmonious.
"During the last hundred years large amounts have been spent for the propagation of drawing and the number of painters is increasing, yet no real progress has been made. Who are the painters we admire at the present? All those who reproved the schools, all those who drew their science from the personal observation of nature. Not one ..."
[manuscript not completed].
我能容忍自己每个字都是错的，但是却不能容忍其中任何一个字不是真诚的。
祝好运～～
想要进入互联网行业，首先得搞清楚互联网行业中有哪些岗位，这些岗位是做什么的，再去关注选择一个岗位、一个方向。
一、互联网中的岗位。
一般，公司越大岗位越完善，我们选择阿里巴巴的招聘页，去看看大型互联网公司都有哪些岗位。
图片来源：阿里官网 招聘页
从图片可以得出，除开一个公司的基础职能岗位（行政、财务、法务等），互联网岗位大的方向可以分为技术、设计、产品、运营。
1、技术：
技术岗中包含前端、开发、运维、质量保证、数据、算法、地图（GIS）等。
2、设计：
设计岗有交互设计、视觉设计、用户体验与研究。
3、产品：
产品针对不同业务方向，对产品也会有所区分。
4、运营：
运营也和产品一样，公司的业务不同，运营的方向、内容、方式也会不同。
知道了这些岗位，那这些岗位在具体的工作是什么呢？一个项目的从无到有，前期的工作就不细述了，项目正式开始大概的流程：
（1）项目负责人：制定项目计划。
（2）需求/产品：据用户诉求，分析产品规划，输出需求文档。或者是用户分析，产品定位，输出产品需求。
（3）需求/产品：依据初步的原型图和需求文档，对开发、测试澄清需求。或者是产品依据需求输出线框图。
（4）设计：根据需求，交互设计师设计原型图，输出交互稿；UI设计师输出UI稿。交互和UI评审。
（5）开发：依据迭代要求和开发计划，开发对应功能模块。
（6）测试：输出测试方案，依据测试计划和开发给出的转测范围，测试对应功能。
（7）运维：迭代开发完成后，项目交付，进入运维期。
依据以上流程，需求（产品岗）需要参与项目前期产品定位、需求整理的工作，同时在整个项目周期需要依据项目计划，给项目组人员澄清需求。依据测试反馈、用户反馈、活动周期去调整产品需求，需求（产品岗）孕育产品。
在阿里的招聘页中，设计岗包含交互设计、视觉设计以及用户体验与研究。设计依据产品提出的需求去做产品的交互设计、视觉设计，让产品生动形象。
开发人员依据需求和设计，赋予产品真正的生命，让产品活起来。测试是保证产品质量，让产品更完美。一个成熟的产品上线后，运维人员去维护产品的正常使用，运营人员提高产品的曝光，吸引大家使用该产品。
二、简单介绍了互联网中的岗位，那什么岗位适合零基础的人呢？
由于市场需求量大，薪资待遇高，所以越来越多的人想要加入互联网行业，针对零基础想要转行的小伙伴到底选择哪个方向去学习才能快速入行呢？
这个答案肯定不统一，因为每个人的兴趣、性格、行业背景不同，选择、适合的方向也不同。我们去聊聊每个方向需要的能力与发展，再结合你自己的情况选择一个方向深入发展。
1、技术：
技术岗一般分为开发、测试、运维，开发针对不同的语言，有不同的方向，如java、C++、Python等。不同的职责分为前端开发、后台、手机应用等，不同的业务方向分为区块链、人工智能、C端、B端、移动端等。
测试又依据不同的测试方向，分为功能测试、性能测试、安全测试、自动化测试等。
针对这些方向，如果你是零基础而且对编码很感兴趣，可以尝试前端开发、java开发、测试，原因有以下几点：
1、前端开发零基础好入门，上手快可以立马看到学习效果，可以大大提高学习兴趣。但是并不是说前端没有技术含量，我们不仅需要学习前端基础，还需要学习vue.js、react.js、react-native和Flutter等主流框架，并扩展three.js、typescript等等技术，深挖、剖析框架原理。甚至了解后端的知识，在工作中才能减少沟通成本。
2、Java作为一门面向对象编程语言，是全球主流的编程语言之一。Java技术具有卓越的通用性、简单性、安全性、高效性、健壮性、多线程、动态性、平台独立与移植性等特点，可以用于编写Web 应用程序、桌面应用程序、分布式系统和嵌入式系统应用程序等。相关调查显示，在各种编程语言中，Java使用者比例很高，达40%以上！
3、为了保证软件在出厂时的"健康状态"，几乎所有的IT企业在软件产品发布前都需要大量的质量控制工作。你可能会说，为什么要对编码感兴趣才建议去学测试，测试不就是点点点吗？你错了，点点点的工作已经不能满足企业对测试的需求了，现在市场上更倾向于有开发能力的测试。比如在测试工作中，我们可能会需要写测试脚本、测试工具，所以这些都需要测试工程师具备一定的编码能力。所以如果对测试感兴趣一定也要学习编码，具备一定的编码能力哦。
2、设计：
互联网中的设计分为视觉设计和交互设计，视觉设计又会依据公司业务、项目分为Web网页设计、电商设计、移动端设计、运营插画设计等。
交互设计是努力去创造和建立的是人与产品及服务之间有意义的关系，而视觉设计主要是让产品富有灵魂，生动有美感。由于大多数不了解互联网的人，大概听得最多的岗位是开发和测试，那我们就一起来了解一下UI设计。
UI（User Interface），中文名“用户界面”。Ps：（百度解释）UI是指对软件的人机交互、操作逻辑、界面美观的整体设计。
通俗来说，大家生活中的手机和电脑上使用的各种App、网页软件等产品的原型设计都来自于UI。
如果你觉得开发编码太累，测试太枯燥，可以尝试了解一下UI设计。也许你会问没有绘画基础也可以学习UI设计吗？
答案是肯定是可以的，市面上大多数的UI设计并非科班专业出生，通过不断的学习和积累，也可以具备UI设计的相关专业技能。
那UI设计的前景是否和技术岗一样好呢？
我们将UI设计、前端开发、软件测试这三个岗位来做对比，可以看出UI设计也是跟着技术岗的市场需求在有浮动的变化。最近几个月，UI设计的市场需求还高于技术岗，所以说UI市场并未饱和，还有很大的市场需求。
图片来源：职友集
说明：曲线越向上代表市场需求量越大，就业情况越好。反之，代表该类职位需求量较少。该数据由各地招聘网站统计而来，可能因抓取系统稳定性等因素而致使数据偏离客观实情，仅供参考。
从市场招聘条件可以得出UI设计的薪资待遇在5000以上的占多数，全国UI设计的平均薪资是在一万左右，UI设计对于学历也没有超级高的要求，所以普通学历通过UI设计进入大厂的几率更高。
图片来源：职友集
图片来源：职友集
近几年UI工资也是在稳步上升，入行UI设计，随着工作经验的积累，设计能力的提升，对应的薪资待遇也会增长。再者，当经验丰富后还可以利用工作之余兼职，这也是一笔不错的收入。
图片来源：职友集
阿里巴巴资深总监杨光曾表示：无论是鲁班，还是未来升级的人工智能都不可能取代设计师，机器人只是帮助设计师解决重复性的工作，重塑整个设计生态，而真正的“设计师”，反而会越来越值钱。
综上所述，想要不被社会淘汰，最好让人无法取代。入行互联网，选择UI设计让你既有技术又有发展。如果对UI设计感兴趣，选择UI让兴趣和梦想齐飞。
3、产品：
当然也有很多小伙伴对产品经理这个职位很感兴趣，难道是因为经理这个头衔听起来很拉风。那我们又来了解互联网行业中的产品经理。
人人都是产品经理，但是真的每个人都能做产品经理吗？产品经理会伴随一个产品走完全部的生命周期，他需要和开发、设计、测试、运营等团队，及上下游紧密合作，对项目进行风险把控和资源协调，推进达成产品目标。
虽然看似产品经理不需要技术，但是没有技术背景你如何和技术人员沟通，如何把控进度与风险，所以产品经理特别考验一个人的综合素质，就不建议零基础的小伙伴通过产品经理入行互联网了。你可以通过技术入行，再转到产品岗，有了技术背景，对你的产品经理的职业发展有很大帮助哦。
4、运营：
运营就是对运营过程的计划、组织、实施和控制，是与产品生产和服务创造密切相关的各项管理工作的总称。而互联网运营就是要利用一切资源与策略去吸引用户，增加用户粘性。
大多数的人会说，运营岗位门槛低，没有太多技术含量。对于运营来说，因为没有固定的概念和标准的工作定义，不同的产品、不同的平台所采取的方式方法不一样，所以运营工作灵活，方式多变，需要顺应变化。由于回答中有很多关于运营岗位的回答，在这里我就不再对运营岗位进行详细说明了。
其实互联网行业中的岗位很多，根据自己的兴趣和背景去选择合适的方向，但是零基础找到工作肯定不现实。因为企业不是学校，不会传授技术给零经验、零基础的人，所以你一定得具备胜任岗位的能力，才有可能入行互联网。零基础、零经验的小伙伴，大多数都会以初级人员的要求进入行业，所以想要入行，你至少得具备一定的技能和前提条件。