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  • 前端解放生产力之–动画(Adobe Effects + bodymovin + lottie)

    大概很久很久以前,2017年,参加了第二届中国前端开发者大会(FDCon2017),除了看了一眼尤雨溪,印象最深刻的就是手淘渚薰分享的关于H5交互的内容了。时光荏苒,最近再次接触,简单回顾一下。

    示例项目地址: https://github.com/skillnull/lottie-web-caption-animation

    首先是安装AE,具体怎么安装就不赘述了,随便一搜就有很多教程。

    安装完AE以后,装一个AE的插件bodymovin, github地址为: https://github.com/airbnb/lottie-web   在 'lottie-web/build/extension/'目录下面有一个bodymovin.zxp的文件,

    这就是我们要的插件了。

    安装插件,可以使用官方推荐的几种方法:https://github.com/airbnb/lottie-web#option-1-recommended

    本文尝试了两种方法:1. 使用 ZXP installer安装,试了很多次,都已失败告终。2. 将bodymovin.zxp文件后缀改成.zip然后解压,放到ae的安装目录下'AdobeCEPextensions'成功:

    WINDOWS:
    C:Program Files (x86)Common FilesAdobeCEPextensions or
    C:<username>AppDataRoamingAdobeCEPextensions
    MAC:
    /Library/Application Support/Adobe/CEP/extensions/bodymovin
    (you can open the terminal and type:
    $ cp -R YOURUNZIPEDFOLDERPATH/extension /Library/Application Support/Adobe/CEP/extensions/bodymovin
    then type:
    $ ls /Library/Application Support/Adobe/CEP/extensions/bodymovin
    to make sure it was copied correctly type)
    
    Edit the registry key:
    WINDOWS:
    open the registry key HKEY_CURRENT_USER/Software/Adobe/CSXS.6 and add a key named PlayerDebugMode, of type String, and value 1.
    MAC:
    open the file ~/Library/Preferences/com.adobe.CSXS.6.plist and add a row with key PlayerDebugMode, of type String, and value 1.

    接着就是打开AE,新建一个动画或者导入一个AE模板,然后在 ‘编辑 > 首选项 > 常规’ 中将允许脚本写入和访问网络勾上

    然后在‘窗口 > 扩展 > Bodymovin’将Bodymovin选中,会弹出一个插件框

    将上图中1的位置选中,在2的位置选择一个位置确定,然后render,导出data.json和其他文件,这时候可以点击preview进行预览,只需要选择刚才导出的data.json文件即可。

    下面就是和lottie进行结合使用了:

    首先下载lottie.js文件,在项目:https://github.com/airbnb/lottie-web下的'lottie-web/build/player/'目录下有个lottie.js文件,就是我们要的。然后将lottie放到根目录下,新建一个index.html文件,同时将导出的data.json和images文件夹放到根目录

    index.html的内容为:

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Bodymovin Demo</title>
        <script src="lottie.js"></script>
    </head>
    <body>
        <div id="animation"></div>
        <script>
            lottie.loadAnimation({
                path:'data.json',   //json文件路径
                loop:true,
                autoplay:true,
                renderer:'canvas',  //渲染方式,有"html"、"canvas"和"svg"三种
                container:document.getElementById('animation')
            });
        </script>
    </body>
    </html>

    这时候如果直接双击index.html进行预览是不行的,因为使用的是file:///形式打开的,ajax会报跨域的错误:

    lottie.js:4340 Access to XMLHttpRequest at 'file:///C:/nginx-1.15.8/html/data.json' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https.

    你可以本地安装一个nginx启动一个代理,然后配置端口为2323,server_name 为localhost:

    #user  nobody;
    worker_processes  1;
    
    #error_log  logs/error.log;
    #error_log  logs/error.log  notice;
    #error_log  logs/error.log  info;
    
    #pid        logs/nginx.pid;
    
    
    events {
        worker_connections  1024;
    }
    
    
    http {
        include       mime.types;
        default_type  application/octet-stream;
    
        #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
        #                  '$status $body_bytes_sent "$http_referer" '
        #                  '"$http_user_agent" "$http_x_forwarded_for"';
    
        #access_log  logs/access.log  main;
    
        sendfile        on;
        #tcp_nopush     on;
    
        #keepalive_timeout  0;
        keepalive_timeout  65;
    
        #gzip  on;
    
        server {
            listen       2323;
            server_name  localhost;
    
            #charset koi8-r;
    
            #access_log  logs/host.access.log  main;
    
            location / {
                root   html;
                index  index.html index.htm;
            }
    
            #error_page  404              /404.html;
    
            # redirect server error pages to the static page /50x.html
            #
            error_page   500 502 503 504  /50x.html;
            location = /50x.html {
                root   html;
            }
    
            # proxy the PHP scripts to Apache listening on 127.0.0.1:80
            #
            #location ~ .php$ {
            #    proxy_pass   http://127.0.0.1;
            #}
    
            # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
            #
            #location ~ .php$ {
            #    root           html;
            #    fastcgi_pass   127.0.0.1:9000;
            #    fastcgi_index  index.php;
            #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
            #    include        fastcgi_params;
            #}
    
            # deny access to .htaccess files, if Apache's document root
            # concurs with nginx's one
            #
            #location ~ /.ht {
            #    deny  all;
            #}
        }
    
    
        # another virtual host using mix of IP-, name-, and port-based configuration
        #
        #server {
        #    listen       8000;
        #    listen       somename:8080;
        #    server_name  somename  alias  another.alias;
    
        #    location / {
        #        root   html;
        #        index  index.html index.htm;
        #    }
        #}
    
    
        # HTTPS server
        #
        #server {
        #    listen       443 ssl;
        #    server_name  localhost;
    
        #    ssl_certificate      cert.pem;
        #    ssl_certificate_key  cert.key;
    
        #    ssl_session_cache    shared:SSL:1m;
        #    ssl_session_timeout  5m;
    
        #    ssl_ciphers  HIGH:!aNULL:!MD5;
        #    ssl_prefer_server_ciphers  on;
    
        #    location / {
        #        root   html;
        #        index  index.html index.htm;
        #    }
        #}
    
    }

    到命令行下去运行nginx.exe启动nginx然后访问localhost:2323就能预览了。至于nginx的使用命令就不罗列了。

    lottie的具体使用文档见: https://github.com/airbnb/lottie-web

    另:如果渲染的时候提示无法获取字体轮廓,将你的AE换成英文就好了。下面是一种将语言设置成英文的方法,以windows环境为例:

    首先找到安装路径下的配置文件painter.ini,一般默认安装的话在这个路径下:C:Program FilesAdobeAdobe After Effects CC 2018Support Filespainter.ini

    然后修改这个文件,在@AdobeID下面加上下面两行:

    ForceLanguage=1
    Language=en_US

    修改后的painter.ini内容为:

    [Config]
    ; Use INI or use default options
    UseCfg=1
    Name=Adobe After Effects CC 2017
    LEID=V7{}AfterEffects-140-Win-GM
    Version=14.0.0
    Serial=102310015133850186390073
    ; AdobeID (stub)
    AdobeID=painter@adobe.com
    PersonGUID=7189F1490B80A4FEC6B81B51@AdobeID
    ForceLanguage=1
    Language=en_US
    [AMT]
    ; AMT Library version
    Version=10
    ; Enables the genuine AMTRetrieveLibraryPath algorithm
    ; 0 = disable
    ; 1 = enable
    AMTRetrieveLibraryPath=0

    修改完后重新启动AE即可。如果没有权限修改,在painter.ini 文件上右击选择属性,在安全里更改权限即可。

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  • 原文地址:https://www.cnblogs.com/Man-Dream-Necessary/p/10238084.html
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