解决pyspider框架web预览框过小问题
Chrome 使用pyspider框架时，web预览框只有一小条：
解决办法：
找到debug.min.css文件，替换为如下内容：
body{margin:0;padding:0;height:100%;overflow:hidden}.warning{color:#f0ad4e}.error{color:#d9534f}#control{z-index:9999;min-760px;100%;height:35px;position:fixed;left:0;right:0;background-color:#eee;box-shadow:0 1px 2px #999}#control div{line-height:35px;margin-left:10px;margin-right:10px}#control .webdav-btn{position:relative;float:right;padding:1px 7px 0;line-height:21px;border-radius:5px;border:1px solid #428bca;background:#fff;color:#428bca;cursor:pointer;margin:6px 0 0 10px}#control .webdav-btn:hover{background:#6aa3d5;color:#fff}#control .webdav-btn.active{background:#428bca;color:#fff}#editarea{100%;position:fixed;top:37px}#editarea,.debug-panel{left:0;right:0;bottom:0}.debug-panel{position:absolute;top:0}.resize{background-color:#555;cursor:ew-resize}.resize:hover+.debug-panel{border-left:1px dashed #555!important}.overlay{position:absolute;top:0;bottom:0;left:0;right:0;z-index:9999;background:rgba(0,0,0,.4)}.focus .CodeMirror-activeline-background{background:#e8f2ff!important}.CodeMirror-activeline-background{background:transparent!important}#task-panel{height:100%;overflow-x:auto}#run-task-btn{z-index:99;position:absolute;top:0;right:0;background:#5cb85c;border-radius:0 0 0 5px;color:#fff;margin:0;padding:3px 7px 5px 10px;cursor:pointer;font-weight:700;line-height:15px}#run-task-btn:hover{background:#449d44}#undo-redo-btn-group{z-index:99;position:absolute;top:0;right:0;background:#91cf91;border-radius:0 0 0 5px;color:#fff;margin:0;padding:3px 7px 5px 10px;cursor:pointer;font-weight:700;line-height:15px;top:auto;bottom:0;border-radius:5px 0 0 0;padding:5px 0 3px;overflow:hidden}#undo-redo-btn-group:hover{background:#6ec06e;background:#91cf91}#undo-redo-btn-group a{color:#fff;text-decoration:none;padding:5px 7px 3px 10px}#undo-redo-btn-group a:hover{background:#6ec06e}#save-task-btn{z-index:99;position:absolute;top:0;right:0;background:#428bca;border-radius:0 0 0 5px;color:#fff;margin:0;padding:3px 7px 5px 10px;cursor:pointer;font-weight:700;line-height:15px}#save-task-btn:hover{background:#3071a9}#task-editor{position:relative}#task-editor .CodeMirror{height:auto;padding-bottom:3px;background:#c7e6c7}#task-editor .CodeMirror-scroll{overflow-x:auto;overflow-y:hidden}#task-editor.focus .CodeMirror-activeline-background{background:#eaf6ea!important}#tab-control{list-style-type:none;position:absolute;bottom:0;right:0;margin:8px 20px;padding:0}#tab-control li{position:relative;float:right;padding:1px 7px 0;line-height:21px;margin-left:10px;border-radius:5px;border:1px solid #428bca;background:#fff;color:#428bca;cursor:pointer}#tab-control li:hover{background:#6aa3d5;color:#fff}#tab-control li.active{background:#428bca;color:#fff}#tab-control li span{position:absolute;top:-5px;right:-10px;background:#d9534f;color:#fff;font-size:80%;font-weight:700;padding:2px 5px 0;border-radius:10px}#debug-tabs{margin-bottom:45px}#tab-web.fixed{padding-top:24px}#tab-web iframe{border-0;100%;height:900px}#tab-html{margin:0;padding:7px 5px}#tab-html pre{margin:0;padding:0}#tab-follows .newtask{position:relative;height:30px;line-height:30px;background:#fceedb;border-bottom:1px solid #f0ad4e;border-top:1px solid #f0ad4e;margin-top:-1px;padding-left:5px;padding-right:70px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;cursor:pointer}#tab-follows .newtask:hover,#tab-follows .newtask:hover .task-more{background:#f8d9ac}#tab-follows .newtask .task-callback{color:#ec971f}#tab-follows .newtask .task-url{font-size:95%;text-decoration:underline;font-weight:lighter;color:#428bca}#tab-follows .newtask .task-more{position:absolute;right:33px;top:0;float:right;color:#f0ad4e;padding:0 10px;background:#fceedb;border-radius:10px}#tab-follows .newtask .task-run{position:absolute;right:0;top:0;font-size:80%;padding:0 10px 0 30px;float:right;border-bottom:1px solid #a3d7a3;border-top:1px solid #a3d7a3;background:#80c780;color:#fff;text-shadow:0 0 10px #fff;font-weight:700}#tab-follows .newtask .task-run:hover{background:#5cb85c}#tab-follows .task-show pre{margin:5px 5px 10px}#python-editor{position:absolute;top:0;100%;bottom:0}#python-editor .CodeMirror{height:100%;padding-bottom:20px}#python-log{100%;min-height:10px;max-height:40%;background:rgba(0,0,0,.6);overflow:auto}#python-log #python-log-show{z-index:89;auto;padding-top:5px;background:#d9534f;box-shadow:0 2px 20px #d9534f;cursor:pointer}#python-log pre{margin:0;padding:10px;color:#fff}#css-selector-helper{background-color:#eee;padding:0;100%;height:24px;text-align:right;white-space:nowrap}#css-selector-helper.fixed{position:absolute;top:0}#css-selector-helper button{line-height:16px;vertical-align:2px}span.element{position:relative;height:24px;display:inline-block;padding:0 .2em;cursor:pointer;color:#afafaf;z-index:99999}span.element.invalid{display:none}span.element.selected{color:#000}span.element:hover{background-color:#c8c8c8}span.element:hover>ul{display:block}span.element>ul{display:none;margin:0;padding:0;position:absolute;top:24px;left:0;background-color:#eee;border:1px solid #000;border-top-0;color:#afafaf}span.element>ul>li{display:block;text-align:left;white-space:nowrap;padding:0 4px}span.element>ul>li.selected{color:#000}span.element>ul>li:hover{background-color:#c8c8c8}.copy-selector-input{height:24px;padding:0;border:0;margin:0;padding-right:.2em;font-size:1em;text-align:right;100%;margin-left:-100px;background:#eee}
/*# sourceMappingURL=debug.min.css.map*/
在web ui中打开一个项目调试，点到WEB页面，按Ctrl+F5 刷新测试，网页预览框已恢复正常。
亲测可用：
