Created by: lijinhan

\examples\videoDemo项目运行后报错： 报错信息为： Uncaught (in promise) TypeError: Cannot read property '0' of undefined at Runner._callee5$ (runner.es6:144) at tryCatch (runtime.js:65) at Generator.invoke [as _invoke] (runtime.js:303) at Generator.prototype. [as next] (runtime.js:117) at asyncGeneratorStep (runner.es6:17) at _next (runner.es6:17) 项目中的模型是加载成功的，this.modelConfig.fetchShape为空。未定位到问题位置。还请帮忙查看下。