真机调试。使用FSM.readFileSync读微信好友里的pdf文件出错。

Unhandled promise rejection Error: readFileSync:fail timeout

    at l (eval at n.call.document (runtime.js?devtools_ignore=true:1), <anonymous>:2:1964570)

    at Object.A.<computed> (eval at n.call.document (runtime.js?devtools_ignore=true:1), <anonymous>:2:1855963)

    at Object.l.<computed> [as readFileSync] (eval at n.call.document (runtime.js?devtools_ignore=true:1), <anonymous>:2:1939342)

我用的是iphone 6s plus。求解决办法。文件就2M而已。