this.data.src = “wxfile://tmp_20f3b439b28c3bxxxxxxxxxxxxxxxxxxxx.jpg”; // 在代码中该地址是正常的微信临时文件路径

let base = wx.getFileSystemManager().readFileSync(this.data.src, ‘base64’);

console.log(base)

这一段代码，在安卓上没任何问题，可以转成base64，但在ios上就报错，提示超时了，如下：

[publib]:1 thirdScriptError

readFileSync:fail timeout;at pages/auth/auth page getBaseImg function

Error: readFileSync:fail timeout

    at readFileSync ([publib]:1:432687)

    at Object.e.(anonymous function) [as readFileSync] ([publib]:1:438711)

    at s.getBaseImg (weapp:///pages/auth/auth.js:62:42)

    at s.<anonymous> ([publib]:1:966027)

    at Function.success (weapp:///pages/auth/auth.js:29:14)

    at Object.success ([publib]:1:101885)

    at v ([publib]:1:212131)

    at v ([publib]:1:212317)

    at [publib]:1:213673

    at Object.y ([publib]:1:1375)

到底啥情况？