- 当前 Bug 的表现（可附上截图）

    初始化，直接让video全屏， 真机调试，安卓上没问题，iPhone8上 闪退，其他IOS设备还没试。

- 预期表现

- 复现路径

- 提供一个最简复现 Demo

//*********  wxml

<video

    id='videoPlayer'

    title=''

    custom-cache='{{false}}'

    src='{{videoInfo.videoUrl}}'

    controls

    bindtimeupdate='videoTimeupdate'

    binderror='loadError'

    initial-time='{{seconds}}'

    bindwaiting='loadWaiting'

    bindended='videoTimeEnd'

    bindfullscreenchange='screenchange'

    enable-play-gesture='{{true}}'

    >

</video>

//*********  js

onLoad: function (options) {    

    this.videoCtx = wx.createVideoContext('videoPlayer')

    this.videoCtx.requestFullScreen()

}