使用uni-app开发，video组件的视频封面poster在模拟器显示成功，真机无效？
<video
id="myVideo2"
src="http://wxsnsdy.tc.qq.com/105/20210/snsdyvideodownload?filekey=30280201010421301f0201690402534804102ca905ce620b1241b726bc41dcff44e00204012882540400&bizid=1023&hy=SH&fileparam=302c020101042530230204136ffd93020457e3c4ff02024ef202031e8d7f02030f42400204045a320a0201000400"
binderror="videoErrorCallback"
:show-center-play-btn='false'
:show-play-btn="true"
:poster="items.poster"
controls
></video>
data(
items: {
src: 'http://wxsnsdy.tc.qq.com/105/20210/snsdyvideodownload?filekey=30280201010421301f0201690402534804102ca905ce620b1241b726bc41dcff44e00204012882540400&bizid=1023&hy=SH&fileparam=302c020101042530230204136ffd93020457e3c4ff02024ef202031e8d7f02030f42400204045a320a0201000400',
poster: 'http://static.roncoos.com/os/000.jpg'
},
)