.mui-picker-inner {

[icecola0303]

          .mui-picker-inner {
position: relative;
width: 100%;
height: 100%;
/*-webkit-mask-box-image: -webkit-linear-gradient(bottom, transparent, transparent 5%, #fff 20%, #fff 80%, transparent 95%, transparent);*/
/*-webkit-mask-box-image: linear-gradient(top, transparent, transparent 5%, #fff 20%, #fff 80%, transparent 95%, transparent)*/

}

注释掉就可以了

Originally posted by @83628410 in https://github.com/dcloudio/mui/issues/525#issuecomment-1495641611