flutter之添加阴影

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Container(                   width: double.infinity,                   height: ScreenUtil.getInstance().setHeight(500),                   decoration: BoxDecoration(                       color: Colors.white,                       borderRadius: BorderRadius.circular(8.0),                       boxShadow: [                         BoxShadow(                             color: Colors.black12,                             offset: Offset(0.0, 15.0), //阴影xy轴偏移量                             blurRadius: 15.0, //阴影模糊程度                             spreadRadius: 1.0 //阴影扩散程度                             )                       ]),                 )