在 html 中常见的布局标签都有 padding 属性，但是 Flutter 中很多 Widget 是没有 padding 属 性。这个时候我们可以用 Padding 组件处理容器与子元素直接的间距。

常用属性

/*
 * padding 组件 , 间距 组件 
 */

class PaddinView extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: EdgeInsets.fromLTRB(0, 0, 10, 0),
      child: GridView.count(
        crossAxisCount: 2,
        childAspectRatio: 2.0,
        children: <Widget>[
          Padding(
            padding: EdgeInsets.fromLTRB(10, 10, 0, 0),
            child: Image.network('https://www.itying.com/images/flutter/1.png',
                fit: BoxFit.cover),
          ),
          Padding(
            padding: EdgeInsets.fromLTRB(10, 10, 0, 0),
            child: Image.network('https://www.itying.com/images/flutter/2.png',
                fit: BoxFit.cover),
          ),
          Padding(
            padding: EdgeInsets.fromLTRB(10, 10, 0, 0),
            child: Image.network('https://www.itying.com/images/flutter/3.png',
                fit: BoxFit.cover),
          ),
          Padding(
            padding: EdgeInsets.fromLTRB(10, 10, 0, 0),
            child: Image.network('https://www.itying.com/images/flutter/4.png',
                fit: BoxFit.cover),
          ),
          Padding(
            padding: EdgeInsets.fromLTRB(10, 10, 0, 0),
            child: Image.network('https://www.itying.com/images/flutter/5.png',
                fit: BoxFit.cover),
          ),
          Padding(
            padding: EdgeInsets.fromLTRB(10, 10, 0, 0),
            child: Image.network('https://www.itying.com/images/flutter/6.png',
                fit: BoxFit.cover),
          ),
        ],
      ),
    );
  }
}