buildRow method
构建搜索图标与显示文本
Implementation
Row buildRow() {
return Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
///左侧的搜索图标
Icon(
Icons.search,
color: Colors.black45,
size: 24.0,
semanticLabel: 'Text to announce in accessibility modes',
),
SizedBox(
width: 8.0,
),
///中间的输入框
Expanded(
flex: 1,
child: Container(
alignment: Alignment(-1, 0),
child: buildTextField(),
),
),
///右侧的清除小按钮
buildClearButton(),
],
);
}