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完成空安全转换

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toly
2021-08-29 11:29:45 +08:00
parent 8a5a57f5ac
commit 5806f35f54
319 changed files with 2638 additions and 2019 deletions
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2
lib/views/widgets/StatefulWidget/DropdownButton/node1_base.dart
View File

@@ -45,7 +45,7 @@ class _CustomDropDownButtonState extends State<CustomDropDownButton> {
color: _color,
),
items: _buildItems(),
onChanged: (v) => setState(() => _color = v)),
onChanged: (v) => setState(() => _color = v??Colors.blue)),
],
);
}

10
lib/views/widgets/StatefulWidget/DropdownButton/node2_style.dart
View File

@@ -21,8 +21,8 @@ class StyleDropDownButton extends StatefulWidget {
class _StyleDropDownButtonState extends State<StyleDropDownButton> {
Color _color = Colors.red ;
final _colors = [Colors.red, Colors.yellow, Colors.blue, Colors.green];
final _info = ["红色", "黄色", "蓝色", "绿色"];
final List<Color> _colors = [Colors.red, Colors.yellow, Colors.blue, Colors.green];
final List<String> _info = ["红色", "黄色", "蓝色", "绿色"];
@override
Widget build(BuildContext context) {
@@ -33,16 +33,16 @@ class _StyleDropDownButtonState extends State<StyleDropDownButton> {
margin: EdgeInsets.symmetric(horizontal: 20),
width: 50,
height: 50,
color: _color??Colors.transparent,
color: _color,
),
DropdownButton<Color>(
hint: Text('请选择'),
isDense: true,
iconSize:20,
iconEnabledColor:_color??Colors.orange,
iconEnabledColor:_color,
value: _color,
items: _buildItems(),
onChanged: (v) => setState(() => _color = v)),
onChanged: (v) => setState(() => _color = v??Colors.blue)),
],
);
}