flutter 使用showDialog制作的简洁的登录界面

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132

// 这个地方我们因该使用 stl 记得改回来
class HYHomeScreen extends StatefulWidget {
@override
_HYHomeScreenState createState() => _HYHomeScreenState();
}

class _HYHomeScreenState extends State<HYHomeScreen> {

@override
Widget build(BuildContext context) {
// 验证使用的Key
final _formKey = GlobalKey<FormState>();
final nameController = TextEditingController();
final passwordController = TextEditingController();

return Scaffold(
appBar: HYHomeAppBar(context),
body: HYHomeContent(),
floatingActionButton: FloatingActionButton(
child: Icon(Icons.add),
onPressed: () {
showDialog(
context: context,
builder: (BuildContext context) {
return AlertDialog(
content: Stack(
overflow: Overflow.visible,
children: <Widget>[
Positioned(
right: -40.px,
top: -40.px,
child: Container(
margin: EdgeInsets.only(left: 400.px),
child: InkResponse(
onTap: () {
Navigator.of(context).pop();
},
child: CircleAvatar(
child: Icon(Icons.close),
backgroundColor: Colors.red,
),
),
),
),
Container(
width: 200.px,
// color: Colors.red,
child: Form(
key: _formKey,
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Padding(
padding: EdgeInsets.all(8.px),
child: TextFormField(
decoration: InputDecoration(
labelText: "username",
icon: Padding(
padding: EdgeInsets.only(top: 15.px),
child: Icon(Icons.supervised_user_circle),
)
),
controller: nameController,
validator: (value) {
if( value.isEmpty ) {
return "请输入用户名";
}
return null;
},
),
),
Padding(
padding: EdgeInsets.all(8.px),
child: TextFormField(
decoration: InputDecoration(
labelText: "password",
icon: Padding(
padding: EdgeInsets.only(top: 15.px),
child: Icon(Icons.lock),
)
),
controller: passwordController,
validator: (value) {
if( value.isEmpty ) {
return "请输入密码";
}
return null;
},
),
),
Padding(
padding: EdgeInsets.only(top: 15.px),
child: RaisedButton(
child: Text("登录"),
onPressed: () {
if (_formKey.currentState.validate()) {
_formKey.currentState.save();
print("name : ${nameController.text}");
nameController.text = "";
print("password: ${passwordController.text}");
passwordController.text = "";
// const timeout = const Duration(seconds: 1);
// Timer.periodic(timeout, (timer){
//// print(timer);
// Navigator.of(context).pop();
// });
}
},
),
)
],
),
),
)
],
)
);
}
);
},
),
);
}

@override
void dispose() {
// TODO: implement dispose
super.dispose();
}
}

在这里插入图片描述