質問編集履歴
2
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@@ -4,7 +4,7 @@
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FutureBuilderのFutureメソッド内でprintを利用して取得した値の確認をしています。
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printが何度か実行されてしまうのですが、適切な動作なのでしょうか？
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**ホットリロード時**にprintが何度か実行されてしまうのですが、適切な動作なのでしょうか？
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追記
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@@ -97,3 +97,159 @@
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一度、stopしてからdebugを開始して動作確認を行った。
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### 追記
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109
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```Dart
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class PostsScreen extends StatefulWidget {
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@override
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115
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_PostsScreenState createState() => _PostsScreenState();
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}
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class _PostsScreenState extends State<PostsScreen> {
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122
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final user = FirebaseAuth.instance.currentUser;
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124
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String _userName;
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String _companyName;
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String _departmentName;
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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// elevation: 0.0,
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title: Text('Posts Screen'),
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actions: [
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// ログアウト⽤ボタン
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IconButton(
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onPressed: () => _onSignOut(context),
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icon: Icon(Icons.exit_to_app),
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),
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],
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),
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body: Center(
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child: FutureBuilder(
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future: _getFutureValue(),
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builder: (context, snapshot) {
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// 通信中はスピナーを表示
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if (snapshot.connectionState != ConnectionState.done) {
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return CircularProgressIndicator();
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}
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// エラー発生時はエラーメッセージを表示
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if (snapshot.hasError) {
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return Text(snapshot.error.toString());
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}
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if (snapshot.hasData) {
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193
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print(snapshot.data.documents[3]['userName']);
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print(snapshot.data.documents[3]['content']);
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return Center(
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child: Column(
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children: <Widget>[
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Text(_userName ?? ''),
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Text(_companyName ?? ''),
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Text(_departmentName ?? ''),
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Container(
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width: double.infinity,
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child: FlatButton(
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217
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// 新規登録ボタンをタップしたときの処理
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218
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219
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onPressed: () => startClaps(context),
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color: Colors.black,
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222
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textColor: Colors.white,
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224
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child: Text('つぎ'),
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),
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228
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229
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),
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230
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231
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],
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232
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233
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),
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234
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235
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);
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236
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237
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return Text(snapshot.data);
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238
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+
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239
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} else {
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240
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+
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241
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return Text("データが存在しません");
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242
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+
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243
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}
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244
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+
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245
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+
},
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246
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+
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247
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+
),
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248
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+
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249
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+
),
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250
|
+
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|
251
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+
);
|
|
252
|
+
|
|
253
|
+
}
|
|
254
|
+
|
|
255
|
+
```
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