setState 在 iOS 上的工作不等于 Android

Question

我正在使用共享偏好做一些收费信息，但在 iOS 中不工作，而在 Android 中按预期工作

@override
void initState() {
    super.initState();
    readData();
}

当 readData() 有数据时，我有 2 个文本字段用于填充它

final email = TextFormField(
      keyboardType: TextInputType.emailAddress,
      autofocus: false,
      initialValue: _email,
      validator: (input) {
        if(input.isEmpty) {
          return 'Introduce un Email';
        }
      },
      onSaved: (input) => _email = input,
      decoration: InputDecoration(
          hintText: 'Email',
          contentPadding: EdgeInsets.fromLTRB(20.0, 10.0, 20.0, 10.0),
          border:
          OutlineInputBorder(borderRadius: BorderRadius.circular(32.0))),
);

final password = TextFormField(
      autofocus: false,
      obscureText: true,
      initialValue: _password,
      validator: (input) {
        if(input.isEmpty) {
          return 'Introduce la contraseña';
        }
      },
      onSaved: (input) => _password = input,
      decoration: InputDecoration(
          hintText: 'Contraseña',
          contentPadding: EdgeInsets.fromLTRB(20.0, 10.0, 20.0, 10.0),
          border:
          OutlineInputBorder(borderRadius: BorderRadius.circular(32.0))),
);

readData() async {
    final prefs = await SharedPreferences.getInstance();

    setState(() {
      _email = prefs.getString('email');
      _password = prefs.getString('password');
    });
}

在 android 中效果很好但在 iOS

中效果不佳

Answer 1

我认为更新文本字段值的正确方法是使用 TextEditingController。您的代码如下所示：

在你所在的州

final TextEditingController emailCtrl = TextEditingController();
final TextEditingController passwordCtrl = TextEditingController();

readData() async {
    final prefs = await SharedPreferences.getInstance();
    emailCtrl.text = prefs.getString('email');
    password.text = prefs.getString('password');
}

您的 TextFields

final email = TextFormField(
     // ... your other arguments
    controller: emailCtrl
);
final password = TextFormField(
     // ... your other arguments
    controller: passwordCtrl
);

setState 在 iOS 上的工作不等于 Android

setState is not working iqual on iOS than Android

setstate

ios

flutter