flutter - 我如何从 TextEditingController 中获取 int 数据

Question

我想在 Flutter 中获取在 TextField() 中输入的 int 数据，我使用 TextEditingController:

TextEditingController _section_id = new TextEditingController();

并在其中使用这个 Controller :

TextField(controller: _section_id,
                keyboardType: TextInputType.number,)

但是现在，我怎样才能得到 int 数据呢？我尝试这种方式

Repository().placeAddApiProvider(_section_id.text)

但它只是字符串，并尝试转换为 int，

Repository().placeAddApiProvider(_section_id.text as int)

 but it is not work show me this error:
Unhandled Exception: type 'String' is not a subtype of type 'int' in type cast
E/flutter ( 6950): #0      AddPlaceState.build.<anonymous closure> (package:mosul/src/ui/users/add_place.dart:93:50)
E/flutter ( 6950): <asynchronous suspension>
E/flutter ( 6950): #1      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:513:14)
E/flutter ( 6950): #2      _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:568:30)
E/flutter ( 6950): #3      GestureRecognizer.invokeCallback (package:flutter/src/gestu...

谢谢

Answer 1

当我们想从 TextEditingController 中获取一个整数时，这样做，

 int var =int.parse(_section_id.text);