使TextField在按鈕單擊后啟用無效顫振

我有簡單的文本欄位。在單擊特殊按鈕之前，用戶不允許在此文本欄位中寫入。這是我的代碼，此功能不起作用，但其中的所有其他內容都可以正常作業，我做錯了什么？

   TextEditingController _textFieldController = TextEditingController();
    bool isTextFieldEnable = false;
    FocusNode _focusNode = FocusNode();
  Row(
            children: [
              Container(
                width: 305,
                margin: EdgeInsets.only(left: 34),
                height: 250,
                child: SingleChildScrollView(
                    child: TextField(
                  controller: _textFieldController,
                  decoration: new InputDecoration.collapsed(hintText: "Описание"),
                  maxLines: null,
                  focusNode: _focusNode,
                  enabled: isTextFieldEnable,
                  onChanged: (value) {
                    CheckListModel.checkLists[arg['index']].description = value;
                  },
                  onSubmitted: (value) async {
                    FocusScope.of(context).unfocus();
                    _textFieldController.text = CheckListModel.checkLists[arg['index']].description;
                    CheckListModel checkList = CheckListModel.checkLists[arg['index']];
                    await checkList.writeToFile(checkList.toJson());
                  },
                  textInputAction: TextInputAction.done,
                )),
              ),
              Column(
                mainAxisAlignment: MainAxisAlignment.start,
                children: [
                  IconButton(
                    onPressed: () {
                      setState(() {
                        isTextFieldEnable = true;
                        print(isTextFieldEnable);
                      });
                    },
                    icon: Icon(Icons.edit),
                  ),
                ],
              )
            ],
          ),

uj5u.com熱心網友回復：

請參考以下代碼

我們可以通過將其 readOnly 屬性設定為 true 或 false 來控制是否禁用 TextField，

TextEditingController _textFieldController = TextEditingController();
    bool isTextFieldEnable = true;
    FocusNode _focusNode = FocusNode();
  Row(
            children: [
              Container(
                width: 305,
                margin: EdgeInsets.only(left: 34),
                height: 250,
                child: SingleChildScrollView(
                    child: TextField(
                  controller: _textFieldController,
                  decoration: new InputDecoration.collapsed(hintText: "Описание"),
                  maxLines: null,
                  focusNode: _focusNode,
                  readOnly: isTextFieldEnable, /* change this if read  only is set to false you can enter in text field or if it is set to true you cannot enter any text in TextField. */
                  onChanged: (value) {
                    CheckListModel.checkLists[arg['index']].description = value;
                  },
                  onSubmitted: (value) async {
                    FocusScope.of(context).unfocus();
                    _textFieldController.text = CheckListModel.checkLists[arg['index']].description;
                    CheckListModel checkList = CheckListModel.checkLists[arg['index']];
                    await checkList.writeToFile(checkList.toJson());
                  },
                  textInputAction: TextInputAction.done,
                )),
              ),
              Column(
                mainAxisAlignment: MainAxisAlignment.start,
                children: [
                  IconButton(
                    onPressed: () {
                      setState(() {
                        isTextFieldEnable = false;
                        print(isTextFieldEnable);
                      });
                    },
                    icon: Icon(Icons.edit),
                  ),
                ],
              )
            ],
          ),

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