flutter TextField只能输入0到9和小数点，并且只保留两位小数_flutter textfield 只能输入数字-优快云博客

本文详细描述了如何在Flutter中使用TextField组件创建一个允许用户输入两位小数的数字输入框，包括定制输入限制、装饰器和键盘类型，适用于技术社区的内容创作和IT开发者参考。

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Container(
                  width: double.infinity,
                  height: 54.w,
                  padding: EdgeInsets.symmetric(horizontal: 20.w),
                  alignment: Alignment.center,
                  decoration: BoxDecoration(
                      borderRadius: BorderRadius.circular(5),
                      border: Border.all(width: 1.w,color: JadeColors.grey)
                  ),
                  child: TextField(
                    textAlign: TextAlign.start,
              //      controller: state.cellColumnController,
                    style: TextStyle(fontSize: 24.sp, color: JadeColors.grey_2),
                    keyboardType: TextInputType.number,
                    textInputAction: TextInputAction.done,
                    inputFormatters: [
                      NumberTextInputFormatter(2),
                      FilteringTextInputFormatter(RegExp("[0-9.]"), allow: true),
                    ],
                    maxLines: 1,
                    maxLength: 40,
                    decoration: InputDecoration(
                        filled: true,
                        fillColor: Colors.white,
                        isCollapsed: true,
                        isDense: true,
                        contentPadding: EdgeInsets.zero,
                        hintText: '请输入原价',
                        hintStyle: TextStyle(
                          fontSize: 24.sp,
                          color: JadeColors.grey,
                        ),
                        disabledBorder: OutlineInputBorder(
                            borderSide: BorderSide.none,
                            borderRadius: BorderRadius.circular(8.w)
                        ),
                        enabledBorder: OutlineInputBorder(
                            borderSide: BorderSide.none),
                        focusedBorder: OutlineInputBorder(
                            borderSide: BorderSide.none),
                        border: OutlineInputBorder(
                            borderSide: BorderSide.none),
                        counterText: ''
                    ),
                    onChanged: (value) {},
                    cursorColor: JadeColors.grey,
                  )),