我怎样才能在颤振中做同样的信用风格？

Question

我怎样才能在颤振中做同样的信用风格，任何人都可以帮助我吗？ ？？？ 我只需要Formfield。如果我找到了所有的表单域。我可以自定义所有字段文本。 谢谢❤️

Answer 1

试试下面的代码希望它对你有帮助，或者你可以使用 Some Dependency here 或 here 支付卡

用过的包

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

为您的设计创建小部件

 SingleChildScrollView(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.start,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          SizedBox(height:30),
          Container(
            margin: EdgeInsets.symmetric(
              horizontal: 20,
             
            ),
            child: TextFormField(
              inputFormatters: [
                FilteringTextInputFormatter.digitsOnly,
                CardNumberFormatter(),
              ],
              textInputAction: TextInputAction.next,
              keyboardType: TextInputType.number,
              decoration: InputDecoration(
                border: OutlineInputBorder(),
                hintText: 'XXXX XXXX XXXX XXXX',
                labelText: 'Card Number',
              ),
              maxLength: 19,
            ),
          ),
          Container(
            margin: EdgeInsets.symmetric(
              horizontal: 20,
            ),
            child: TextFormField(
              textCapitalization: TextCapitalization.sentences,
              decoration: InputDecoration(
                border: OutlineInputBorder(),
                labelText: 'Name',
                hintText: 'Card Holder Name',
              ),
            ),
          ),
          Container(
            margin: EdgeInsets.symmetric(horizontal: 20, vertical: 20),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                Flexible(
                  child: TextFormField(
                    inputFormatters: [
                      FilteringTextInputFormatter.digitsOnly,
                      DateFormatter(),
                    ],
                    textInputAction: TextInputAction.next,
                    keyboardType: TextInputType.datetime,
                    decoration: InputDecoration(
                        border: OutlineInputBorder(),
                        hintText: 'Card Expiry',
                        labelText: 'MM/YY'),
                    maxLength: 5,
                  ),
                ),
                SizedBox(width: 20),
                Flexible(
                  child: TextFormField(
                    textInputAction: TextInputAction.next,
                    keyboardType: TextInputType.number,
                    obscureText: true,
                    decoration: InputDecoration(
                      border: OutlineInputBorder(),
                      labelText: 'CVV',
                      hintText: 'CVV Number',
                    ),
                    maxLength: 3,
                  ),
                ),
              ],
            ),
          ),
          Container(
            alignment: Alignment.center,
            margin: EdgeInsets.symmetric(horizontal: 20),
            child: ElevatedButton(
              child: Text('Pay'),
              onPressed: () {},
            ),
          ),
        ],
      ),
    ),

为卡号验证

创建一个类

class CardNumberFormatter extends TextInputFormatter {
  @override
  TextEditingValue formatEditUpdate(
    TextEditingValue previousValue,
    TextEditingValue nextValue,
  ) {
    var inputText = nextValue.text;

    if (nextValue.selection.baseOffset == 0) {
      return nextValue;
    }

    var bufferString = new StringBuffer();
    for (int i = 0; i < inputText.length; i++) {
      bufferString.write(inputText[i]);
      var nonZeroIndexValue = i + 1;
      if (nonZeroIndexValue % 4 == 0 && nonZeroIndexValue != inputText.length) {
        bufferString.write(' ');
      }
    }

    var string = bufferString.toString();
    return nextValue.copyWith(
      text: string,
      selection: new TextSelection.collapsed(
        offset: string.length,
      ),
    );
  }
}

为日期验证

创建一个类

class DateFormatter extends TextInputFormatter {
  @override
  TextEditingValue formatEditUpdate(
      TextEditingValue oldValue, TextEditingValue newValue) {
    var text = newValue.text;

    if (newValue.selection.baseOffset == 0) {
      return newValue;
    }

    var buffer = new StringBuffer();
    for (int i = 0; i < text.length; i++) {
      buffer.write(text[i]);
      var nonZeroIndex = i + 1;
      if (nonZeroIndex % 2 == 0 && nonZeroIndex != text.length) {
        buffer.write('/');
      }
    }

    var string = buffer.toString();
    return newValue.copyWith(
        text: string,
        selection: new TextSelection.collapsed(offset: string.length));
  }
}

您的结果屏幕->