Flutter高仿微信-第23篇-支付-设置金额

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详情请查看

效果图：

实现代码：

/**
 * Author : wangning
 * Email : maoning20080809@163.com
 * Date : 2022/10/27 15:57
 * Description : 二维码设置金额
 */

class QRCodeSetAmount extends StatefulWidget {

  @override
  State createState() => _QRCodeSetAmountState();

}

class _QRCodeSetAmountState extends State{

  TextEditingController _contentController = TextEditingController(text: "");
  FocusNode _contentFocusNode = FocusNode();
  bool isHideDigitalKeyboard = true;

  @override
  void initState() {
    super.initState();
    _contentFocusNode.addListener(() {
      isHideDigitalKeyboard = !isHideDigitalKeyboard;
      setState(() {
      });
    });
  }

  @override
  Widget build(BuildContext context) {

    return Scaffold(
      appBar: WnAppBar.getAppBar(context, Text("设置金额")),

      body: GestureDetector(
        behavior: HitTestBehavior.translucent,
        onTap: (){
          _contentFocusNode.unfocus();
        },
        child: Container(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Container(
                margin: EdgeInsets.only(left:12, top: 30),
                child: Text("收款金额", style: TextStyle(fontSize: 20, color: Colors.black),),
              ),

              Row(
                children: [
                  Container(
                    margin: EdgeInsets.only(left:12),
                    child: Text("￥", style: TextStyle(fontSize: 30, color: Colors.black),),
                  ),
                  Expanded(child: getContentWidget(),),
                ],
              ),

              Expanded(child: Text("")),

              Container(
                child: Offstage(
                  offstage: isHideDigitalKeyboard,
                  child: WnDigitalKeyboard(contentController: _contentController, buttonName: "确定",  onRechange: (data){
                    Navigator.pop(context, data);
                  },),
                ),
              )
            ],
          ),
        ),
      ),
    );
  }


  //输入框
  Widget getContentWidget(){
    return Container(
      margin: EdgeInsets.only(left: 12, right: 12),
      child: TextField(
        maxLines: 1,
        readOnly: true,
        controller: _contentController,
        focusNode: _contentFocusNode,
        cursorColor: Colors.black,
        decoration: InputDecoration(
          hintText: "请输入金额...",
          hintStyle: TextStyle(
            fontSize: 16,
            color: Colors.grey.withOpacity(0.8),
          ),
        ),
      ),
    );
  }

}