将此添加到路由器链接模态底部表中

 showModalBottomSheet(              
     context: context,
     isScrollControlled: true,
      builder: (BuildContext context) {
      return Messagescr();
      }
    );

在你的脚手架上也去掉这条线:

resizeToAvoidBottomInset : false,
            

简单的解决方案，你可以自定义这个:

Container(
          margin: EdgeInsets.only(left: 15),
          child: InkWell(
              onTap: () {
                showModalBottomSheet(
                    isScrollControlled : true,
                    context: context,
                    backgroundColor: Colors.transparent,
                    builder: (context) {
                      return Container(
                        padding: EdgeInsets.only(top: 15, left: 15, right: 15, bottom: 10),
                        width: double.infinity,
                        decoration: BoxDecoration(
                          color: AppTheme.leadItemColor1,
                          borderRadius: BorderRadius.only(topLeft: Radius.circular(12), topRight: Radius.circular(12)),
                        ),
                        child: Column(
                          children: [
                            _assignTo(widget.viewModel, context),
                            SizedBox(height: 12,),
                            txtComment(widget.viewModel),
                            SizedBox(height: 12,),
                            CRMButton(
                              title: 'Select',
                              onTap: () async {
                                Navigator.pop(context);
                                await widget.viewModel.updateStatus(7, why: "${ConstantData.lostOptions[_selectedNumber]}");
                              },
                            )
                          ],
                        ),
                      );
                    },
                );
              },
              child: CustomTabBarItem1(
                image: widget.viewModel.leadDetail.success.lStatus == 7 ? 'assets/appimages/LeadDetail/icons-03-01.png' : 'assets/appimages/LeadDetail/icons-04-01.png',
                bottomTitle: 'Lost',
                topTitle: widget.viewModel.leadDetail.success.lStatus > 7 ? 'assets/appimages/LeadDetail/Ellipse 61@2x.png' : widget.viewModel.leadDetail.success.lStatus == 7 ? 'assets/appimages/LeadDetail/Group 486-1.png' : 'assets/appimages/LeadDetail/Ellipse-61@3x.png',
                height : widget.viewModel.leadDetail.success.lStatus == 7 ? "0" : "1",
              )),
        ),

添加:

isScrollControlled: true表示showModalBottomSheet 填充:MediaQuery.of(上下文)。viewInsets为生成器中的小部件 列/换行都可以

showModalBottomSheet<void>(
  isScrollControlled: true,
  context: context,
  shape: RoundedRectangleBorder(
    borderRadius: BorderRadius.only(
        topLeft: Radius.circular(30.0),
        topRight: Radius.circular(30.0)),
  ),
  builder: (BuildContext context) {
    return Padding(
        padding: MediaQuery.of(context).viewInsets,
        child: Container(
            child: Wrap(
          children: <Widget>[
            TextField(
              decoration: InputDecoration(
                  border: InputBorder.none,
                  hintText: 'Enter a search term'),
            ),
            TextField(
              decoration: InputDecoration(
                  border: InputBorder.none,
                  hintText: 'Enter a search term'),
            ),
            TextField(
              decoration: InputDecoration(
                  border: InputBorder.none,
                  hintText: 'Enter a search term'),
            ),
            TextField(
              decoration: InputDecoration(
                  border: InputBorder.none,
                  hintText: 'Enter a search term'),
            )
          ],
        )));
  },
);

更新2020年2月25日更好的解决方案

showModalBottomSheet(
 isScrollControlled: true,
 builder: (BuildContext context) {

    return SingleChildScrollView(
      child: Container(
        padding:
            EdgeInsets.only(bottom: MediaQuery.of(context).viewInsets.bottom),
        child: Padding(
          padding: const EdgeInsets.fromLTRB(20.0, 20.0, 20.0, 0.0), // content padding
          child: Form(...)) // From with TextField inside


});

用脚手架小部件包装表单，然后用SingleChildScrollView包装TextFormField:

 return Container(
          height: screenHeight * .66,
          child: Scaffold(
             body: Form(
               key: _form,
               child: SingleChildScrollView(
                 child:TextFormField()
               )
              )
             )
           )

你应该用这个，

showModalBottomSheet(
    isScrollControlled: true,
    context: context,
    shape: RoundedRectangleBorder(
      // <-- for border radius
      borderRadius: BorderRadius.only(
        topLeft: Radius.circular(10.0),
        topRight: Radius.circular(10.0),
      ),
    ),
    builder: (BuildContext context) {
      return SingleChildScrollView(
        padding:
            EdgeInsets.only(bottom: MediaQuery.of(context).viewInsets.bottom),
        child: drunkenWidget()...

//BTW, Never ever Drink

如果你还没有找到你的问题。我认为你们在BuilderContext中漏掉了。有时候当你实现modalBottomSheet时，它只会给你context参数。用BuildContext添加context。

 builder: (BuildContext context) {  //-Here is your issue add BuilderContext class name as it as 
          return Padding(
            padding: MediaQuery.of(context).viewInsets,
            child: SingleChildScrollView(
              child: Padding(
                padding: EdgeInsets.only(bottom: MediaQuery.of(context).viewInsets.bottom),
                child: new Container(