Flutter - 简单封装 showModalBottomSheet （仿iOS效果）

##### demo 地址: https://github.com/iotjin/jh_flutter_demo

效果图

使用方法

导入 jhBottomSheet.dart

  JhBottomSheet.showText(
            context,
           dataArr:['hello', 'world', "123", "456"],
//            title: "请选择",
//            showRedText: true,
            clickCallback:(index,text) {
                print(index); print(text);
              }
          );

//---------------------------------------------------------------------

          JhBottomSheet.showText(
              context,
              dataArr:["退出登录"],
              title: "请选择操作",
              showRedText: true,
              clickCallback:(index,text) {
                print(index); print(text);
              }
          );

JhBottomSheet代码

import 'package:flutter/material.dart';

typedef ClickCallback = void Function(int selectIndex,String selectString);



const double cellHeight = 50.0;
const double spaceHeight = 5.0;
const Color spaceColor = Color(0xFFE6E6E6);//230

const Color textColor = Color(0xFF323232);//50
const double textFontSize = 18.0;

const Color redTextColor = 	Color(0xFFE64242); //rgba(230,66,66,1)

const Color titleColor = Color(0xFF787878);//120
const double titleFontSize = 13.0;


class JhBottomSheet {


  //弹出底部文字
  static void showText(
      BuildContext context, {
        @required ListdataArr,
        String title,
        bool showRedText=false,
        ClickCallback clickCallback
      }) {

          var titleHeight = cellHeight;
          var titltLineHeight = 1.0;
          if(title==null){
            titleHeight = 0.0;
            titltLineHeight = 0.0;
          }
          var _textColor = textColor;
          if(showRedText){
            _textColor = redTextColor;
          }

           showModalBottomSheet(
              context: context,
              builder: (BuildContext context){
                return
                SafeArea(
                  child:
                  Container(
                    color: Colors.white,
                    height: cellHeight*(dataArr.length+1)+(dataArr.length-1)*1+spaceHeight+titleHeight+titltLineHeight,
                    child: Column(
                      children: [

                        Container(
                            height: titleHeight,
                            child: Center(child: Text(title??"",style: TextStyle(fontSize: titleFontSize,color: titleColor),textAlign: TextAlign.center))
                        ),
                        SizedBox(height: titltLineHeight,child: Container(color: spaceColor)),

                        ListView.separated(
                          itemCount: dataArr.length,
                          shrinkWrap: true,
                          itemBuilder: (BuildContext context, int index) {
                            return
                              GestureDetector(
                                child:  Container(
                                    height: cellHeight,
                                    color: Colors.white,
                                    child:
                                    Center(
                                        child:Text(dataArr[index],style: TextStyle(fontSize: textFontSize,color: _textColor),textAlign: TextAlign.center)
                                    )
                                ),
                                // onTap: () => Navigator.of(context).pop(index),
                                onTap: (){
                                  Navigator.of(context).pop(index);
                                  clickCallback(index,dataArr[index]);
                                },
                              );
                          },

                          separatorBuilder: (context, index) {
                            return Divider(
                              height: 1,
                              color: spaceColor,
                            );
                          },
                        ),

                        SizedBox(height: spaceHeight,child: Container(color: spaceColor)),
                        GestureDetector(
                          child: Container(
                              height: cellHeight,
                              color: Colors.white,
                              child: Center(child: Text("取消",style: TextStyle(fontSize: textFontSize,color: textColor),textAlign: TextAlign.center))
                          ),
                          onTap: (){
                            Navigator.of(context).pop();
                          },
                        )

                      ],
                    ),
                  )
                );

              }
            );
       }




}