Fiji/ysairplane2/lib/code/YSSearch.dart

import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:ysairplane2/code/YSSearchResult.dart';
import 'package:ysairplane2/tools/YSTools.dart';

class YSSearch extends StatefulWidget {
  @override
  _YSSearchState createState() => _YSSearchState();
}

class _YSSearchState extends State<YSSearch> {
  TextEditingController _searchStr = TextEditingController();
  List<String> _historyList = [];
  @override
  void initState() {
    SharedPreferences.getInstance().then((value){
      setState(() {
        _historyList = value.getStringList('history')??[];
      });
    });
    super.initState();
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      body: SingleChildScrollView(
        child: Container(
          width: MediaQuery.of(context).size.width,
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Container(
                margin: EdgeInsets.only(top: MediaQuery.of(context).padding.top+hsp(42),left: wsp(32),right: wsp(22)),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: [
                    Container(
                      width: MediaQuery.of(context).size.width-wsp(130),
                      padding: EdgeInsets.only(left: wsp(26),right: wsp(26)),
                      height: hsp(66),
                      decoration: BoxDecoration(
                        border: Border.all(color: Color(0xFF007AFF),width: 1),
                        borderRadius: BorderRadius.all(Radius.circular(5))
                      ),
                      child: CupertinoTextField(
                        placeholder: '请输入搜索内容',
                        placeholderStyle: TextStyle(fontSize: zsp(25),color: Color(0xFF545454)),
                        style: TextStyle(fontSize: zsp(25),color: Color(0xFF545454)),
                        prefix: Icon(Icons.search,size: hsp(40),color: Color(0xFF8E8E93),),
                        suffix: GestureDetector(child: Icon(Icons.close,size: hsp(40),color: Color(0xFF8E8E93),),onTap: (){_searchStr.text = '';},),
                        suffixMode: OverlayVisibilityMode.editing,
                        controller: _searchStr,
                        padding: EdgeInsets.all(0),
                        decoration: BoxDecoration(),
                        onSubmitted: (value){
                          if(value.isNotEmpty){
                            if(_historyList.contains(value)){
                              _historyList.remove(value);
                            }
                            _historyList.insert(0, value);
                            SharedPreferences.getInstance().then((prefer){
                              prefer.setStringList('history', _historyList);
                              setState(() {});
                              Navigator.of(context).push(
                                CupertinoPageRoute(
                                  builder: (context){
                                    return YSSearchResult(searchStr: value,);
                                  }
                                )
                              );
                            });
                          }
                        },
                        textInputAction: TextInputAction.search,
                      ),
                    ),
                    GestureDetector(child: Text('取消',style: TextStyle(fontSize: zsp(30),color: Color(0xFF444444)),),onTap: (){Navigator.pop(context);},)
                  ],
                ),
              ),
              Container(
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: [
                    Text('定位/历史',style: TextStyle(fontSize: zsp(24),color: Color(0xFF9A9A9A)),),
                    GestureDetector(
                        child: Icon(Icons.delete,color: Color(0xFFE0E0E0),size: hsp(40),),
                      onTap: (){
                        SharedPreferences.getInstance().then((prefer){
                          _historyList = [];
                          prefer.setStringList('history', _historyList);
                          setState(() {

                          });
                        });
                      },
                    )
                  ],
                ),
                padding: EdgeInsets.only(left: wsp(32),right: wsp(62),top: hsp(34),bottom: hsp(10)),
              ),
              Container(
                height: MediaQuery.of(context).size.height-MediaQuery.of(context).padding.top-hsp(200),
                child: SingleChildScrollView(
                  padding: EdgeInsets.only(left: wsp(16)),
                  child: Wrap(
                    alignment: WrapAlignment.start,
                    children: <Widget>[
                      for (int i =0;i<_historyList.length;i++ ) GestureDetector(
                        behavior: HitTestBehavior.opaque,
                        onTap: (){
                          String value = _historyList[i];
                          _historyList.remove(_historyList[i]);
                          _historyList.insert(0, value);
                          SharedPreferences.getInstance().then((prefer){
                            prefer.setStringList('history', _historyList);
                            setState(() {});
                            Navigator.of(context).push(
                              CupertinoPageRoute(
                                builder: (context){
                                  return YSSearchResult(searchStr: value,);
                                }
                              )
                            );
                          });
                        },
                        child: Container(
                          margin: EdgeInsets.symmetric(vertical: hsp(16), horizontal: hsp(16)),
                          decoration: BoxDecoration(
                              color: Color(0xFFE0E0E0),
                              borderRadius: BorderRadius.all(Radius.circular(3))
                          ),
                          padding: EdgeInsets.only(left: wsp(40), right: wsp(40),top: hsp(20),bottom: hsp(20)),
                          child: Text('${_historyList[i]}', style: TextStyle(fontSize: zsp(26),color: Color(0xFF16181A)), textAlign: TextAlign.center,),
                        ),
                      )
                    ]
                  ),
                ),
              )
            ],
          ),
        ),
        physics: NeverScrollableScrollPhysics(),
      ),
    );
  }
}