flutter_app_fuyou/lib/code/YSDiary.dart

import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutterappfuyou/code/base/YSNetWorking.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'YSAddDiary.dart';
import 'YSPhoto.dart';

class YSDiary extends StatefulWidget {
  @override
  _YSDiaryState createState() => _YSDiaryState();
}
String timeSwitch(String timeStr){
  DateTime time = DateTime.parse(timeStr);
  return "${time.day.toString().padLeft(2,'0')}${time.month.toString().padLeft(2,'0')}月";
}
class _YSDiaryState extends State<YSDiary> {
  List dataArray = [];
  int _page = 1;
  ScrollController _scroll = ScrollController();
  String _name = '';
  String _avatar = '';
  @override
  void initState() {
    Future.delayed(Duration(seconds: 0)).then((value){
      this._refreshData();
      _scroll.addListener(() {
        if(_scroll.position.pixels == _scroll.position.maxScrollExtent){
          this._loadMoreData();
        }
      });
    });
    Future<SharedPreferences> prefer = SharedPreferences.getInstance();
    prefer.then((value){
      _name = value.getString('name')??'';
      _avatar = value.getString('avatar')??'';
    });
    super.initState();
  }
  @override
  Widget build(BuildContext context) {
    return CupertinoPageScaffold(
      backgroundColor: Colors.white,
      child: Stack(
        children: [
          Container(
            height: 191.5,
            width: MediaQuery.of(context).size.width,
            child: Image(
              image: AssetImage('lib/images/diarybg.png'),
              fit: BoxFit.fill,
            ),
          ),
          CupertinoButton(
            padding: EdgeInsets.all(0),
            child: Container(
              margin: EdgeInsets.only(left: 15,top: MediaQuery.of(context).padding.top+5),
              child: Icon(Icons.keyboard_arrow_left,size: 30,color: Colors.white,),
            ),
            onPressed: (){
              Navigator.pop(context);
            },
          ),
          Container(
            margin: EdgeInsets.only(top: 170),
            height: MediaQuery.of(context).size.height-170,
            decoration: BoxDecoration(
              borderRadius: BorderRadius.only(topLeft: Radius.circular(20),topRight: Radius.circular(20)),
              color: Colors.white,
            ),
            child: Column(
              children: [
                Container(
                  height: 70,
                  margin: EdgeInsets.only(top: 80,bottom: 20),
                  padding: EdgeInsets.only(left: 20,right: 20),
                  child: Row(
                    children: [
                      Text('今天',style: TextStyle(fontSize: 26,color: Color(0xFF292929),decoration: TextDecoration.none,fontWeight: FontWeight.w600),),
                      CupertinoButton(
                        padding: EdgeInsets.all(0),
                        child: Container(
                          margin: EdgeInsets.only(left: 20),
                          height: 70,
                          width: 70,
                          color: Color(0xFFEFEFEF),
                          child: Icon(Icons.photo_camera,size: 35,color: Color(0xFF8A8A8A),),
                        ),
                        onPressed: (){
                          Navigator.of(context).push(
                            CupertinoPageRoute(
                              builder: (context){
                                return YSAddDiary();
                              }
                            )
                          ).then((value){
                            if(value!=null){
                              _refreshData();
                            }
                          });
                        },
                      )
                    ],
                  ),
                ),
                Container(
                  height: MediaQuery.of(context).size.height-340,
                  child: RefreshIndicator(
                    onRefresh: _refreshData,
                    child: dataArray.length==0?Container(
                      alignment: Alignment.center,
                      child: Image.asset('lib/images/none.png',height: 200,width: 200,),
                    ):ListView.builder(itemBuilder: (context,index){
                      return Container(
                        padding: EdgeInsets.only(left: 20,right: 20,top: 10,bottom: 10),
                        child: Row(
                          crossAxisAlignment: CrossAxisAlignment.start,
                          children: [
                            RichText(
                              text: TextSpan(
                                text: timeSwitch(dataArray[index]['created_at']).substring(0,2),
                                style: TextStyle(fontSize: 26,color: Color(0xFF292929),decoration: TextDecoration.none,fontWeight: FontWeight.w600),
                                children: [
                                  TextSpan(
                                    text: ' '+timeSwitch(dataArray[index]['created_at']).substring(2,timeSwitch(dataArray[index]['created_at']).length),
                                    style: TextStyle(fontSize: 13),
                                  )
                                ]
                              ),
                            ),
                            Container(
                              width: MediaQuery.of(context).size.width-150,
                              padding: EdgeInsets.only(left: 15,right: 15,top: 5),
                              child: Column(
                                children: [
                                  dataArray[index]['body']!=null?Text(dataArray[index]['body'],
                                    style: TextStyle(fontSize: 12,color: Color(0xFF292929),decoration: TextDecoration.none,fontWeight: FontWeight.normal),):Container(),
                                  Container(
                                    margin: EdgeInsets.only(top: dataArray[index]['body']!=null?5:0),
                                    height: dataArray[index]['covers'].length==0?0:dataArray[index]['covers'].length%3!=0?70.0*(((dataArray[index]['covers'].length)~/3)+1):70.0*((dataArray[index]['covers'].length)~/3),
                                    width: MediaQuery.of(context).size.width-150,
                                    child: GridView.builder(
                                      gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
                                        crossAxisCount: 3,
                                      ),
                                      itemBuilder: (context,indexSub){
                                        return GestureDetector(
                                          onTap: (){
                                            Navigator.of(context).push(
                                                CupertinoPageRoute(builder: (context){
                                                  return YSPhotoDetail(url: dataArray[index]['covers'][indexSub],);
                                                })
                                            );
                                          },
                                          child: Container(
                                            height: 70,
                                            width: 70,
                                            margin: EdgeInsets.only(right: 5,top: 5,bottom: 5),
                                            color: Color(0xFFEFEFEF),
                                            child: Image(image: NetworkImage('${dataArray[index]['covers'][indexSub]}'),fit: BoxFit.fill,)
                                          ),
                                        );
                                      },
                                      itemCount: dataArray[index]['covers'].length,
                                      physics: NeverScrollableScrollPhysics(),
                                      padding: EdgeInsets.all(0),
                                    ),
                                  ),
                                  Container(
                                    child: Row(
                                      children: [
                                        dataArray[index]['tag']!=null?Text('#'+dataArray[index]['tag']+'#',
                                          style: TextStyle(fontSize: 12,color: Color(0xFFDB5278),decoration: TextDecoration.none,fontWeight: FontWeight.normal),):Container(),
                                        dataArray[index]['position']!=null?
                                        Text('${dataArray[index]['position']}',style: TextStyle(fontSize: 12,color: Color(0xFF808080),decoration: TextDecoration.none,fontWeight: FontWeight.normal),):Container(),
                                      ],
                                    ),
                                  )
                                ],
                                crossAxisAlignment: CrossAxisAlignment.start,
                              ),
                            ),
                            GestureDetector(
                              child: Container(
                                height: 20,
                                width: 20,
                                child: Image.asset('lib/images/off2.png'),
                              ),
                              onTap: (){
                                showDialog(
                                  context:context,
                                  builder:(context){
                                    return AlertDialog(
                                      title: Text('提示',style: TextStyle(fontSize: 16,color: Color(0xFF292929),decoration: TextDecoration.none,fontWeight: FontWeight.normal),),
                                      content: Text('确认删除此条记录？',style: TextStyle(fontSize: 13,color: Color(0xFF292929),decoration: TextDecoration.none,fontWeight: FontWeight.normal),),
                                      actions: [
                                        CupertinoButton(
                                          padding: EdgeInsets.all(0),
                                          child: Text('取消',style: TextStyle(fontSize: 13,color: Color(0xFF292929),decoration: TextDecoration.none,fontWeight: FontWeight.normal),),
                                          onPressed: (){
                                            Navigator.pop(context);
                                          },
                                        ),
                                        CupertinoButton(
                                          padding: EdgeInsets.all(0),
                                          child: Text('确认',style: TextStyle(fontSize: 13,color: Color(0xFF292929),decoration: TextDecoration.none,fontWeight: FontWeight.normal),),
                                          onPressed: (){
                                            Navigator.pop(context);
                                            _deleteDiaryData(index);
                                          },
                                        ),
                                      ],
                                    );
                                  }
                                );
                              },
                            )
                          ],
                        ),
                      );
                    },itemCount: dataArray.length,padding: EdgeInsets.all(0),controller: _scroll,physics: AlwaysScrollableScrollPhysics(),),
                  ),
                )
              ],
            ),
          ),
          Container(
            margin: EdgeInsets.only(top: 130,left: MediaQuery.of(context).size.width-80),
            height: 70,
            width: 70,
            decoration: BoxDecoration(
              color: Colors.white,
              borderRadius: BorderRadius.all(Radius.circular(35)),
              border: Border.all(color: Colors.white,width: 2),
              image: DecorationImage(image: _avatar==''?AssetImage('lib/images/avtar.png'):NetworkImage(_avatar),fit: BoxFit.fill)
            ),
          ),
          Container(
            margin: EdgeInsets.only(top: 205,left: 15,right: 15),
            width: MediaQuery.of(context).size.width-30,
            height: 20,
            alignment: Alignment.centerRight,
            child: Text(_name,style: TextStyle(fontSize: 14,color: Color(0xFF292929),fontWeight: FontWeight.normal,decoration: TextDecoration.none),overflow: TextOverflow.ellipsis,),
          )
        ],
      ),
    );
  }

  Future<void> _refreshData() async{
    SharedPreferences prefer = await SharedPreferences.getInstance();
    int chapter = prefer.getInt('chapters')??0;
    _page = 1;
    Map request = Map();
    request['category_id'] = chapter+1;
    request['page'] = _page;
    if(chapter>1){
      request['child_id'] = prefer.getInt('childId');
    }
    Map dict = await ysRequestHttpNoLoading(context, requestType.post, 'diary/diary', request);
    if(dict!=null){
      setState(() {
        dataArray = dict['data']['datas']??[];
      });
    }
  }

  Future<void> _loadMoreData() async{
    SharedPreferences prefer = await SharedPreferences.getInstance();
    int chapter = prefer.getInt('chapters')??0;
    _page++;
    Map request = Map();
    request['category_id'] = 1;
    request['page'] = _page;
    if(chapter>1){
      request['child_id'] = prefer.getInt('childId');
    }
    Map dict = await ysRequestHttp(context, requestType.post, 'diary/diary', request);
    if(dict!=null){
      setState(() {
        dataArray.addAll(dict['data']['datas']??[]);
      });
    }
  }

  _deleteDiaryData(int index) async{
    Map dict = await ysRequestHttp(context, requestType.delete, 'diary/delete', {'id':dataArray[index]['id']});
    if(dict!=null){
      setState(() {
        dataArray.removeAt(index);
      });
    }
  }
}