Flutter自定义Dialog

flutter自定义对话框其实很好弄，直接把大概布局写出来，然后把公共参数抽出来，直接进行引用即可，下面是我写的效果图：

ok，直接上代码吧。

import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

///自定义Dialog
class HtmlDialog extends StatefulWidget {
  //------------------不带图片的dialog------------------------
  final String title; //弹窗标题
  final String content; //弹窗内容
  final String confirmContent; //按钮文本
  final Color confirmTextColor; //确定按钮文本颜色
  final bool isCancel; //是否有取消按钮，默认为true true：有 false：没有
  final Color confirmColor; //确定按钮颜色
  final Color cancelColor; //取消按钮颜色
  final bool outsideDismiss; //点击弹窗外部，关闭弹窗，默认为true true：可以关闭 false：不可以关闭
  final Function confirmCallback; //点击确定按钮回调
  final Function dismissCallback; //弹窗关闭回调

  //------------------带图片的dialog------------------------
  final String image; //dialog添加图片
  final String imageHintText; //图片下方的文本提示

  const HtmlDialog(
      {Key key,
      this.title,
      this.content,
      this.confirmContent,
      this.confirmTextColor,
      this.isCancel = true,
      this.confirmColor,
      this.cancelColor,
      this.outsideDismiss = true,
      this.confirmCallback,
      this.dismissCallback,
      this.image,
      this.imageHintText})
      : super(key: key);

  @override
  State<StatefulWidget> createState() {
    return _CustomDialogState();
  }
}

class _CustomDialogState extends State<HtmlDialog> {
  _confirmDialog() {
    _dismissDialog();
    if (widget.confirmCallback != null) {
      widget.confirmCallback();
    }
  }

  _dismissDialog() {
    if (widget.dismissCallback != null) {
      widget.dismissCallback();
    }
    Navigator.of(context).pop();
  }

  @override
  Widget build(BuildContext context) {
    final size = MediaQuery.of(context).size;
    final width = size.width;

    Column _columnText = Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: <Widget>[
        SizedBox(height: widget.title == null ? 0 : 16.0),
        Container(
          margin: EdgeInsets.only(
              top: ScreenUtil().setHeight(40),
              right: ScreenUtil().setWidth(40),
              left: ScreenUtil().setWidth(40),
              bottom: ScreenUtil().setHeight(30)),
          child: Text(widget.title == null ? '' : widget.title,
              style: TextStyle(fontSize: 16.0)),
        ),
        Expanded(
            child: Container(
              margin: EdgeInsets.only(
                right: ScreenUtil().setWidth(40),
                left: ScreenUtil().setWidth(40),
              ),
              child: Text(widget.content == null ? '' : widget.content,
                  style: TextStyle(fontSize: 15.0, color: Colors.black54)),
            ),
            flex: 1),
        //SizedBox(height: 1.0, child: Container(color: Color(0xDBDBDBDB))),
        Container(
            //height: 45,
            child: Row(
          children: <Widget>[
            Expanded(
              child: Container(
                margin: EdgeInsets.only(
                    right: ScreenUtil().setWidth(40),
                    left: ScreenUtil().setWidth(40),
                    bottom: ScreenUtil().setHeight(50)),
                child: RaisedButton(
                  child: Text(
                    widget.confirmContent,
                    style: TextStyle(
                      fontSize: 16,
                      color: Colors.white,
                    ),
                  ),
                  color: Colors.blue,
                  onPressed: () {
                    _confirmDialog();
                  },
                  shape: StadiumBorder(
                      side: BorderSide(color: Colors.lightBlueAccent)),
                ),
              ),
              flex: 1,
            ),
          ],
        ))
      ],
    );

    Column _columnImage = Column(
      children: <Widget>[
        SizedBox(
          height: widget.imageHintText == null ? 35.0 : 23.0,
        ),
        Image(
            image: AssetImage(widget.image == null ? '' : widget.image),
            width: 72.0,
            height: 72.0),
        SizedBox(height: 10.0),
        Text(widget.imageHintText == null ? "" : widget.imageHintText,
            style: TextStyle(fontSize: 16.0)),
      ],
    );

    return WillPopScope(
        child: GestureDetector(
          onTap: () => {widget.outsideDismiss ? _dismissDialog() : null},
          child: Material(
            type: MaterialType.transparency,
            child: Center(
              child: Container(
                width: widget.image == null ? width - 100.0 : width - 150.0,
                height: 200.0,
                alignment: Alignment.center,
                child: widget.image == null ? _columnText : _columnImage,
                decoration: BoxDecoration(
                    color: Color(0xFFFFFFFF),
                    borderRadius: BorderRadius.circular(12.0)),
              ),
            ),
          ),
        ),
        onWillPop: () async {
          return widget.outsideDismiss;
        });
  }
}

下面是引用方式：