炸裂!成功仿出Flutter微信界面|红包|朋友圈,我在鹅厂等你
FlutterChatroom项目是基于flutter+dart+image_picker等技术实现的仿微信app聊天室实战项目。
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一、技术框架
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编码/技术:Vscode + Flutter 1.12.13/Dart 2.7.0
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视频组件:chewie: ^0.9.7
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图片/拍照:image_picker: ^0.6.6+1
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图片预览组件:photo_view: ^0.9.2
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弹窗组件:SimpleDialog/AlertDialog/SnackBar(flutter封装自定义)
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本地存储:shared_preferences: ^0.5.7+1
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字体图标:阿里iconfont字体图标库
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鉴于flutter基于dart语言,需要安装Dart Sdk / Flutter Sdk
,如何搭建开发环境,可以去官网查阅资料
flutter沉浸式状态栏/底部tabbar
flutter中如何实现顶部全背景沉浸式透明状态栏(去掉状态栏黑色半透明背景),去掉右上角banner,可以去看这篇文章
https://segmentfault.com/a/1190000022483730
flutter图标组件/IconData自定义封装组件
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1、使用系统图标组件:
Icon(Icons.search)
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2、使用IconData方式:
Icon(IconData(0xe60e, fontFamily:'iconfont'), size:24.0)
使用第二种方式需要先下载阿里图标库字体文件,然后在pubspec.yaml中引入字体
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class GStyle {
// __ 自定义图标
static iconfont(int codePoint, {double size = 16.0, Color color}) {
return Icon(
IconData(codePoint, fontFamily: 'iconfont', matchTextDirection: true),
size: size,
color: color,
);
}
}
调用非常简单,可自定义颜色、字体大小;
GStyle.iconfont(0xe635, color: Colors.orange, size: 17.0)
flutter实现badge红点/圆点提示
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class GStyle {
// 消息红点
static badge(int count, {Color color = Colors.red, bool isdot = false, double height = 18.0, double width = 18.0}) {
final _num = count > 99 ? '···' : count;
return Container(
alignment: Alignment.center, height: !isdot ? height : height/2, width: !isdot ? width : width/2,
decoration: BoxDecoration(color: color, borderRadius: BorderRadius.circular(100.0)),
child: !isdot ? Text('$_num', style: TextStyle(color: Colors.white, fontSize: 12.0)) : null
);
}
}
支持自定义红点大小、颜色,默认数字超过99就...显示;
GStyle.badge(0, isdot:true)
GStyle.badge(13)
GStyle.badge(29, color: Colors.orange, height: 15.0, width: 15.0)
flutter聊天页面功能
- 在flutter中如何实现类似上图编辑器功能?通过TextField提供的多行文本框属性
maxLines
就可实现。
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Container(
margin: GStyle.margin(10.0),
decoration: BoxDecoration(color: Colors.white, borderRadius: BorderRadius.circular(3.0)),
constraints: BoxConstraints(minHeight: 30.0, maxHeight: 150.0),
child: TextField(
maxLines: null,
keyboardType: TextInputType.multiline,
decoration: InputDecoration(
hintStyle: TextStyle(fontSize: 14.0),
isDense: true,
contentPadding: EdgeInsets.all(5.0),
border: OutlineInputBorder(borderSide: BorderSide.none)
),
controller: _textEditingController,
focusNode: _focusNode,
onChanged: (val) {
setState(() {
editorLastCursor = _textEditingController.selection.baseOffset;
});
},
onTap: () {handleEditorTaped();},
),
),
- flutter实现滚动聊天信息到最底部
通过ListView里controller属性提供的jumpTo
方法及_msgController.position.maxScrollExtent
ScrollController _msgController = new ScrollController();
...
ListView(
controller: _msgController,
padding: EdgeInsets.all(10.0),
children: renderMsgTpl(),
)
// 滚动消息至聊天底部
void scrollMsgBottom() {
timer = Timer(Duration(milliseconds: 100), () => _msgController.jumpTo(_msgController.position.maxScrollExtent));
}
作者:xiaoyan2015
链接:https://www.imooc.com/article/304608