标签：封装 title color app 标题栏 height bool dart final
直播app开发，封装式标题栏实现的相关代码
封装文本组件 text_common.dart
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
class TextCommon extends StatelessWidget {
final String text;
final Color color;
final double size;
final bool bold;
final bool softWrap;
final bool medium;
final bool heavy;
final bool center;
final int maxLines;
final TextDecoration decoration;
final double height;
final TextStyle style;
TextCommon(this.text,
{this.color,
this.size,
this.bold: false,
this.heavy: false,
this.softWrap: false,
this.center: false,
this.medium: false,
this.maxLines,
this.decoration,
this.height, this.style});
@override
Widget build(BuildContext context) {
return Text(
text,
textAlign: center ? TextAlign.center : TextAlign.start,
maxLines: maxLines,
overflow: TextOverflow.ellipsis,
softWrap: softWrap,
style: style ?? TextStyle(
decoration: decoration,
color: color ?? Color(0xFF666666),
fontSize: size ?? 14,
fontWeight: heavy
? FontWeight.w900
: (bold
? FontWeight.bold
: (medium ? FontWeight.w500 : FontWeight.normal)),
height: height ?? 1.4,
),
);
}
封装导航栏组件 app_bar_left_title.dart
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'text_common.dart';
@immutable
class AppBarLeftTitle extends StatelessWidget implements PreferredSizeWidget {
final String title;
final bool hasBack;
final bool isWhiteBack;
final String right;
final VoidCallback onTap;
final Widget centerWidget;
final Widget leading;
final Color rightColor;
final Widget rightWidget;
final Color backgroundColor;
final bool showDividerHorizontal;
final Widget bottomWidget;
final bool isCenterTitle;
final double titleSize;
final double height;
AppBarLeftTitle(
{Key key,
this.backgroundColor,
@required this.title,
this.isWhiteBack = true,
this.hasBack,
this.right,
this.onTap,
this.centerWidget,
this.rightColor,
this.rightWidget,
this.showDividerHorizontal = true,
this.leading,
this.bottomWidget,
this.isCenterTitle: true,
this.titleSize: 18.0,
this.height: 44.0})
: super(key: key);
@override
Widget build(BuildContext context) {
bool canPop = ModalRoute.of(context)?.canPop ?? false;
return AppBar(
elevation: 0,
titleSpacing: 0,
centerTitle: isCenterTitle,
backgroundColor: Colors.black,
actions: rightWidget != null
? [
Padding(
padding: EdgeInsets.only(right: 8),
child: Center(
child: rightWidget,
),
)
]
: [
GestureDetector(
behavior: HitTestBehavior.opaque,
onTap: onTap,
child: Align(
child: Padding(
padding: EdgeInsets.only(right: 16),
child: TextCommon(right ?? '',
color: rightColor ?? Colors.black),
),
),
)
],
leading: canPop
? leading ??
IconButton(
icon: Icon(
Icons.arrow_back_ios,
color: isWhiteBack ? Colors.white : Color(0xFF333333),
size: 22,
),
onPressed: () => Navigator.pop(context))
: Container(),
title: TextCommon(
title ?? '',
size: titleSize,
color: isWhiteBack ? Colors.white : Colors.black,
),
bottom: this.bottomWidget,
);
}
@override
Size get preferredSize => Size.fromHeight(height);
}
组件使用
Scaffold(
appBar: AppBarLeftTitle(
title: '标题',
),
......
)
添加右组件实例
AppBarLeftTitle(
title: '标题',
rightWidget: ButtonCommon(
margin: EdgeInsets.symmetric(horizontal: 10.0),
text: '返回上一级',
fontSize: 12.0,
width: 80,
height: 30,
color: ColorHelper.linkBlue,
circular: 5.0,
onTap: () {
}
),
),
)
以上就是直播app开发，封装式标题栏实现的相关代码， 更多内容欢迎关注之后的文章
标签：封装,title,color,app,标题栏,height,bool,dart,final 来源： https://www.cnblogs.com/yunbaomengnan/p/15784259.html
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