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flutterunit's Issues

Cons是什么?

在基础组建库中m
decoration: BoxDecoration(
//添加渐变色
gradient: LinearGradient(
stops: stops,
colors: Cons.rainbow.map((e) => Color(e)).toList()),
borderRadius: BorderRadius.only(
topLeft: Radius.circular(50),
bottomRight: Radius.circular(50)),
boxShadow: [
BoxShadow(
color: Colors.grey,
offset: Offset(1, 1),
blurRadius: 10,
spreadRadius: 1),
]),
其中Cons是什么?我的版本是1.17.1

红米8A,安装失败

正好在学习flutter,感谢大佬.打算体验安装,结果安装失败. 手机提示.失败原因: 其它原因.

怎么运行起来是白屏

依赖装完之后,用Xcode运行起来直接打印下面问题
2020-04-24 16:25:53.655760+0800 Runner[7781:1889055] Failed to find assets path for "Frameworks/App.framework/flutter_assets"
2020-04-24 16:25:53.929452+0800 Runner[7781:1889055] Metal API Validation Enabled
2020-04-24 16:25:54.433538+0800 Runner[7781:1889234] [VERBOSE-2:engine.cc(127)] Engine run configuration was invalid.
2020-04-24 16:25:54.433755+0800 Runner[7781:1889234] [VERBOSE-2:shell.cc(437)] Could not launch engine with configuration.
2020-04-24 16:25:54.453264+0800 Runner[7781:1889243] flutter: Observatory listening on http://127.0.0.1:53261/ObwJBGhGVG8=/

+ 0019 [样式] 如何改变按钮Button的高度?

Botton相关的样式由ButtonTheme进行管理。默认高度是36

---->[flutter/packages/flutter/lib/src/material/button_theme.dart:250]<----
  const ButtonThemeData({
    this.textTheme = ButtonTextTheme.normal,
    this.minWidth = 88.0,
    this.height = 36.0, <----
    EdgeInsetsGeometry padding,

+ 0007 Dart里三个点 ... 是什么语法?

main() {
  var isJava=true;
  <String>[
    if (isJava) "Java" else "NO java",//dart2.3+ 数组元素内可进行if判断
    "Dart",
    "Swift",
    ...["Kotlin", "python"]//将一个数组中的元素进行解构成一个个元素
  ];
}

+ 0004 如何让flutter自动加载不同分辨率的图片资源?

不同分辨率的图片分别放在2.0x,3.0x等文件夹下,会自动加载。注意:不需要1.0x文件夹但必须有1.0x的图片,比如存在image文件夹,则1.0x的图片直接放在image文件夹下,并在image文件夹下创建2.0x、3.0x文件夹,里面放入相应分辨率的图片


image

DataTable表格显示不全

demo中DataTable表格右侧显示不完整。另外想请教一下,如果想用dataTable(毕竟自带复选)而不是Table,如何做到按照屏幕自动均分或按比例分宽度?

提问

有些页面点击进去的时候路由动画明显卡顿掉帧。。
我是小米mix2 。
这是什么原因。初始化的时候child组件太多了嘛

iOS 跑起来是空白页

这是报错信息

"Frameworks/App.framework/flutter_assets"
2020-04-22 23:46:15.168972+0800 Runner[5419:2029601] [VERBOSE-2:engine.cc(127)] Engine run configuration was invalid.
2020-04-22 23:46:15.169085+0800 Runner[5419:2029601] [VERBOSE-2:shell.cc(437)] Could not launch engine with configuration.

+ 0000 【MacOS】【Windows】配置Flutter环境、创建Flutter初始项目

一、Mac配置Flutter环境

1.下载 Flutter SDK: https://flutter.dev/docs/development/tools/sdk/releases

根据需求下载FlutterSDK版本,一般使用稳定版的最新版本。


2.解压后添加环境变量: vim ~/.bash_profile

解压

export PATH= flutterSDK磁盘路径/bin:$PATH
export PUB_HOSTED_URL=https://pub.flutter-io.cn
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn

3. 通过命令行查看环境是否ok : flutter --version

屏幕快照 2019-10-29 下午7 20 02

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