升级dart

yzqdev小于 1 分钟

升级dart

注意:如果更新出现错误,就Go inside the flutter/bin folder and delete the cache folder. 然后重新flutter upgrade,让他自己下载dartsdk, 如果无法解压,就安装一下7z->scoop install 7zip

dart sdk下载地址https://storage.flutter-io.cn/dart-archive/channels/stable/release/2.8.3/sdk/dartsdk-windows-x64-release.zip

提示

下面格式 https://storage.flutter-io.cn/dart-archive/channels/<stable|beta|dev>/release/<version>/sdk/dartsdk-<platform>-<architecture>-release.zip

例子

flutter更新地址

https://storage.flutter-io.cn/flutter_infra_release/releases/stable/windows/flutter_windows_3.3.5-stable.zip

升级dart到2.12

@required改为required
可以为null的类型使用string?修饰

组件被废弃

FlatButton被TextButton替代

this is c++ demo code

c++

#include <iostream>
using namespace std;
 
int main() 
{
    cout << "Hello, World!";
    return 0;
}

dart

import 'dart:io';
import 'package:crypto/crypto.dart' as crypto;
import 'dart:typed_data';

bool isPhone(String input) {
  RegExp pathReg = RegExp(r"\.\\");
  return pathReg.hasMatch(input);
}

升级dart

升级dart

升级dart到2.12

组件被废弃

详情