Question

你好有谁知道我怎么只能用字母生成字符串。喜欢：

“skdnjfsd”还是“bdfvkjnd”？

我当前的代码：

String _randomString(int length) {
    var rand = new Random();
    var codeUnits = new List.generate(
        length,
            (index){
          return rand.nextInt(33)+89;
        }
    );

    return new String.fromCharCodes(codeUnits);
  }

Answer 1

根据@julemand101 的回答，您可以这样做：

import 'dart:math';

void main() {
  print(getRandomString(5));  // 5GKjb
  print(getRandomString(10)); // LZrJOTBNGA
  print(getRandomString(15)); // PqokAO1BQBHyJVK
}

const _chars = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz1234567890';
Random _rnd = Random();

String getRandomString(int length) => String.fromCharCodes(Iterable.generate(
    length, (_) => _chars.codeUnitAt(_rnd.nextInt(_chars.length))));```

Answer 2

在你的代码中实现这个函数

String getRandom(int length){
    const ch = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz';
    Random r = Random();
    return String.fromCharCodes(Iterable.generate(
    length, (_) => ch.codeUnitAt(r.nextInt(ch.length))));
}

然后用长度调用它

原答案：How to generate random string in dart?

Flutter 如何生成随机字符串

2 个答案: