通过 Dart 中的循环写入文件

Question

我正在尝试将一系列字符串写入文件，Letters.txt。

 import "dart:io";

 main() {
   List letters = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k"];
   File file = new File("Letters.txt");
   for (int i = 0; i < 10; i++) {
     file.writeAsString("${letters[i]}", mode: FileMode.APPEND);
   }
 }

当打开文件Letters.txt时，它应该显示"abcdefghij"，但是却显示"j"。关于我做错了什么的任何想法？我尝试了 FileMode: WRITE、WRITE_ONLY_APPEND 和 WRITE_ONLY，但其中 none 也有效。

Answer 1

您需要使用

 file.writeAsStringSync("${letters[i]}", mode: FileMode.append);

或

main() async {
  List letters = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k"];
  File file = new File("Letters.txt");
  for (int i = 0; i < 10; i++) {
    await file.writeAsString("${letters[i]}", mode: FileMode.append);
  }
}

通过 Dart 中的循环写入文件

Writing to a file through a loop in Dart

dart

dart-io