writeToFile function
写入到文件
Implementation
Future<File> writeToFile(String path, String data, {bool append = false}) async {
File mFile = File(path);
if (append) {
/// 追加
String res = "";
if (!mFile.existsSync()) {
createFile(path);
} else {
res = await mFile.readAsString();
}
return mFile.writeAsString("$res$data");
} else {
if (!mFile.existsSync()) {
createFile(path);
}
return mFile.writeAsString(data);
}
}