如何使用Reflection（Mirrors）访问Dart类中的方法名？ [英] How can I use Reflection (Mirrors) to access the method names in a Dart Class?

问题描述

我需要获取Dart类中的方法。

我该如何做？

我可以看一个例子吗？

解决方案

以下是一个简单的可复制粘贴代码示例：

  import 'dart：mirrors'; 
 import'dart：io'; 
 
 main（）{
 var im = reflect（new File（'test'））; //检索某个类实例的InstanceMirror。 
 im.type.methods.values.forEach（（MethodMirror method）=> print（method.simpleName））; 
} 
  

输出为：

  existsSync 
 _delete 
存在
目录
 _getDecodedLines 
 readAsTextSync 
 readAsBytesSync 
 readAsLinesSync 
 _directory 
 throwIfError 
 lastModifiedSync 
 readAsLines 
 open 
 _ensureFileService 
 deleteSync 
 delete 
 _exists 
 length 
 openInputStream 
 create 
 _create 
 readAsText 
 _openStdioSync 
 openOutputStream 
 _fullPath 
 _lastModified 
 fullPathSync 
 readAsBytes 
 lastModified 
 _openStdio 
 _open 
 openSync 
 lengthSync 
 directorySync 
 fullPath 
 createSync 
 _lengthFromName 
  

I need to "fetch" the methods in a Dart Class.

How can I do this?

And I want to be able to call the methods.

May I see an example?

解决方案

Here's an easy copy-pasteable code sample:

import 'dart:mirrors';
import 'dart:io';

main() {
  var im = reflect(new File('test')); // Retrieve the InstanceMirror of some class instance.
  im.type.methods.values.forEach((MethodMirror method) => print(method.simpleName));
}

Output is:

existsSync
_delete
exists
directory
_getDecodedLines
readAsTextSync
readAsBytesSync
readAsLinesSync
_directory
throwIfError
lastModifiedSync
readAsLines
open
_ensureFileService
deleteSync
delete
_exists
length
openInputStream
create
_create
readAsText
_openStdioSync
openOutputStream
_fullPath
_lastModified
fullPathSync
readAsBytes
lastModified
_openStdio
_open
openSync
lengthSync
directorySync
fullPath
createSync
_lengthFromName

这篇关于如何使用Reflection（Mirrors）访问Dart类中的方法名？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！