如何在flutter中通过字符串名称访问类的元素 [英] How to access to element of a class by string name in flutter

问题描述

我从api获得了很棒的字体名称，我想访问font_awesome_flutter包的元素，但是我在C#中知道它，但在flutter中却不知道:从服务器收到:

I get name of font awesome from api that I want to access element of font_awesome_flutter package but I know it in C# but I do not know in flutter: received from server:

{
  "fontawesomeName":"breadSlice"
} 

在font_awesome包中，我可以通过以下方式访问其元素

in font_awesome package I can access its element by below

 IconButton(
            icon: FaIcon(FontAwesomeIcons.breadSlice),
             onPressed: () { print("Pressed"); }
           )

但是如何在flutter中访问具有字符串名称的对象的元素?

But How do I access element of object with string name in flutter?

推荐答案

在Flutter中这是不可能的，因为已禁用反射.唯一的方法是创建映射.例如:

This is not possible in Flutter because reflection is disabled. The only way is to create a mapping. For example:

const Map<String, IconData> map = {
  "breadSlice": FontAwesomeIcons.breadSlice,
};

IconData getIcon(String iconName) {
  return map[iconName];
}

这篇关于如何在flutter中通过字符串名称访问类的元素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！