确实令人困惑的错误:类型'Screen'不是'function result''Screen'类型的子类型

Question

嗨,我正在写一个Dart应用程序,我收到错误:

type 'Screen' is not a subtype of type 'Screen' of 'function result'.

我真的不知道实际的错误是什么？

我的代码如下:

class CanvasManager {
  Map<String, Screen> _canvases = new Map<String, Screen>();
  CanvasManager (Map<String, CanvasElement> reqCanvas, int sizeX, int sizeY, bool fullscreen) {
    reqCanvas.forEach((k,v) {
      _canvases[k] = new Screen.create(v, sizeX, sizeY, fullscreen);
    });
  }
  Screen getCanvas(String c) {
    if (_canvases.containsKey(c)) {
    return _canvases[c];
    }
    else throw "No such canvas with key ${c}";
  }
}

出于某种原因,当我在该类实例时出现错误.

需要注意的Screen是我创建的课程.由于我完全受到了保护,我不知道它是否会通过给你这门课程来帮助你.它有点长,所以我会粘贴它:http://pastebin.com/KvZ54yPe

Answer 1

固定它!

屏幕已经是dart:html中的类名.编译器真的应该告诉你是否重用了一个带有某种警告的类名,但事实并非如此.