jscore中类的使用问题

[xioxin]

我在dart里创建的类,js里初始化后返回到dart再取值发现取到的都是最后一个

js执行的: [new Text('测试1'), new Text('测试2'), new Text('测试3')];
到dart中取到的内容是 (测试3, 测试3, 测试3)
全部变成最后一个了

大佬帮忙看看是不是用的方法不对.

完整代码如下:

class TestBug extends StatelessWidget {

  static Pointer jsClassInitialize(
      Pointer ctx,
      Pointer constructor,
      int argumentCount,
      Pointer<Pointer> arguments,
      Pointer<Pointer> exception) {
    String text;
    final context = JSContext(ctx);
    final that = JSValue(context, constructor).toObject();
    if (argumentCount >= 1) {
      final arg1 = JSValue(context, arguments[0]);
      if (arg1.isString) {
        text = arg1.string;
      }
    }
    that.setProperty(
        'text',
        JSValue.makeString(context, text),
        JSPropertyAttributes.kJSPropertyAttributeDontDelete);
    return constructor;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
          child: RaisedButton(
            child: Text('TEST'),
            onPressed: () {
              final jsContext = JSContext.createInGroup();
              final classDef = JSClassDefinition(
                version: 0,
                attributes: JSClassAttributes.kJSClassAttributeNone,
                className: 'Text',
                callAsConstructor: Pointer.fromFunction(jsClassInitialize),
                staticFunctions: [],
              );
              var flutterJSClass = JSClass.create(classDef);
              var flutterJSObject = JSObject.make(jsContext, flutterJSClass);
              jsContext.globalObject.setProperty('Text', flutterJSObject.toValue(),
                  JSPropertyAttributes.kJSPropertyAttributeDontDelete);
              final data = jsContext.evaluate("""
              [new Text('测试1'), new Text('测试2'), new Text('测试3')]
            """);
              final list = jsValueToList(data).map((e) => e.toObject().getProperty('text').string);
              print(list);
             // I/flutter ( 8752): (测试3, 测试3, 测试3)
            },
          )),
    );
  }
}

[xioxin]

经过尝试代码改成这样就可以恢复正常
final that = JSValue(context, constructor).toObject(); 替换成 final that = JSObject.make(context, jsClass);
这里相当于重新new了个类返回出去了.
jsClassInitialize方法会被多触发一遍.
不清楚是不是正确的用法，不过暂时解决问题了。

class TestBug extends StatelessWidget {
  static JSClassDefinition classDef = JSClassDefinition(
    version: 0,
    attributes: JSClassAttributes.kJSClassAttributeNone,
    className: 'Text',
    initialize: Pointer.fromFunction(jsClassInitialize),
    callAsConstructor: Pointer.fromFunction(jsClassConstructor),
    staticFunctions: [],
  );
  static JSClass jsClass = JSClass.create(classDef);

  static Pointer jsClassConstructor(
      Pointer ctx,
      Pointer constructor,
      int argumentCount,
      Pointer<Pointer> arguments,
      Pointer<Pointer> exception) {
    String text;
    final context = JSContext(ctx);
    final that = JSObject.make(context, jsClass);
    if (argumentCount >= 1) {
      final arg1 = JSValue(context, arguments[0]);
      if (arg1.isString) {
        text = arg1.string;
      }
    }
    that.setProperty('text', JSValue.makeString(context, text),
        JSPropertyAttributes.kJSPropertyAttributeDontDelete);
    return that.pointer;
  }

  static void jsClassInitialize(Pointer ctx, Pointer object) {
    print('jsClassInitialize');
//    final context = JSContext(ctx);
//    final obj = JSObject(context, object);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
          child: RaisedButton(
        child: Text('TEST'),
        onPressed: () {
          final jsContext = JSContext.createInGroup();
          var flutterJSObject = JSObject.make(jsContext, jsClass);
          jsContext.globalObject.setProperty('Text', flutterJSObject.toValue(),
              JSPropertyAttributes.kJSPropertyAttributeDontDelete);
          final data = jsContext.evaluate("""
              [new Text('测试1'), new Text('测试2'), new Text('测试3')]
            """);
          final list = jsValueToList(data)
              .map((e) => e.toObject().getProperty('text').string);
          print(list);
        },
      )),
    );
  }
}