AbBuilder<C extends AbController> class

class Controller extends AbController {
  final Ab<int> count = 0.ab;
}

创建控制器并使用

class XXX extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return AbBuilder<Controller>(
        controller: Controller(),
        tag: tag,
        builder: (Controller controller, Abw<Controller> abw){
            return Text(controller.count.get(abw).toString);
          }
      );
  }
}

如果控制器已被创建过，则直接这样做：

class XXX extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return AbBuilder<Controller>(
        builder: (Controller controller, Abw<Controller> abw){
            return Text(controller.count.get(abw).toString);
          }
      );
  }
}

如果要使用多个 controller，则可以使用嵌套的方式:

class XXX extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return AbBuilder(
        controller OneController(),
        builder: (OneController one, Abw<OneController> oneAbw){
            return AbBuilder(
              controller TwoController(),
              builder: (TwoController two, Abw<TwoController> twoAbw){
                  return Column(
                      children: [
                          Text(one.count.get(oneAbw).toString),
                          Text(two.count.get(twoAbw).toString),
                        ]
                    );
                }
            );
          }
      );
  }
}

controller 禁止使用 Aber.find, 只能用构造函数进行创建，例如： controller: Aber.find

主要目的是为了保证当前 widget 与当前 controller 的生命周期相对应（比如 initState/dispose）：

如果在父 AbBuilder 中创建了 controller，子 AbBuilder find 了这个父 controller,
那么子 AbBuilder 被销毁时，不会将这个父 controller 销毁，
只有在父 AbBuilder 被销毁时，才会将这个父 controller 销毁。
也就是说，controller 在 AWidget 中被创建，只有当该 AWidget 被销毁时，它才会被自动销毁。

Inheritance

Constructors

AbBuilder({Key? key, C? controller, String? tag, required Widget builder(C controller, Abw<C> abw)}): const

Properties

builder → Widget Function(C controller, Abw<C> abw): final
controller → C?: final
hashCode → int: The hash code for this object.
no setterinherited
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
tag → String?: final

Methods

createElement() → StatefulElement: Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<AbBuilder<C>>: Creates the mutable state for this widget at a given location in the tree.
override
debugDescribeChildren() → List<DiagnosticsNode>: Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode: Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String: A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String: Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String: Returns a one-line detailed description of the object.
inherited
toStringShort() → String: A short, textual description of this widget.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited

AbBuilder<C extends AbController> class

Constructors

Properties

Methods

Operators

aber library