问题描述
此问题类似于，但我需要访问父成员（不是控制）。我不知道是否可以不使用依赖注入。
This question is similar to this, but I need to access parent member (not control). I don't know if is possible to do without using Dependency Injection.
例如，我有一个Parent，有一个成员调用User，我需要从子进程控制器到用户。
For example, I have a Parent with have a member calls User, I need to access from child controller to User.
推荐答案
只需将父控制器的引用传递给父控制器的 initialize（）方法：
Just pass the reference from the parent controller to the child controller in the parent controller's initialize() method:
ParentController.java：
ParentController.java:
public class ParentController {
@FXML
private ChildController childController ;
private User user ;
public void initialize() {
user = ...;
childController.setUser(user);
}
}
ChildController.java：
ChildController.java:
public class ChildController {
private User user ;
public void setUser(User user) {
this.user = user ;
}
}
您也可以使用JavaFX Properties对象，如果你想绑定等：
You can also do this with JavaFX Properties instead of plain objects, if you want binding etc:
ParentController.java：
ParentController.java:
public class ParentController {
@FXML
private ChildController childController ;
private final ObjectProperty<User> user = new SimpleObjectProperty<>(...) ;
public void initialize() {
user.set(...);
childController.userProperty().bind(user);
}
}
ChildController.java：
ChildController.java:
public class ChildController {
private ObjectProperty<User> user = new SimpleObjectProperty<>();
public ObjectProperty<User> userProperty() {
return user ;
}
}
像往常一样，父fxml文件需要设置在 fx：include 标签上的 fx：id ，以便将加载的控制器注入
As usual, the parent fxml file needs to set the fx:id on the fx:include tag so that the loaded controller is injected to the
<fx:include source="/path/to/child/fxml" fx:id="child" />
规则是 fx：id =x，来自子fxml的控制器将注入到名为 xController 的父控制器字段中。
the rule being that with fx:id="x", the controller from the child fxml will be injected into a parent controller field with name xController.
这篇关于如何从子控制器访问父成员控制器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！