#鸿蒙通关秘籍#如何在BuilderNode中注入触摸事件？

可以通过postTouchEvent方法向BuilderNode组件注入触摸事件，实现事件模拟和转发。例如，将一次触摸事件从一个组件传递给BuilderNode管理的组件。

import { NodeController, BuilderNode, FrameNode, UIContext } from '@kit.ArkUI';

class Params {
  text: string = "this is a text"
}

@Builder
function ButtonBuilder(params: Params) {
  Column() {
    Button(`button ` + params.text)
      .borderWidth(2)
      .backgroundColor(Color.Orange)
      .width("100%")
      .height("100%")
      .gesture(
        TapGesture()
          .onAction((event: GestureEvent) => {
            console.log("TapGesture");
          })
      )
  }
  .width(500)
  .height(300)
  .backgroundColor(Color.Gray)
}

class MyNodeController extends NodeController {
  private rootNode: BuilderNode<[Params]> | null = null;
  private wrapBuilder: WrappedBuilder<[Params]> = wrapBuilder(ButtonBuilder);

  makeNode(uiContext: UIContext): FrameNode | null {
    this.rootNode = new BuilderNode(uiContext);
    this.rootNode.build(this.wrapBuilder, { text: "this is a string" })
    return this.rootNode.getFrameNode();
  }

  postTouchEvent(touchEvent: TouchEvent): void {
    if (this.rootNode == null) {
      return;
    }
    let result = this.rootNode.postTouchEvent(touchEvent);
    console.log("result " + result);
  }
}

@Entry
@Component
struct MyComponent {
  private nodeController: MyNodeController = new MyNodeController();

  build() {
    Column() {
      NodeContainer(this.nodeController)
        .height(300)
        .width(500)
      Column()
        .width(500)
        .height(300)
        .backgroundColor(Color.Pink)
        .onTouch((event) => {
          if (event != undefined) {
            this.nodeController.postTouchEvent(event);
          }
        })
    }
  }
}