在HarmonyOS NEXT开发中如何获取控件的组件标识属性？

Question

在HarmonyOS NEXT开发中如何获取控件的组件标识属性？

Answer 1

可以通过getInspectorByKey9+getInspectorByKey(id: string): string来获取指定id的组件的所有属性，不包括子组件信息。参考示例代码如下：

// xxx.ets 
import { IntentionCode } from '@ohos.multimodalInput.intentionCode' 
 
class Utils { 
  static rect_left: number 
  static rect_top: number 
  static rect_right: number 
  static rect_bottom: number 
  static rect_value: Record<string, number> 
 
  //获取组件所占矩形区域坐标 
  static getComponentRect(key:string):Record<string, number> { 
    let strJson = getInspectorByKey(key) 
    let obj:Record<string, string> = JSON.parse(strJson) 
    console.info("[getInspectorByKey] current component obj is: " + JSON.stringify(obj)) 
    let rectInfo:string[] = JSON.parse('[' + obj.$rect + ']') 
    console.info("[getInspectorByKey] rectInfo is: " + rectInfo) 
    Utils.rect_left = JSON.parse('[' + rectInfo[0] + ']')[0] 
    Utils.rect_top = JSON.parse('[' + rectInfo[0] + ']')[1] 
    Utils.rect_right = JSON.parse('[' + rectInfo[1] + ']')[0] 
    Utils.rect_bottom = JSON.parse('[' + rectInfo[1] + ']')[1] 
    return Utils.rect_value = { 
      "left": Utils.rect_left, "top": Utils.rect_top, "right": Utils.rect_right, "bottom": Utils.rect_bottom 
    } 
  } 
} 
 
@Entry 
@Component 
struct IdExample { 
  @State text: string = '' 
 
  build() { 
    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) { 
 
      Button() { 
        Text('onKeyTab').fontSize(25).fontWeight(FontWeight.Bold) 
      }.margin({ top: 20 }).backgroundColor('#0D9FFB') 
      .onKeyEvent(() => { 
        this.text = "onKeyTab" 
      }) 
 
      Button() { 
        Text('click to start').fontSize(25).fontWeight(FontWeight.Bold) 
      }.margin({ top: 20 }) 
      .onClick(() => { 
        console.info(getInspectorByKey("click")) 
        console.info(JSON.stringify(getInspectorTree())) 
        this.text = "Button 'click to start' is clicked" 
        setTimeout(() => { 
          sendEventByKey("longClick", 11, "") // 向id为"longClick"的组件发送长按事件 
        }, 2000) 
      }).id('click') 
 
      Button() { 
        Text('longClick').fontSize(25).fontWeight(FontWeight.Bold) 
      }.margin({ top: 20 }).backgroundColor('#0D9FFB') 
      .gesture( 
        LongPressGesture().onActionEnd(() => { 
          console.info('long clicked') 
          this.text = "Button 'longClick' is longclicked" 
          setTimeout(() => { 
            let rect = Utils.getComponentRect('onTouch') // 获取id为"onTouch"组件的矩形区域坐标 
            let touchPoint: TouchObject = { 
              id: 1, 
              type: TouchType.Down, 
              x: rect.left + (rect.right - rect.left) / 2, // 相对于组件左上角的水平方向坐标 
              y: rect.top + (rect.bottom - rect.top) / 2, // 相对于组件左上角的垂直方向坐标 
              screenX: rect.left + (rect.right - rect.left) / 2, // 相对于应用窗口左上角的水平方向坐标，API10已废弃，采用windowX替代 
              screenY: rect.left + (rect.right - rect.left) / 2, // 相对于应用窗口左上角的垂直方向坐标，API10已废弃，采用windowY替代 
              windowX: rect.left + (rect.right - rect.left) / 2, // 相对于应用窗口左上角的水平方向坐标 
              windowY: rect.left + (rect.right - rect.left) / 2, // 相对于应用窗口左上角的垂直方向坐标 
              displayX: rect.left + (rect.right - rect.left) / 2, // 相对于设备屏幕左上角的水平方向坐标 
              displayY: rect.left + (rect.right - rect.left) / 2, // 相对于设备屏幕左上角的垂直方向坐标 
            } 
            sendTouchEvent(touchPoint) // 发送触摸事件 
            touchPoint.type = TouchType.Up 
            sendTouchEvent(touchPoint) // 发送触摸事件 
          }, 2000) 
        })).id('longClick') 
 
      Button() { 
        Text('onTouch').fontSize(25).fontWeight(FontWeight.Bold) 
      }.type(ButtonType.Capsule).margin({ top: 20 }) 
      .onClick(() => { 
        console.info('onTouch is clicked') 
        this.text = "Button 'onTouch' is clicked" 
        setTimeout(() => { 
          let rect = Utils.getComponentRect('onMouse') // 获取id为"onMouse"组件的矩形区域坐标 
          let mouseEvent: MouseEvent = { 
            button: MouseButton.Left, 
            action: MouseAction.Press, 
            x: rect.left + (rect.right - rect.left) / 2, // 相对于组件左上角的水平方向坐标 
            y: rect.top + (rect.bottom - rect.top) / 2, // 相对于组件左上角的垂直方向坐标 
            screenX: rect.left + (rect.right - rect.left) / 2, // 相对于应用窗口左上角的水平方向坐标，API10已废弃，采用windowX替代 
            screenY: rect.left + (rect.right - rect.left) / 2, // 相对于应用窗口左上角的垂直方向坐标，API10已废弃，采用windowY替代 
            windowX: rect.left + (rect.right - rect.left) / 2, // 相对于应用窗口左上角的水平方向坐标 
            windowY: rect.left + (rect.right - rect.left) / 2, // 相对于应用窗口左上角的垂直方向坐标 
            displayX: rect.left + (rect.right - rect.left) / 2, // 相对于设备屏幕左上角的水平方向坐标 
            displayY: rect.left + (rect.right - rect.left) / 2, // 相对于设备屏幕左上角的垂直方向坐标 
            stopPropagation: () => { 
            }, 
            timestamp: 1, 
            target: { 
              area: { 
                width: 1, 
                height: 1, 
                position: { 
                  x: 1, 
                  y: 1 
                }, 
                globalPosition: { 
                  x: 1, 
                  y: 1 
                } 
              } 
            }, 
            source: SourceType.Mouse, 
            pressure: 1, 
            tiltX: 1, 
            tiltY: 1, 
            sourceTool: SourceTool.Unknown 
          } 
          sendMouseEvent(mouseEvent) // 发送鼠标事件 
        }, 2000) 
      }).id('onTouch') 
 
      Button() { 
        Text('onMouse').fontSize(25).fontWeight(FontWeight.Bold) 
      }.margin({ top: 20 }).backgroundColor('#0D9FFB') 
      .onMouse(() => { 
        console.info('onMouse') 
        this.text = "Button 'onMouse' in onMouse" 
        setTimeout(() => { 
          let keyEvent: KeyEvent = { 
            type: KeyType.Down, 
            keyCode: 2049, 
            keyText: 'tab', 
            keySource: 4, 
            deviceId: 0, 
            metaKey: 0, 
            timestamp: 0, 
            stopPropagation: () => { 
            }, 
            intentionCode: IntentionCode.INTENTION_DOWN 
          } 
          sendKeyEvent(keyEvent) // 发送按键事件 
        }, 2000) 
      }).id('onMouse') 
 
      Text(this.text).fontSize(25).padding(15) 
    } 
    .width('100%').height('100%') 
  } 
}