InfoWindow类可以通过设置content纹理资源、position位置点以及yOffset偏移值，实现信息框覆盖物的创建。

可通过ArkUI获取PixelMap，赋值给InfoWindow实现信息框。

@Builder
function RandomBuilder(a:string,b:string) {
    Flex({ direction: FlexDirection.Column, justifyContent: FlexAlign.Center, alignItems: ItemAlign.Center }) {
        Text('Test menu item ' + a)
            .fontSize(20)
            .width(100)
            .height(50)
            .textAlign(TextAlign.Center)
        Divider().color('#00ff00').height(10)
        Text('Test menu item ' + b)
            .fontSize(20)
            .width(100)
            .height(50)
            .textAlign(TextAlign.Center)
    }
    .width(100)
    .height(100)
    .backgroundColor('#ff88')
    .borderRadius(10)
    .id("builder")
}

componentSnapshot.createFromBuilder(()=>{RandomBuilder.bind(this)('ONE','TWO')})
    .then((pixmap: image.PixelMap) => {
        let info = componentUtils.getRectangleById("builder")
        let infoWin = this.infoWin = new InfoWindow({
            anchorX: 0.5,
            anchorY: 0,
            content: new ImageEntity(pixmap,info.size.width,info.size.height)
        })
        infoWin.addEventListener(OverlayEvent.CLICK,()=>{
            promptAction.showToast({
                message: '信息框点击',
                duration: 2000,
            });
        });
        this.marker?.setInfoWindow(infoWin);
    }).catch((err:Error) => {
    console.log("error: " + err)
})

通过直接使用图片纹理的形式赋值给InfoWindow实现信息框。

let info2 = new InfoWindow({
    position: new LatLng(39.914835, 116.413119),
    content: new ImageEntity('rawfile://info.png'),
    isPerspective: false,
    yOffset: -49
});
info2.addEventListener(OverlayEvent.CLICK,()=>{
    promptAction.showToast({
        message: '信息框点击',
        duration: 2000,
    });
});
this.mapController?.addOverlay(info2);