Angular CDK :Getting error for FlexibleConnectedPositionStrategy in Overlay config

Question

我想为overlay.position().flexibleConnectedTo() 配置一个覆盖，因为connectedTo() 已根据official docs 被弃用.
否则有 quesstion对 connectedTo() 有一个很好的回答


这是我的代码

    const origin:FlexibleConnectedPositionStrategyOrigin=this.RefElem;
    const overlayConfig = new OverlayConfig();
    overlayConfig.positionStrategy = this.overlay.position().flexibleConnectedTo(origin);
    const overlayRef = this.overlay.create(overlayConfig);
    const userProfilePortal = new ComponentPortal(
      GraphMetaSignalSelectorComponent
    );
    overlayRef.attach(userProfilePortal);

但收到此错误:
“ConnectedToFlexibleConnectedPositionStrategy:至少需要一个位置。在 FlexibleConnectedPositionStrategy.push”

Answer 1

对于那些因为缺乏 this.getPositions() 的实现而坚持接受的答案的好奇者，这是复制粘贴的快速示例:

const positionStrategy = this.overlay.position()
      .flexibleConnectedTo(origin)
      .withPositions([{
        // here, top-left of the overlay is connected to bottom-left of the origin; 
        // of course, you can change this object or generate it dynamically;
        // moreover, you can specify multiple objects in this array for CDK to find the most suitable option
        originX: 'start',
        originY: 'bottom',
        overlayX: 'start',
        overlayY: 'top'
      } as ConnectedPosition])
      .withPush(false); // or true, if you want to push the overlay into the screen when it doesn't fit