配置滚动弹幕最大行数显示，没有效果

maxLinesPair.set(BaseDanmaku.TYPE_SCROLL_RL, 2);

配置相关代码

```
// 弹幕初始化配置
  private barrageInit() {
    /// 弹幕视图的size配置 (不配置有默认值)
    this.barrageModel.setWidth(lpx2px(720))
    this.barrageModel.setHeight(lpx2px(720))

let maxLinesPair: Map<number, number> = new Map();
    maxLinesPair.set(BaseDanmaku.TYPE_SCROLL_RL, 2); // 滚动弹幕最大显示5行(就是弹幕轨道的数量) 没效果呢
    // 设置是否禁止重叠
    let overlappingEnablePair: Map<number, boolean> = new Map();
    overlappingEnablePair.set(BaseDanmaku.TYPE_SCROLL_RL, false);  ///滚动的弹幕是否支持重叠 我们要设置为false
    /// 创建弹幕会话对象context
    this.barrageContext = DanmakuContext.create();
    /// 弹幕配置
    this.barrageContext.setDanmakuStyle(DANMAKU_STYLE_STROKEN, 3)
      .setDuplicateMergingEnabled(true)
      .setScrollSpeedFactor(1)
      .setScaleTextSize(1)
      .setMaximumLines(maxLinesPair)
      .preventOverlapping(overlappingEnablePair)
      .setDanmakuMargin(20); ///行间距
    let that = this;
    if (this.barrageModel != null) {
      this.barrageParser = this.createParser();
      this.barrageModel.prepare(this.barrageParser, this.barrageContext);
      /// 设置弹幕事件回调对象 (目前只是在prepare回调中 开始播放弹幕)
      this.barrageModel.setCallback(new AHBarrageCallback(that));
      /// 设置弹幕点击监听对象
      // this.barrageModel.setOnDanmakuClickListener(new OnDanMu(that))
      /// 开始准本渲染 设置解析对象 与context对象 给DanmakuView

/// 配置显示debug用的 屏幕PFS
      // this.barrageModel.showFPS(true);
    }
  }
```

OpenHarmony-SIG/ohos_danmaku_flame_master

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