18xchat/assets/Scripts/chat18x/ui/components/DialogBubble.ts

import { _decorator, Component, Label, Node, Size, UITransform } from "cc";
import Tools from "../../utils/tools";
const { ccclass, property } = _decorator;

@ccclass("DialogBubble")
export class DialogBubble extends Component {
  @property(UITransform)
  bg: UITransform = null;
  @property(Label)
  content: Label = null;
  @property(UITransform)
  contentT: UITransform = null;

  updateBubbleContent(str: string, callback?: (actualHeight: number) => void) {
    // 设置文本内容
    this.content.string = str;

    // 计算最大宽度（估算）
    const lines = str.split("\n");
    let maxWidth = 0;

    for (const line of lines) {
      let lineWidth = 0;
      if (Tools.IsChinese(line)) {
        lineWidth = 35 * line.length;
      } else {
        lineWidth = 21 * line.length;
      }
      maxWidth = Math.max(maxWidth, lineWidth);
    }

    // 限制最大宽度
    const contentWidth = Math.min(maxWidth, 950);

    // 设置内容区域宽度，让Label自动计算高度
    this.contentT.setContentSize(new Size(contentWidth, 0));
    this.bg.setContentSize(new Size(contentWidth + 20, 0));

    // 强制更新Label的渲染数据以获取正确的高度
    this.content.updateRenderData(true);

    // 等待一帧后获取Label的实际高度
    this.scheduleOnce(() => {
      const actualHeight =
        this.content.node.getComponent(UITransform).contentSize.height;

      // 更新内容区域的实际大小
      this.contentT.setContentSize(new Size(contentWidth, actualHeight));

      // 根据内容大小调整背景大小，添加适当的内边距
      const bgHeight = actualHeight + 20;
      this.bg.setContentSize(new Size(contentWidth + 50, bgHeight));
      
      // 回调通知实际高度
      if (callback) {
        callback(bgHeight);
      }
    }, 0);

    // 返回预估的背景高度（用于同步计算）
    const estimatedHeight = Math.max(lines.length * 35 + 20, 60); // 最小高度60
    return estimatedHeight;
  }
}