<button type="primary" size="default" bindtap="preload">开始预加载</button>
<button type="primary" size="default" bindtap="abort">中断预加载</button>
<text>{{logs}}</text>
<video tt:if="{{show}}" autoplay="{{true}}" src="{{src}}"></video>

Page({
  data: {
    src: "https//sf1-cdn-tos.douyinstatic.com/obj/microapp/frontend/misc/test-upload.mp4",
    logs: "",
    show: false,
  },
  preload() {
    this.setData({
      logs: "开始预加载\n",
    });
    this.task = tt.preloadVideo({
      src: this.data.src,
      success: () => {
        this.setData({
          logs: this.data.logs + "预加载成功\n",
          show: true,
        });
      },
      fail: (error) => {
        console.log("预加载失败", error);
        this.setData({
          logs: this.data.logs + "预加载失败: " + error.errMsg,
        });
      },
    });
    this.abort();
  },
  abort() {
    if (this.task) {
      this.task.abort();
    }
  },
});