Page({
  data: {
    role: "teacher",
    historyList: [
      {
        image: 'https://img1.baidu.com/it/u=2052658756,3021621759&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
        title: '趣味识字卡片',
        date: '2023-10-15 14:30',
        checked: false
      },
      {
        image: 'https://img1.baidu.com/it/u=2052658756,3021621759&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
        title: '趣味识字卡片',
        date: '2023-10-15 14:30',
        checked: false
      },
      {
        image: 'https://img1.baidu.com/it/u=2052658756,3021621759&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
        title: '趣味识字卡片',
        date: '2023-10-15 14:30',
        checked: false
      },
      {
        image: 'https://img1.baidu.com/it/u=2052658756,3021621759&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
        title: '趣味识字卡片',
        date: '2023-10-15 14:30',
        checked: false
      },
      {
        image: 'https://img1.baidu.com/it/u=2052658756,3021621759&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
        title: '趣味识字卡片',
        date: '2023-10-15 14:30',
        checked: false
      },
      {
        image: 'https://img1.baidu.com/it/u=2052658756,3021621759&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
        title: '趣味识字卡片',
        date: '2023-10-15 14:30',
        checked: false
      },
      {
        image: 'https://img1.baidu.com/it/u=2052658756,3021621759&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
        title: '趣味识字卡片',
        date: '2023-10-15 14:30',
        checked: false
      },
      {
        image: 'https://img1.baidu.com/it/u=2052658756,3021621759&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
        title: '趣味识字卡片',
        date: '2023-10-15 14:30',
        checked: false
      },
      {
        image: 'https://img1.baidu.com/it/u=2052658756,3021621759&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
        title: '趣味识字卡片',
        date: '2023-10-15 14:30',
        checked: false
      },
      {
        image: 'https://img1.baidu.com/it/u=2052658756,3021621759&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
        title: '趣味识字卡片',
        date: '2023-10-15 14:30',
        checked: false
      },
      {
        image: 'https://img1.baidu.com/it/u=2052658756,3021621759&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
        title: '趣味识字卡片',
        date: '2023-10-15 14:30',
        checked: false
      },
      {
        image: 'https://img1.baidu.com/it/u=2052658756,3021621759&fm=253&fmt=auto&app=120&f=JPEG?w=500&h=500',
        title: '趣味识字卡片',
        date: '2023-10-15 14:30',
        checked: false
      },
      // 其他列表项...
    ],
    isManaging: false
  },

  onLoad(options) {
    // 页面加载时的初始化操作
  },

  onReachBottom() {
    // 上拉触底事件的处理函数
    this.loadMore();
  },

  loadMore() {
    // 加载更多数据的逻辑
    console.log('加载更多');
  },

  toggleManageMode() {
    const { isManaging, historyList } = this.data;
    if (isManaging) {
      if (historyList && historyList.length > 0) {
        historyList.forEach(item => item.checked = false);
      }
      this.setData({ isManaging: false });
    } else {
      this.setData({ isManaging: true });
    }
  },

  selectAll() {
    const { historyList } = this.data;
    if (historyList && historyList.length > 0) {
      const allChecked = historyList.every(item => item.checked);
      historyList.forEach(item => item.checked = !allChecked);
      this.setData({ historyList });
    }
  },

  deleteItems() {
    const { historyList } = this.data;
    if (historyList && historyList.length > 0) {
      const newList = historyList.filter(item => !item.checked);
      this.setData({ historyList: newList });
    }
  }
});