Component({
  properties: {
    gender: {
      type: String,
      value: 'male'
    }
  },

  lifetimes: {
    attached() {
      // 组件初始化时，从本地存储读取性别设置
      const gender = wx.getStorageSync('gender') || 'male';
      this.setData({ gender });
      // 通知页面更新性别
      this.triggerEvent('switch', { gender });
    }
  },

  methods: {
    switchGender(e) {
      const gender = e.currentTarget.dataset.gender;
      // 保存到本地存储
      wx.setStorageSync('gender', gender);
      this.triggerEvent('switch', { gender });
    }
  }
})