【微信小程序-原生开发】实用教程10 - 动态的新增、修改、删除（含微信云数据库的新增、修改、删除，表单弹窗、确认弹窗、日期选择器、单行输入框、多行输入框、滑动组件的使用）

      wx.cloud.database().collection('message').add({
        data: this.data.formData
      }).then

      let id = this.data.currentID
      let newData = this.data.formData
      // 删除多余的表单字段
      delete newData._openid
      delete newData._id
      wx.cloud.database().collection('message').doc(id).update({
        data: newData
      }).then

    let id = this.data.currentID
    wx.cloud.database().collection('message').doc(id).remove().
    then

"t-fab": "tdesign-miniprogram/fab/fab",

<!-- 悬浮按钮--新增 -->
<t-fab style="right: 40rpx;bottom: 140rpx" icon="add" capture-bind:tap="add" />

  // 新增
  add: function () {
    this.setData({
      formData: {}, // 清空表单数据
      formDialogVisible: true, // 显示表单弹窗
      formTitle: '新增' + this.data.currentLabel, // 更新表单弹窗的标题
      action: 'add' // 标记当前执行的操作是 新增 add
    })
  },

    "t-button": "tdesign-miniprogram/button/button",
    "t-input": "tdesign-miniprogram/input/input",
    "t-dialog": "tdesign-miniprogram/dialog/dialog",
    "t-textarea": "tdesign-miniprogram/textarea/textarea",
    "t-date-time-picker": "tdesign-miniprogram/date-time-picker/date-time-picker",

<!-- 弹窗--表单 -->
<t-dialog visible="{{formDialogVisible}}" title="{{formTitle}}" confirm-btn="保存" cancel-btn="取消" bind:confirm="save" bind:cancel="closeFormDialog">

  <t-input bind:clear='inputChange' bindchange="inputChange" data-prop='title' value="{{formData.title}}" style="{{style}}" clearable slot="content" placeholder="标题" />

  <t-textarea adjust-position bindchange="inputChange" data-prop='content' value="{{formData.content}}" bordered maxcharacter="200" disableDefaultPadding="{{true}}" indicator t-class="external-class" slot="content" placeholder="内容" />

  <t-input bind:clear='inputChange' bindchange="inputChange" data-prop='publisher' value="{{formData.publisher}}" style="{{style}}" clearable slot="content" placeholder="发布人" />

  <t-input disabled capture-bind:tap="showDatePicker" data-prop='date' value="{{formData.date}}" style="{{style}}" slot="content" placeholder="日期" />
</t-dialog>

<!-- 日期选择器 -->
<t-date-time-picker data-prop='date' title="选择日期" visible="{{dateVisible}}" mode="date" defaultValue="{{today}}" value="{{formData.date}}" format="YYYY-MM-DD" bindchange="chooseDate" bindcancel="hideDatePicker" />

/* 表单弹窗--多行输入框 */
.external-class {
  height: 256rpx;
  margin-top: 40rpx;
}

/* 表单弹窗--被禁用的日期输入框,强制黑色 */
.t-input__control--disabled {
  color: black !important
}

    // 执行的操作
    action: '',
    // 表单弹窗的标题
    formTitle: '',
    // 表单弹窗的显隐
    formDialogVisible: false,
    // 日期选择器的显隐
    dateVisible: false,
    // 日期选择器的默认值
    today: new Date().getTime(),
    // 表单数据
    formData: {},
    // 表单字段--用于表单校验
    formConfig: {
      title: "标题",
      content: "内容",
      publisher: "发布人",
      date: "日期",
    },
    // 表单输入框的样式
    style: 'border: 2rpx solid rgba(220,220,220,1);border-radius: 12rpx;margin-top:40rpx',

  // 输入内容改变时，触发数据同步改变--实现表单数据的双向绑定
  inputChange: function (e) {
    let prop = e.currentTarget.dataset.prop
    let value = e.detail.value
    this.data.formData[prop] = value
    this.setData({
      formData: this.data.formData
    })
  },
  // 显示日期选择器
  showDatePicker() {
    this.setData({
      dateVisible: true,
    });
  },
  // 隐藏日期选择器
  hideDatePicker() {
    this.setData({
      dateVisible: false,
    });
  },
  // 选择日期
  chooseDate(e) {
    let prop = e.currentTarget.dataset.prop
    let value = e.detail.value
    this.data.formData[prop] = value
    this.setData({
      formData: this.data.formData
    })
    this.hideDatePicker();
  },
  // 表单校验
  formValid: function () {
    let result = true
    let obj = this.data.formConfig
    obj[Symbol.iterator] = function* () {
      let keys = Object.keys(obj);
      for (let k of keys) {
        yield [k, obj[k]];
      }
    };

    for (let [k, v] of obj) {
      if (!this.data.formData[k]) {
        this.warning(v)
        result = false
        break
      }
    }
    return result
  },
  // 提示--不能为空
  warning: function (label) {
    wx.showToast({
      icon: 'none',
      title: `${label}不能为空`,
    })
  },
  // 保存 （新增+修改）
  save: function () {
    if (!this.formValid()) {
      return
    }
    let action = this.data.action
    if (action === 'add') {
      wx.cloud.database().collection('message').add({
        data: this.data.formData
      }).then(
        res => {
          wx.showToast({
            title: '新增成功',
          })
          this.getinfoList()
          this.closeFormDialog()
        }
      )
    }

    if (action === 'edit') {
      let id = this.data.currentID
      let newData = this.data.formData
      // 删除多余的表单字段
      delete newData._openid
      delete newData._id
      wx.cloud.database().collection('message').doc(id).update({
        data: newData
      }).then(
        res => {
          this.actionOK()
        }
      )
    }
  },
  // 操作成功(新增/修改)
  actionOK: function () {
    let actionDic = {
      add: "新增",
      edit: "修改",
      del: "删除"
    }
    let actionLabel = actionDic[this.data.action]
    wx.showToast({
      title: `${actionLabel}成功`,
    })
    this.getinfoList()
    this.closeFormDialog()
  },
  // 隐藏表单弹窗
  closeFormDialog: function () {
    this.setData({
      formDialogVisible: false
    })
  },

"t-swipe-cell": "tdesign-miniprogram/swipe-cell/swipe-cell"

    <t-step-item wx:for="{{infoList}}" wx:key="index" title="{{item.date}}">
      <!-- 插槽 extra -- 自定义每个步骤中的内容 -->
      <t-swipe-cell slot="extra">
        <!-- 通过自定义属性 data-id 实现事件传参 -->
        <view class="contentBox" bindtap="gotoDetail" data-id="{{item._id}}">
          <view>
            {{item.title}}
          </view>
          <view>
            {{item.publisher}}
          </view>
        </view>
        <view slot="right" class="btn-wrapper">
          <view class="btn edit-btn" bind:tap="edit" data-detail="{{item}}">修改</view>
          <view class="btn delete-btn" bind:tap="del" data-id="{{item._id}}">删除</view>
        </view>
      </t-swipe-cell>
    </t-step-item>

/* 修改、删除按钮 */
.btn-wrapper {
  height: 100%;
  padding-left: 30rpx;
}

/* 按钮通用样式 */
.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 120rpx;
  height: 100%;
  color: white;
}

/* 删除按钮 */
.delete-btn {
  background-color: #e34d59;
}

/* 修改按钮 */
.edit-btn {
  background-color: #ed7b2f;
}

    // 当前操作数据的 id
    currentID: '',

  // 修改
  edit: function (e) {
    this.setData({
      formDialogVisible: true, // 显示表单弹窗
      currentID: e.currentTarget.dataset.detail._id, // 获取操作数据的id
      formData: e.currentTarget.dataset.detail, // 将操作的数据赋值给表单
      formTitle: '修改' + this.data.currentLabel, // 更新表单弹窗标题
      action: 'edit' // 标记执行的操作为修改 edit
    })
  },

<!-- 弹窗--删除确认 -->
<t-dialog visible="{{showDelConfirm}}" content="确定删除吗？" confirm-btn="确定" cancel-btn="取消" bind:confirm="delConfirm" bind:cancel="delCancel" />

    // 删除确认弹窗的显隐
    showDelConfirm: false,

  // 删除
  del: function (e) {
    this.setData({
      currentID: e.currentTarget.dataset.id, // 获取操作数据的id
      showDelConfirm: true,  // 显示删除确认弹窗
      action: 'del' // 标记执行的操作为删除 del
    })
  },
  // 确定删除
  delConfirm: function () {
    let id = this.data.currentID
    wx.cloud.database().collection('message').doc(id).remove().
    then(
      res => {
        this.actionOK()
        this.setData({
          showDelConfirm: false
        })
      }
    )
  },
  // 取消删除
  delCancel: function () {
    this.setData({
      showDelConfirm: false
    })
  },