函式防抖

使用函式節流實現防止使用者多次快速點選後觸發事件。

// 多次點選節流防抖
function debounce(func, wait = 500) {
  let timeout;
  return function (event) {
    clearTimeout(timeout);
    timeout = setTimeout(() => {
      func.call(this, event)
    }, wait);
  };
}

簡訊驗證碼

WXML

  <view class="phone_area"
 
>
    <view class="phone_area_number">
      <view class="phone_area_title">請輸入手機號：</view>
      <input class="phone_area_input" bindinput="bindnumbervalue" maxlength="11">{{phone_number}}</input>
    </view>
    <view class="phone_area_code">
      <
 
view class="phone_area_title">請輸入驗證碼：</view>
      <input class="phone_area_input" bindinput="bindcodevalue" maxlength="4">{{phone_code}}</input>
      <view class="get_code_button" bindtap='verification'>{{phone_code_text}}</view>
    </view>
  </view>

JS

驗證碼倒計時模組，(可能有誤，後續待測試)

Page({
  data: {
    // 手機驗證碼
    phone_number: '', // 手機號
    phone_code_text: '獲取驗證碼',  // 按鈕提示資訊
    phone_code: '', // 驗證碼
    status: true,
  },
  // 手機輸入 
  bindnumbervalue(event){
    this.setData({
      phone_number: event.detail.value
    })
  },
  // 驗證碼功能
  bindcodevalue(event){
    this.setData({
      phone_code: event.detail.value
    })
  },
  // 點選獲取驗證碼  並新增 debounce 節流防抖
  verification: debounce(function(e){
    if((this.data.phone_number).length !== 11){
      wx.showToast({
        title: '請輸入正確的手機號',
        icon: 'none'
      })
      return 
    }
    
    // 此處需要呼叫api介面, 假設返回 code 0 ,成功.  返回其他 return
    
    console.log(this.data.status)
    if (this.data.status === false) {
      return
    }

    var _this = this
    var code_number = 60 // 定義 60 秒的倒計時
    var code_value = setInterval(function () {
      _this.setData({
        phone_code_text: '重新獲取' + (--code_number) + 's',
        status: false
      })
      if (code_number == 0) {
        clearInterval(code_value)
        _this.setData({
          phone_code_text: '獲取驗證碼',
          status: true,
        })
      }
    }, 1000)
  }),
})

wx-if

wx-if 結合 new Date() 實現條件渲染

雙 11 活動資訊彈窗廣告倒計時 background，通過 wx-if 結合 new Date() 實現格式化實現最後三天自行判斷。省去了雙 11 期間重新修改程式碼上傳版本的不必要操作。並且在活動最後一天自動消失，之後再刪除冗餘程式碼重新迭代版本即可。

  onLoad: function () {
    var timeDay = new Date().getDate();
    var timeMonth = new Date().getMonth()
    var timeYear = new Date().getFullYear();

    this.setData({
      timeDay: timeDay,
      timeMonth: timeMonth + 1, 
      timeYear: timeYear,
    });  
  },

<!-- 活動時間 -->
<view wx-if="{{timeYear === 2018 && timeMonth === 11 && timeDay === 9}}" class="newBg" hidden="{{hiddenName}}">
  <image src='https://xxx-xxxxxx.cos.ap-chengdu.myqcloud.com/11bg-3.png'></image>
  <view class="close" catchtap='closeBg'>關閉 {{sec}}</view>
</view>

<view wx-if="{{timeYear === 2018 && timeMonth === 11 && timeDay === 10}}" class="newBg" hidden="{{hiddenName}}">
  <image src='https://xxx-xxxxxx.cos.ap-chengdu.myqcloud.com/11bg-2.png'></image>
  <view class="close" catchtap='closeBg'>關閉 {{sec}}</view>
</view>

<view wx-if="{{timeYear === 2018 && timeMonth === 11 && timeDay === 11}}">
  <image src='https://xxx-xxxxxx.cos.ap-chengdu.myqcloud.com/11bg-1.png'></image>
  <view class="close" catchtap='closeBg'>關閉 {{sec}}</view>
</view>