微信小程式開發相關記錄（2017.07.25）

1、底部的tabBar

可設定的屬性有color、selectedColor、borderStyle、backgroundColor、list至少2個，最多5個（其屬性有pagePath、text、iconPath、selectedIconPath等）

"tabBar": {
    "color":"#dddddd",
    "selectedColor":"#3cc51f",
    "borderStyle":"black",
    "backgroundColor":"#2B2B2B",
    "list": [
      {
        "pagePath": "pages/movie/movie",
        "text": "影院熱映",
        "iconPath": "assets/img/dy-1.png",
        "selectedIconPath": "assets/img/dy.png"
      },
      {
        "pagePath": "pages/recommend/recommend",
        "text": "電影推薦",
        "iconPath": "assets/img/tj-1.png",
        "selectedIconPath": "assets/img/tj.png"
      },
      {
        "pagePath": "pages/search/search",
        "text": "查詢電影",
        "iconPath": "assets/img/search-1.png",
        "selectedIconPath": "assets/img/search.png"
      }
    ]
  },

2、滑塊檢視容器swiper

swiper

滑塊檢視容器。

從公共庫v1.4.0開始，change事件返回detail中包含一個source欄位，表示導致變更的原因，可能值如下：

• autoplay 自動播放導致swiper變化；
• touch 使用者划動引起swiper變化；
• 其他原因將用空字串表示。

注意：其中只可放置<swiper-item/>元件，否則會導致未定義的行為。

swiper-item

僅可放置在<swiper/>元件中，寬高自動設定為100%。

示例程式碼：

<swiper indicator-dots="{{indicatorDots}}"
  autoplay="{{autoplay}}" interval="{{interval}}" duration="{{duration}}">
  <block wx:for="{{imgUrls}}">
    <swiper-item>
      <image src="{{item}}" class="slide-image" width="355" height="150"/>
    </swiper-item>
  </block>
</swiper>
<button bindtap="changeIndicatorDots"> indicator-dots </button>
<button bindtap="changeAutoplay"> autoplay </button>
<slider bindchange="intervalChange" show-value min="500" max="2000"/> interval
<slider bindchange="durationChange" show-value min="1000" max="10000"/> duration

Page({
  data: {
    imgUrls: [
      'http://img02.tooopen.com/images/20150928/tooopen_sy_143912755726.jpg',
      'http://img06.tooopen.com/images/20160818/tooopen_sy_175866434296.jpg',
      'http://img06.tooopen.com/images/20160818/tooopen_sy_175833047715.jpg'
    ],
    indicatorDots: false,
    autoplay: false,
    interval: 5000,
    duration: 1000
  },
  changeIndicatorDots: function(e) {
    this.setData({
      indicatorDots: !this.data.indicatorDots
    })
  },
  changeAutoplay: function(e) {
    this.setData({
      autoplay: !this.data.autoplay
    })
  },
  intervalChange: function(e) {
    this.setData({
      interval: e.detail.value
    })
  },
  durationChange: function(e) {
    this.setData({
      duration: e.detail.value
    })
  }
})

效果如下圖所示：

3、豆瓣API

在瀏覽器中輸入豆瓣電影介面地址

http://api.douban.com/v2/movie/in_theaters

然後F12，開啟除錯視窗，選擇Console，輸入var a=介面返回的json串，如下圖所示：

然後回車，再輸入a，再回車，即可看到已經格式化的JSON物件，如下圖所示：

3、從介面獲取資料進行繫結

<block wx:for="{{movies}}">
    <view class="movie">
      <view class="pic">
        <image mode="aspectFit" src="{{item.images.medium}}"></image>
      </view>
      <view class="movie-info">
        <view class="base-info">
          <text>{{item.text}}</text>
        </view>
      </view>
    </view>
    <view class="hr"></view>
  </block>

// pages/movie/movie.js
Page({

  /**
   * 頁面的初始資料
   */
  data: {
    imgUrls: [
      '../../assets/img/001.jpg',
      '../../assets/img/002.jpg',
      '../../assets/img/003.jpg'
    ],
    indicatorDots: true,
    autoplay: true,
    interval: 3000,
    duration: 1000,
    movies:[],
    hidden:false
  },

  /**
   * 生命週期函式--監聽頁面載入
   */
  onLoad: function (options) {
      this.loadMovie();
  },

  /**
   * 生命週期函式--監聽頁面初次渲染完成
   */
  onReady: function () {

  },

  /**
   * 生命週期函式--監聽頁面顯示
   */
  onShow: function () {

  },

  /**
   * 生命週期函式--監聽頁面隱藏
   */
  onHide: function () {

  },

  /**
   * 生命週期函式--監聽頁面解除安裝
   */
  onUnload: function () {

  },

  /**
   * 頁面相關事件處理函式--監聽使用者下拉動作
   */
  onPullDownRefresh: function () {

  },

  /**
   * 頁面上拉觸底事件的處理函式
   */
  onReachBottom: function () {

  },

  /**
   * 使用者點選右上角分享
   */
  onShareAppMessage: function () {

  },
  /**
   * 載入電影
   */
  loadMovie:function(){
    var page = this;
    wx.request({
      url: 'http://api.douban.com/v2/movie/in_theaters',
      header:{
        'Content-Type':"application/json"
      },
      success:function(res){
      var subjects = res.data.subjects;
      processSubjects(subjects);
      page.setData({ movies: subjects, hidden:true});
      }
    })
  },
  /**
   * 
   */
  processSubjects: function (subjects) {
      //迴圈
    for (var i = 0; i < subjects.length;i++){
      var subject = subjects[i];
      this.processSubject(subject);
      }
  },
  /**
   * 
   */
  processSubject:function(subject){
      //名稱
      var title = subject.title;
      //導演
      var directors  = subject.directors;
      var directorStr = "";
      for (var index in directors){
        directorStr= directorStr+directors[index].name+" / ";
      }
      if(directorStr!=""){
        directorStr = directorStr.substring(0,directorStr.length-2);
      }
      //主演
      var casts = subject.casts;
      var castStr = "";
      for(var index in casts){
        castStr= castStr+casts[index].name+" / ";
      }
      if(castStr!=""){
        castStr= castStr.substring(0,castStr.length-2);
      }
      //型別
      var genres = subject.genres;
      var genresStr = "";
      for(var index in genres){
        genresStr = genresStr+genres[index]+" / ";
      }
      if(genresStr!=""){
        genresStr= genresStr.substring(0,genresStr.length-2);
      }
      //年份
      var year = subject.year;
      //拼接字串
      var text = "名稱："+title+"\n導演："+directorStr+"\n主演："+castStr+"\n型別："+genresStr+"\n上映年份:"+year;
      subject.text = text;
  }

})

4、載入進度條

<view class="body-view">
  <loading hidden="{{hidden}}" bindchange="loadingChange">
    載入中...
  </loading>
</view>

data: {
    imgUrls: [
      '../../assets/img/001.jpg',
      '../../assets/img/002.jpg',
      '../../assets/img/003.jpg'
    ],
    indicatorDots: true,
    autoplay: true,
    interval: 3000,
    duration: 1000,
    movies:[],
    hidden:false
  },

/**
   * 載入電影
   */
  loadMovie:function(){
    var page = this;
    wx.request({
      url: 'https://api.douban.com/v2/movie/in_theaters',
      header:{
        'Content-Type':"application/json"
      },
      success:function(res){
      var subjects = res.data.subjects;
      processSubjects(subjects);
      page.setData({ movies: subjects, hidden:true});
      }
    })
  },

• 解決方案：開啟小程式微信公眾平臺設定小程式開發設定，配置伺服器合法域名（必須是https），如下圖所示：