微信小程序代码片段

Posted on | In

代码片段记录

下拉刷新

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onPullDownRefresh:function() {
    // 监听该页面用户下拉刷新事件
    // 可以在触发时发起请求，请求成功后调用wx.stopPullDownRefresh()来结束下拉刷新
    var that = this;
    console.log('下拉拉拉')
    wx.showNavigationBarLoading();//在当前页面显示导航条加载动画
    //wx.startPullDownRefresh();
    wx.hideNavigationBarLoading();//隐藏导航条加载动画。
    wx.stopPullDownRefresh();//停止当前页面下拉刷新。
    that.setData({
        homeDataList: [],
        pageIndex: 1,
        showEndTxt: false
    })
    common.checkThreeRdSessionTimeOut(that);
},

上拉加载

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//滑动至底部加载更多
onReachBottom:function(e){
    var that = this;
    that.loadMoreModuleData();
},

接口请求

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checkSession:function(){
    var that = this;
    const requestTask = wx.request({
        url: that.globalData.h5Request + 'miniApp/checkSessionTimeOut',
        data: {//请求的参数
            ThreeRdSessionId: wx.getStorageSync('threeRdSessionId')
        },
        success: function (res) {
            wx.hideLoading();
            if(res.data=='1'){
                that.getUserInfo();//获取用户信息
            }else{
                if (getCurrentPages().length != 0) {//重新加载首页
                    getCurrentPages()[getCurrentPages().length - 1].onShow();
                    var e = getCurrentPages()[getCurrentPages().length - 1]
                    if (e.data.reloadData!=undefined && e.data.reloadData != 1) {
                        e.data.reloadData = 0;
                        getCurrentPages()[getCurrentPages().length - 1].loadData()
                    }
                }
            }
        }
    })
    //监听 HTTP Response Header 事件。会比请求完成事件更早
    //lambda表达式用的是 () => {}
    requestTask.onHeadersReceived((res) => {
        console.log("onHeadersReceived", res)
    })
},

接口请求，抽取

app.js中公共数据设置全局的URL前缀

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globalData: {
    userInfo: null,
    isIphonex: false,
    h5Request: 'https://ldyh5.dolphin-free.com/',//上传接口
    supportRequest: 'http://api.nnzhp.cn/' //普通接口
},

自定义请求函数（公用）/utils/request.js

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/**
 * 自定义请求函数
 * @params {String} url 请求路径
 * @params {Object} data 请求数据
 * @params {String} method 请求方式
 * @params {Number} flag 是否缓存token的标志 0:否，1:是
 * 
 */
module.exports = function request(url, data, method, flag = 0, that = getApp()) {
  console.log(url,1111)
  const host = that.globalData.supportRequest
  let token = wx.getStorageSync(that.storageKeys.TOKEN) || ''

  return new Promise((resolve, reject) => {
    wx.showLoading({
      title: '加载中',
    })
    //网络请求
    wx.request({
      url: host + url,
      data: data,
      method: method,
      dataType: 'json',
      header: {
        // 'content-type': 'application/json; charset=UTF-8', // 按json格式请求
        'content-type': 'application/x-www-form-urlencoded; charset=UTF-8',//按表单形式请求
        'Authorization': token
      },
      success: function(res) { //服务器返回数据
        console.log(url)
        console.log(res)
        // console.log(res.header)
        if (flag == 1) { // 更新缓存token
          wx.setStorageSync(that.storageKeys.TOKEN, res.header.Authorization);
        }
        if (res.statusCode == 200) {
          //响应码 0表示成功， <0 表示失败,>0表示警告
          if (res.data.errCode === 0) {
            resolve(res.data.data);
          } else {
            reject(res.data)
          }
        } else if (res.statusCode === 502) {
          wx.showToast({
            title: '服务器更新',
            icon: 'none'
          })
        } else if (res.statusCode === 500) {

          wx.showToast({
            title: res.data.errMsg || "接口异常",
            icon: 'none',
            duration: 1500,
          })
        } else if (res.statusCode === 403) {
          reject(res.data)
        } else { //返回错误提示信息
          setTimeout(() => {
            wx.showToast({
              title: res.data.errMsg || "主人，我出错啦o(╥﹏╥)o",
              icon: 'none',
              duration: 1500,
            })
          }, 500)
          reject(res.data)
        }
        wx.hideLoading()
      },
      fail: function(e) {
        wx.hideLoading();
        console.log(e)
        reject({errMsg:"接口调用失败"})
      },
    })
  })
}

调用：get、post、上传(选文件)、下载

各个页面对应的api js common/api/home-api.js

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const httpRequest = require('../../utils/request')

//get请求
export function getSomething(options) {
  return httpRequest('api/user/stu_info', options, 'GET')
}

//post请求
export function postSomething(options) {
  return httpRequest('api/user/login', options, 'POST')
}

调用的地方 pages/home/home.js

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Page({
    /**
    * 页面的初始数据
    */
    data: {
        login:{
            username:"niuhanyang",
            passwd:"aA123456",
        },
        imgUrl: "https://res.wx.qq.com/wxdoc/dist/assets/img/0.4cb08bb4.jpg",
        //...
    },

    /**
    * get请求数据
    */
    getSomething: function(){
        homeApi.getSomething().then(res =>{
            getApp().toastNone(res)
        }).catch(err => {
            getApp().toastNone(err)
        });
    },
    /**
    * post请求数据
    */
    postSomething: function(){
        let that = this;
        homeApi.postSomething(that.data.login).then(res =>{
            getApp().toastNone(res)
        }).catch(err =>{
            getApp().toastNone(err)
        });
    },


    /**
    * 上传
    */
    gotoShowIdCart: function(e){
        var that = this;
        var dataType = e.currentTarget.dataset.datatype;
        debugger
        wx.chooseImage({
            count: 1, // 最多可以选择的图片张数，默认9
            sizeType: ['original', 'compressed'], // original 原图，compressed 压缩图，默认二者都有
            sourceType: ['album', 'camera'], // album 从相册选图，camera 使用相机，默认二者都有
            success: function (res) {
                wx.showLoading({ title: '上传中', });

                that.setData({
                    isUploadPic: 1
                })
                console.log(res)
                var tempFilePaths = res.tempFilePaths
                wx.saveFile({
                    tempFilePath: tempFilePaths[0],
                    success: function (res) {
                        var savedFilePath = res.savedFilePath
                        wx.uploadFile({
                            url: requesth5 + 'miniApp/uploadLogImg', //仅为示例，非真实的接口地址
                            filePath: savedFilePath,
                            name: 'file',
                            formData: {
                                TmallShopId: that.data.tmallShopId,
                                ThreeRdSessionId: that.data.threeRdSessionId,
                                filePath: savedFilePath, // 要上传文件资源的路径
                            }, // HTTP 请求中其他额外的参数
                            success: function (res) {
                                if (res.statusCode == 200) {
                                    var obj = JSON.parse(res.data);;
                                    // var data = res.data
                                    if (dataType == '1') {
                                        that.setData({
                                            cardPositivePic: obj.picUrl,
                                            hideidcard1: false
                                        })
                                    } else if (dataType == '2') {
                                        that.setData({
                                            cardNativePic: obj.picUrl,
                                            hideidcard2: false
                                        })
                                    }
                                    wx.hideLoading();
                                    that.setData({
                                        isUploadPic: 0
                                    })
                                } else {
                                    that.showToast(res.errMsg);
                                }
                            }
                        })

                    },
                    fail: function () {
                        console.log('fail')
                    }
                })
            },
            fail: function () {

            },
            complete: function () {

            }
        })
    },
    /**
    * 下载
    */
    downUrl(e) {
        let that = this;
        console.log("保存文件")
        console.log(this.data.imgUrl)
        console.log(e)

        if (!this.data.imgUrl) {
            getApp().toastNone("没有相关文件：" + this.data.imgUrl)
            return;
        }

        wx.showLoading({
            title: '正在保存文件'
        })
        let finalSharePosterImg = this.data.imgUrl;
        console.log("保存文件：" + finalSharePosterImg)
        wx.downloadFile({
            url: finalSharePosterImg,
            success(fileinfo) {
                let filePath = fileinfo.tempFilePath;
                console.log("下载成功", fileinfo)
                wx.openDocument({
                    filePath: filePath,
                    success: function(res) {
                        console.log('打开文档成功')
                    },
                    complete: function(coml) {
                        wx.hideLoading()
                    }
                })
                // wx.saveFile({
                //   tempFilePath: filePath,
                //   success: function(res) {
                //     console.log("保存成功",res)
                //     wx.hideLoading()
                //     // wx.showToast({
                //     //   title: '已保存',
                //     // })
                //     that.setData({
                //       showMenu: false
                //     })
                //     console.log(res);
                //   },
                //   fail: function(res) {
                //     console.log(res)
                //     let errMsg = res.errMsg
                //     wx.getSetting({
                //       success(res) {
                //         if (!res.authSetting['scope.writePhotosAlbum']) {
                //           wx.showModal({
                //             title: '警告',
                //             content: '您未授权保存到相册,将无法正常保存文件',
                //             showCancel: false,
                //             success: function(res) {
                //               wx.hideLoading()
                //               if (res.confirm) {
                //                 wx.openSetting({
                //                   success: (res) => {

                //                   }
                //                 })
                //               }
                //             }
                //           })
                //         } else {
                //           wx.hideLoading()
                //           wx.showToast({
                //             title: '保存失败，请刷新重试。',
                //             icon: 'none'
                //           })
                //           that.setData({
                //             showMenu: false
                //           })
                //         }
                //       }
                //     })

                //   }
                // })
            },
            fail(errinfo) {
                wx.hideLoading()
                wx.showToast({
                    title: '获取文件失败，请刷新重试.',
                    icon: 'none'
                })
                that.setData({
                    showMenu: false
                })
            }
        })
    }

})

展示页面（参考）/pages/home/home.wxml

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<!--pages/home/home.wxml-->
<text style="background-color:#ff0000;">网络请求</text>

<view class="font50" catchtap="getSomething">普通get网络请求</view>
<view class="font50" catchtap="postSomething">普通post网络请求</view>

<view class='IdCard_Pic' >
  <!-- 上传前 -->
  <view class='item' wx:if="{{hideidcard1 == true}}" bindtap='gotoShowIdCart' data-dataType='1' name="upImg">
    <view class='mask ud_layout_c2'>
      <icon class='iconfont icon-xiangji'></icon>
      <view class='font10 c999'>身份证正面照片</view>
    </view>
  </view>
  <!-- end上传前 -->
  <!-- 上传后 -->
  <view class='item upload' wx:if="{{hideidcard1 == false}}" bindtap='gotoShowIdCart' data-dataType='1'>
    <view class='mask lr_layout_c'>
      <icon class='iconfont icon-xiangji'></icon>
    </view>
    <image src='{{cardPositivePic}}' mode='aspectFill'></image>

  </view>
  <!-- end上传后 -->
  <!-- 上传前 -->
  <view class='item' wx:if="{{hideidcard2 == true}}" bindtap='gotoShowIdCart' data-dataType='2'>
    <view class='mask ud_layout_c2'>
      <icon class='iconfont icon-xiangji'></icon>
      <view class='font10 c999'>身份证反面照片</view>
    </view>
  </view>
  <!-- end上传前 -->
  <!-- 上传后 -->
  <view class='item upload' wx:if="{{hideidcard2 == false}}" bindtap='gotoShowIdCart' data-dataType='2'>
    <view class='mask lr_layout_c'>
      <icon class='iconfont icon-xiangji'></icon>
    </view>
    <image src='{{cardNativePic}}' mode='aspectFill'></image>
  </view>
  <!-- end上传后 -->

</view>
<view class="font50" catchtap="downUrl">下载</view>

登录

wx.login 登录

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// 重新登录
wx.login({
    success: function (res) {
        var code = res.code;
        if (code) {
            wx.request({
                url: that.globalData.h5Request + 'miniApp/wxLoginNew',
                data: {
                    code: code,
                    threeRdSessionId: wx.getStorageSync('threeRdSessionId'),
                    unionId: wx.getStorageSync('unionid'),
                    easyChannelId: wx.getStorageSync('easyChannelId'), //商户独立绑定小程序改造  by wuwq
                    tmallShopId: wx.getStorageSync('tmallShopId'),
                    miniAppType: 4
                },
                success: function (res) {
                    wx.hideLoading();
                    var data = res.data;
                    if (isNaN(data.error)) {
                        wx.setStorageSync('threeRdSessionId', data.threeRdSessionId);
                        //是否显示加入购物车按钮：1 是 0 否
                        wx.setStorageSync('isShowCart', data.isShowCart);
                        //折扣标签设置：1 显示折扣标签 2显示降价金额 0 不显示
                        wx.setStorageSync('isShowDiscountTag', data.isShowDiscountTag);
                        //裂变小程序appId
                        wx.setStorageSync('marketingMiniAppId', data.marketingMiniAppId);
                        //综合版社交小程序appId
                        wx.setStorageSync('integrateMiniAppId', data.integrateMiniAppId);
                        wx.setStorageSync('miniAppSource', "13");
                        wx.setStorageSync('miniAppType', "4");
                        if (!isNaN(data.unionid) && data.unionid != "") {
                            wx.setStorageSync('unionid', data.unionid);
                        }

                        if (getCurrentPages().length != 0) {//重新加载首页
                            getCurrentPages()[getCurrentPages().length - 1].onShow()
                            var e = getCurrentPages()[getCurrentPages().length - 1]
                            if (e.data.reloadData != undefined && e.data.reloadData != 1) {//首页
                                e.data.reloadData = 0;
                                getCurrentPages()[getCurrentPages().length - 1].loadData()
                            }
                        }
                    }
                }
            })
        } else {
            console.log('获取用户登录态失败！' + res.errMsg)
        }
    }
})

wx.checkSession检查登录态是否过期

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onLoad: function (options) {
    var that = this;
    // 每次进核对页面查一下缓存是否失效
    that.checkSession();
    //...
},
// 每次进页面查一下缓存是否失效
checkSession: function () {
    var that = this;
    wx.request({
        url: h5Request + 'miniApp/checkSessionTimeOut',
        data: {
            ThreeRdSessionId: wx.getStorageSync('threeRdSessionId')
        },
        success: function (res) {
            wx.hideLoading();
            if (res.data == '1') {
                app.getUserInfo();//获取用户信息
            } else {

            }
        }
    })
},

公共js，暴露接口，便于引用；支付

公共js common.js中

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//暴露接口，便于引用
module.exports = {
    weixinPayOrder: weixinPayOrder,
    showToast: showToast
}

//微信支付方法
function weixinPayOrder(tradeId) {
  var threeRdSessionId = wx.getStorageSync("threeRdSessionId");
  wx.request({
    url: h5Request + '/miniApp/wixin/miniAppPayOrder',
    data: {
      ThreeRdSessionId: threeRdSessionId,
      tradeId: tradeId,
      miniAppType: 4,
      easyChannelId: wx.getStorageSync("easyChannelId")
    },
    success: function (res) {
      var ret = res.data.ret;
      var obj = res.data;
      if (ret == '0') {
        wx.requestPayment({
          //相关支付参数
          timeStamp: obj.timeStamp,
          nonceStr: obj.nonceStr,
          'package': 'prepay_id=' + obj.prepay_id,
          signType: obj.signType,
          paySign: obj.paySign,
          //小程序微信支付成功的回调通知
          success: function (res) {
            wx.navigateTo({
              url: '../../package-trade/paySuccess/paySuccess?tradeId=' + tradeId,
            })
          },
          fail: function (res) {
            wx.redirectTo({
              url: '../../package-trade/payOrder/payOrder?tradeId=' + tradeId,
            })
          }
        })
      } else if (ret == 'm_0'){ //支付金额为0
        wx.navigateTo({
          url: '../../package-trade/paySuccess/paySuccess?tradeId=' + tradeId,
        })
      }else {
        wx.redirectTo({
          url: '../../package-trade/payOrder/payOrder?tradeId=' + tradeId,
        })
        //失败
      }
    }
  })
}

//浮层提示
function showToast(that, text) {
  that.setData({
    toastText: text
  });
  setTimeout(function () {
    that.setData({
      toastText: ''
    });
  }, 1000);
}

//调用common.js

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import common= require("../../../resources/js/common.js");

Page({
    /** 页面初始数据 */
    data:{
        
    }
    
    /**微信支付 */
    wechatpay: function () {
        var that = this;
        var storeId = that.data.storeId;
        var tradeId = that.data.tradeId;
        var groupDetailId = that.data.groupDetailId;
        common.showToast(that, "跳转微信支付");
        common.weixinPayOrder(tradeId, groupDetailId); //微信支付
    },
})

跳转到别的小程序

  1. 先在app.json中声明

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    "navigateToMiniProgramAppIdList": [
        "wxc3b9875f7ef24e85",
        "wx30a359ec2fe37327"
    ],

  2. 在页面的js中，创建跳转方法

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    //打开其他指定的小程序
    jumpToOtherMiniApp:function(miniAppType,url) {
        var appid = "";
        if(miniAppType == 3) {//裂变
            appid = "wxc3b9875f7ef24e85";
        }else if(miniAppType == 1) {//购物
            appid = "wx30a359ec2fe37327";
        }else{
            return;
        }
        wx.navigateToMiniProgram({
            appId: appid,
            path: url,
            envVersion: 'release',// 打开正式版
            success(res) {
                // 打开成功
            },
            fail: function (err) {
                console.log(err);
            }
        });
    }

    js中调用跳转方法

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    //跳转购物导航版小程序
    url = "/pages/views/home/home"
    that.jumpToOtherMiniApp(1,url);

设置导航栏

单个导航栏背景色

那个页面的json文件中修改（如/pages/home/home.json）

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{
  "navigationBarBackgroundColor": "#00ffff",
  "usingComponents": {}
}

整个小程序的导航栏背景色

修改app.json中window下的navigationBarBackgroundColor的值

js中动态修改标题名称

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changeRangeType:function (e) {
    var rangeType=e.currentTarget.dataset.rangeType;
    var that=this;
    that.setData({
      nextPageIndex:1,
      isEnd: false,
      rangeType:rangeType,
      list:[]
    })
    this.showAchivementRanking();
    that.showRangeType();
    wx.setNavigationBarTitle({
      title: that.getNavigatoinBarTitleStr(rangeType),
    })
  },
  getNavigatoinBarTitleStr:function(rangeType){
    if (rangeType=='1') {
      return "本月业绩排行"
    } else if (rangeType == '3') {
      return "发展会员数"
    }
    return "本月业绩排行"
  }

缓存

权限

拍照

路由

redirectTo

navigateTo

swtichTab