小程序開發(fā)中如何實(shí)現(xiàn)一個(gè)圖片上傳功能

Page({

 /**
  * 頁面的初始數(shù)據(jù)
  */
 data: {
  pics: [],
  count: 9, //上傳圖片最大數(shù)量
  // showImgUrl: "", //路徑拼接，一般上傳返回的都是文件名，
  uploadImgUrl: 'https://xxx/UploadHandler.ashx', //圖片的上傳的路徑
  detailPics: [], //上傳的結(jié)果圖片集合
 },
 selectimages() {
  var that = this;
  var detailPics = that.data.detailPics;
  if (detailPics.length >= that.data.count) {
   wx.showToast({
    title: '最多選擇' + that.data.count + '張！',
   })
   return;
  }
  wx.chooseImage({
   count: that.data.count, // 最多可以選擇的圖片張數(shù)，默認(rèn)9
   sizeType: ['original', 'compressed'], // original 原圖，compressed 壓縮圖，默認(rèn)二者都有
   sourceType: ['album', 'camera'], // album 從相冊選圖，camera 使用相機(jī)，默認(rèn)二者都有
   success: function(res) {
    var imgs = res.tempFilePaths;
    for (var i = 0; i < imgs.length; i++) {
     that.data.pics.push(imgs[i])
    }
    that.setData({
     pics: that.data.pics
    })
    console.log(that.data.pics)
     that.uploadimg({
     url: that.data.uploadImgUrl, //這里是你圖片上傳的接口
     path: that.data.pics, //這里是選取的圖片的地址數(shù)組
    });
   },
  })
 },
 //多張圖片上傳
 uploadimg: function(data) {
  wx.showLoading({
   title: '上傳圖片中...',
   mask: true,
  })
  var that = this,
   i = data.i &#63; data.i : 0,
   success = data.success &#63; data.success : 0,
   fail = data.fail &#63; data.fail : 0;
  wx.uploadFile({
   url: data.url,
   filePath: data.path[i],
   name: 'fileData',
   formData: null,
   success: (resp) => {
    wx.hideLoading();
    success++;
    var str = resp.data //返回的結(jié)果，可能不同項(xiàng)目結(jié)果不一樣
    var pic = JSON.parse(str);
    var pic_name = pic.url;
    var detailPics = that.data.detailPics;
    detailPics.push(pic_name)
    that.setData({
     detailPics: detailPics
    })
   },
   fail: (res) => {
    fail++;
    console.log('fail:' + i + "fail:" + fail);
   },
   complete: () => {
    i++;
    if (i == data.path.length) { //當(dāng)圖片傳完時(shí)，停止調(diào)用   
     that.send()
     console.log('執(zhí)行完畢');
     console.log('成功：' + success + " 失?。?quot; + fail);
     var myEventDetail = {
      picsList: that.data.detailPics
     } // detail對象，提供給事件監(jiān)聽函數(shù)
     var myEventOption = {} // 觸發(fā)事件的選項(xiàng)
     that.triggerEvent('myevent', myEventDetail, myEventOption) //結(jié)果返回調(diào)用的頁面
    } else { //若圖片還沒有傳完，則繼續(xù)調(diào)用函數(shù)
     data.i = i;
     data.success = success;
     data.fail = fail;
     that.uploadimg(data); //遞歸，回調(diào)自己
    }
   }
  });
 },
})