PhonicsGame_master/pages/about/share.js

import common from '../../utils/util';
import server from '../../utils/main';

const app = getApp();
var imageIndex = 0;
var arrBuildImageSource = [];
var arrBuildImageTarget = [];

Page({
  data: {
  },
  onLoad: function (options) {
    this.setData({
      Height: common.getSystemHeight(),
    });
  },
  onUnload: function () {
    wx.setStorageSync("IsShare", true);
  },
  buildShareImage: function () {
    imageIndex = 0;
    arrBuildImageSource = [];
    for (var i = 2; i < 6; i++)
      arrBuildImageSource.push("../../images/programsystem_screenshot_pic0" + i + ".png");
    arrBuildImageTarget = [];

    this.buildImage();
  },
  buildImage: function () {
    var that = this;
    var ctx = wx.createCanvasContext("MyCanvas", this);
    ctx.drawImage(arrBuildImageSource[imageIndex], 0, 0, 400, 300);
    var avatar = wx.getStorageSync("Avatar");
    if (avatar) {
      ctx.drawImage(avatar, 15, 250, 40, 40);
      ctx.drawImage("../../images/universalpic_mask_face_size01.png", 13, 248, 44, 44);

      ctx.fillStyle = "#ffffff";
      ctx.setFontSize(14);
      ctx.fillText(app.globalData.userInfo.NickName, 65, 264);
    }
    ctx.draw(true, function (n) {
      wx.canvasToTempFilePath({
        x: 0,
        y: 0,
        width: 400,
        height: 300,
        canvasId: 'MyCanvas',
        success: function (res2) {
          console.log(res2.tempFilePath);

          arrBuildImageTarget.push(res2.tempFilePath);

          if (arrBuildImageTarget.length < arrBuildImageSource.length) {
            imageIndex++;
            that.buildImage();
          }
          else {
            wx.previewImage({
              current: arrBuildImageTarget[0], // 当前显示图片的http链接
              urls: arrBuildImageTarget // 需要预览的图片http链接列表
            });
          }
        }
      })
    });

  },
  onShareAppMessage: function () {
    return {
      title: app.globalData.ShareTitle,
      path: 'pages/index/index?UserID=' + app.globalData.userInfo.UserID,
      imageUrl: app.globalData.ShareImageUrl,
    }
  },
});