? ????? ??? ???? ???? ? ? ?? ???? ??? ?? ?? ????? ?? ? ?? ????. WeChat ???? ?? ??? ???? ???? ??? ???? ? ? ?? ???? ????? ????. ???? ??? ? ???!

? ??? ? ?????. ?? ?? ????? ??? ? ??? ?? ??? ? ??? ???? ?? ????. ?? ?? ??? ? ?? ?? ????? ?? ??????, ??? ?? ????. ??? ??? ??? ???.

?? ?? ???:

?? ????? ?? ???? ?????.

1??: ?? WeChat ??? ?? ???? ?? ??? ??? ????. ????? ?? ??? ??? ?? ????. -definition. ?? ? ???? ???? ?? ????? ?? ??? ???? ???? ???.

 getUserProfile(e) {
    console.log(e)
    let that = this;
    wx.getUserProfile({
      desc: '僅用于生成頭像使用',
      success: (res) => {
        var url = res.userInfo.avatarUrl;
        while (!isNaN(parseInt(url.substring(url.length - 1, url.length)))) {
          url = url.substring(0, url.length - 1)
        }
        url = url.substring(0, url.length - 1) + "/0";
        res.userInfo.avatarUrl = url;
        console.log(JSON.stringify(res.userInfo));
        that.setData({
          userInfo: res.userInfo,
          hasUserInfo: true
        })
        that.drawImg();
      }
    });
  },

2??: ??? ?? 1???? ?? ?? ??? ??? ???? ?? ??? ??? ?, ?? ????? cavas ????? ??? ?????.

drawImg() {
    let that = this;
    wx.showLoading({
      title: '生成頭像中...',
    })
    let promise1 = new Promise(function (resolve, reject) {
      wx.getImageInfo({
        src: that.data.userInfo.avatarUrl,
        success: function (res) {
          resolve(res);
        }
      })
    });
    var mask_id = that.data.now_mask;
    let promise2 = new Promise(function (resolve, reject) {
      wx.getImageInfo({
        src: `../../assets/img/mask0${mask_id}.png`,
        success: function (res) {
          console.log(res)
          resolve(res);
        }
      })
    });
    Promise.all([
      promise1, promise2
    ]).then(res => {
      console.log(res)
      var windowWidth = wx.getSystemInfoSync().windowWidth
      var context = wx.createCanvasContext('myAvatar');
      var size = windowWidth /750 * 500
      // var size = 500
      context.drawImage(res[0].path, 0, 0, size, size);
      context.draw(true)
      context.save();
      context.drawImage('../../'+res[1].path, 0, 0, size, size);
      context.draw(true)
      context.save();

    })
    wx.hideLoading()
  },

3??: ??? ??? ?? ??? ???????.

canvasToTempFile(){
    if(!this.data.userInfo){
      wx.showModal({
        title: '溫馨提示',
        content: '請先點擊上方獲取微信頭像',
        showCancel: false,
      })
      return
    }
    var windowWidth = wx.getSystemInfoSync().windowWidth
    var size = 500
    // var dpr = 750 / windowWidth
    wx.canvasToTempFilePath({
      x: 0,
      y: 0,
      height: size,
      width: size,
      canvasId: 'myAvatar',
      success: (res) => {
        wx.saveImageToPhotosAlbum({
          filePath: res.tempFilePath,
          success: result => {
            wx.hideLoading();
            wx.showModal({
              content: '圖片已保存到相冊,請前往微信去設置喲!',
              showCancel: false,
              success: function(res) {
                if (res.confirm) {
                  console.log('用戶點擊確定');
                }
              }
            })
          }, fail(e) {
            wx.hideLoading();
            console.log("err:" + e);
          }
        })
      }
    });
  },

??? ?? ?? ??? ?????.

????? ?? ???? ??? ????. ??? ??? ???? ??? ? ????.

????? ?? ????? ?? ?????: https://github.com/hackun666/new-year- ??

?? ??? ? ?? ????, ??? ??? ??? ????? ????!

???? : https://juejin.cn/post/7057807283463389191

??? : hackun

[?? ?? ?? : ?? ???? ?? ????]

? ??? ??? ? ? ??? ?? ???? ???? ?? ?? ????? ??? ???.? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!