修改顶部ui前备份

pages/mytgm/index.js

@@ -158,13 +158,13 @@ Page( {
       })
       var userId = wx.getStorageSync("userId")
       var LoginId = wx.getStorageSync("LoginId")
+      
       wx.canvasToTempFilePath({
         canvasId: "myCanvas"+(that.data.selindex==0?"":(that.data.selindex==1?"0":"1")),
         destWidth: 405,
         destHeight: 720,
         canvas: (that.data.selindex==0?mCanvas:(that.data.selindex==1?mCanvas0:mCanvas1)),
         success: function(res0) {
-          // 获取图片路径
           const tempFilePath = res0.tempFilePath;
           
           wx.saveImageToPhotosAlbum({
@@ -187,17 +187,48 @@ Page( {
                   })
                 }
               })
+            },
+            fail: function(err) {
+              console.log('saveImageToPhotosAlbum fail:', err);
+              if (err.errMsg.indexOf('auth deny') > -1 || err.errMsg.indexOf('authorize') > -1) {
+                wx.showModal({
+                  title: '提示',
+                  content: '需要授权保存到相册权限',
+                  confirmText: '去授权',
+                  success: function (res) {
+                    if (res.confirm) {
+                      wx.openSetting({
+                        success: function(settingRes) {
+                          if (settingRes.authSetting['scope.writePhotosAlbum']) {
+                            that.onsavepic(e);
+                          }
+                        }
+                      })
+                    }
+                  }
+                })
+              } else {
+                wx.showToast({
+                  title: '保存失败：' + err.errMsg,
+                  icon: "none",
+                  duration: 3000
+                })
+              }
+              that.setData({
+                savetitle:"保存二维码到相册"
+              })
             }
           })
-         
-         
-         
         },
         fail: function(err) {
+          console.log('canvasToTempFilePath fail:', err);
           wx.showToast({
-            title:  err,
+            title: '生成图片失败：' + err.errMsg,
             icon: "none",
-            duration: 10000
+            duration: 3000
+          })
+          that.setData({
+            savetitle:"保存二维码到相册"
           })
         }
       })