优化图片上传

utils/utils.js

@@ -44,7 +44,7 @@ function formatTime(date) {
   // 点击按钮触发的事件
   function tapBtn(e, _this, pageType,from,isSmall=false) {
     let btnType = e.target.dataset.type;
-    
+    console.log("btnType: ", btnType)
     let c = {};
   
     switch (btnType) {
@@ -157,14 +157,21 @@ function formatTime(date) {
           success: function (res) {
             // 把单纯用户画的内容存好了
             let src = res.tempFilePath;
+            // getFileSize(src)
+
+            // getFileSize(_this.data.background)
             let ctx = wx.createCanvasContext('myCanvas',_this);
+            // console.log("tempCanvas:", ctx)
+
+            // console.log("_this.data.canvasWidth: ", _this.data.canvasWidth)
+            // console.log("_this.data.canvasHeight: ", _this.data.canvasHeight)
             // 照片
             ctx.drawImage(_this.data.background, 0, 0, _this.data.canvasWidth, _this.data.canvasHeight);
             // 覆盖上画的内容
             ctx.drawImage(src, 0, 0, _this.data.canvasWidth, _this.data.canvasHeight);
             //let that=this
             ctx.draw(false,function(){  
-                _canvaseSaveToImg(_this,from);
+                _canvaseSaveToImg(_this,from,isSmall);
               
             });
   
@@ -172,11 +179,24 @@ function formatTime(date) {
           }
         },_this);
       } else {
-        _canvaseSaveToImg(_this,from);
+        _canvaseSaveToImg(_this,from,isSmall);
       }
    // }
   }
-  
+  // 获取临时文件大小
+  function getFileSize(filePath) {
+    wx.getFileInfo({
+        filePath: filePath,
+        success: (res) => {
+            console.log('文件信息:', res);
+            console.log('文件大小:', res.size/1024);
+        },
+        fail: (err) => {
+            console.error('获取文件信息失败:', err);
+            wx.showToast({ title: '获取文件大小失败', icon: 'none' });
+        }
+    });
+} 
   function _canvaseSaveToImg(_this,from,isSmall) {
       let that=_this;
     console.log(from)
@@ -186,7 +206,7 @@ function formatTime(date) {
     setTimeout(()=>{
         wx.canvasToTempFilePath({
             canvasId: 'myCanvas',
-            fileType:'png',
+            fileType:'jpg',
             quality:isSmall?0.8:1,
             success: function (res) {
             //   wx.previewImage({