调试

components/createPoster/index.js

@@ -24,15 +24,15 @@ Component({
             })
         },
         savePoster() {
-            const query = wx.createSelectorQuery()
-            let canvas
+            const query = wx.createSelectorQuery().in(this);
             query
                 .select('#cavansId')
                 .fields({
                     node: true,
                     size: true
                 }).exec(async (res) => {
-                    canvas = res[0].node;
+                    console.log(res, 'rrr');
+                    let canvas = res[0].node;
                     const ctx = canvas.getContext('2d');
                     canvas.width = 646;
                     canvas.height = 959;
@@ -57,7 +57,7 @@ Component({
                                             })
                                         },
                                         fail(rrr) {
-                                            console.log(rrr,'rrr');
+                                            console.log(rrr, 'rrr');
                                         }
                                     })
                                 },