修复bug

src/_core.js

@@ -30,7 +30,7 @@ function config(config) {
     return _readyPromise;
   }
   _readyPromise = Promise.resolve().then(() => {
-    return initWxJssdk().catch(err => {
+    initWxJssdk().catch(err => {
       printDebug('init wx jssdk failed:', err && err.message ? err.message : err);
     });
   }).then(() => {

src/services/provider/scan.js

@@ -71,8 +71,12 @@ function __fallbackScanAfterWxFailure(err) {
   if (!isScanning()) {
     throw err;
   }
-  printWarn("wx scan unavailable, fallback to web/image scan:", err);
-  return __startNonBridgeScan(err);
+  if (__isScanCancel(err)) {
+    return { cancel: 1 };
+  }
+  printWarn("wx scan failed:", err);
+  __scanError(err, { source: "wx" });
+  return err;
 }
 
 function __startNonBridgeScan(err) {
@@ -164,6 +168,22 @@ function __shouldSkipBeep(meta) {
   return source === "scanner" || source === "bridge" || source === "wx";
 }
 
+function __isScanCancel(raw) {
+  if (!raw) {
+    return false;
+  }
+  if (raw.cancel) {
+    return true;
+  }
+  const message = normalizeScanError(raw);
+  if (!message) {
+    return false;
+  }
+  const lowerMessage = message.toLowerCase();
+  return lowerMessage.indexOf("cancel") !== -1
+    || message.indexOf("取消") !== -1;
+}
+
 function __result(result, meta) {
   result = parseBarcodeString(result);
   forwardEmbedScanResultIfNeeded(result, meta);
@@ -397,6 +417,9 @@ function __startWxScan() {
     if (!isScanning()) {
       return resp;
     }
+    if (__isScanCancel(resp)) {
+      return { cancel: 1 };
+    }
     if (resp && resp.error && !resp.result) {
       throw resp.error;
     }
@@ -417,6 +440,9 @@ function __startWxScan() {
       }
       return err;
     }
+    if (__isScanCancel(err)) {
+      return { cancel: 1 };
+    }
     return __fallbackScanAfterWxFailure(err);
   });
 }

src/services/wx/index.js

@@ -206,6 +206,17 @@ function getWxScanErrorMessage(err) {
     return errorMsg;
 }
 
+function isWxScanCancel(err) {
+    if (!err) {
+        return false;
+    }
+    const errMsg = typeof err === "string" ? err : err.errMsg;
+    if (!errMsg) {
+        return false;
+    }
+    return String(errMsg).toLowerCase().indexOf("cancel") !== -1;
+}
+
 function startScanForWxMiniProgram(options) {
     return new Promise(resolve => {
         const wx = getWx();
@@ -231,6 +242,12 @@ function startScanForWxMiniProgram(options) {
                 });
             },
             fail: err => {
+                if (isWxScanCancel(err)) {
+                    resolve({
+                        cancel: 1
+                    });
+                    return;
+                }
                 resolve({
                     success: false,
                     error: getWxScanErrorMessage(err)
@@ -267,11 +284,16 @@ export function startScanForWx(options) {
                 },
                 cancel: () => {
                     resolve({
-                        success: false,
-                        error: "用户取消扫码"
+                        cancel: 1
                     });
                 },
                 fail: err => {
+                    if (isWxScanCancel(err)) {
+                        resolve({
+                            cancel: 1
+                        });
+                        return;
+                    }
                     reject(err);
                 }
             });