优化++

src/_core.js

@@ -1,12 +1,19 @@
 import './polyfill';
 import {
   supportList,
-  onScanListener, offScanListener, setStatusListener, getStatus,
-  startScan, stopScan, scanVideo, scanImage, clear
+  onScanListener, offScanListener,
+  onScanErrorListener, offScanErrorListener,
+  setStatusListener, getStatus,
+  startScan, stopScan, scanImage, scanImageFromFile, clear
 } from './services/provider/scan';
 import { setConfig, getVersion } from './services/config';
 import { initWxJssdk } from './services/wx';
-import { printDebug } from './utils/logger';
+import {
+  isSupportWebScan,
+  prepareWebScanBarcodeDetector,
+  isSupportImageScan
+} from './services/web';
+import { printDebug, printWarn } from './utils/logger';
 
 let _readyPromise = null;
 let _calledReady = false;
@@ -23,18 +30,25 @@ function config(config) {
     return _readyPromise;
   }
   _readyPromise = Promise.resolve().then(() => {
+    return initWxJssdk().catch(err => {
+      printDebug('init wx jssdk failed:', err && err.message ? err.message : err);
+    });
+  }).then(() => {
     printDebug('-------------------------------------');
     printDebug('sdk_version:', getVersion());
     printDebug('support_list:', supportList.map(item => item.name + ':' + item.support).join(', '));
     printDebug('-------------------------------------');
-    initWxJssdk();
-    return Promise.resolve().then(() => {
-      _calledReady = true;
-    }).catch(err => {
-      _readyPromise = null;
-      throw err;
-    });
-  })
+    if (isSupportWebScan() || isSupportImageScan()) {
+      return prepareWebScanBarcodeDetector().catch(err => {
+        printWarn('prepare barcode detector failed:', err);
+      });
+    }
+  }).then(() => {
+    _calledReady = true;
+  }).catch(err => {
+    _readyPromise = null;
+    throw err;
+  });
   return _readyPromise;
 }
 
@@ -42,11 +56,13 @@ export default Object.assign({}, {
   config,
   onScanListener,
   offScanListener,
+  onScanErrorListener,
+  offScanErrorListener,
   setStatusListener,
   getStatus,
   startScan,
   stopScan,
-  scanVideo,
   scanImage,
+  scanImageFromFile,
   clear,
 });