add 用cordova.version判断cordova是否注入成功 review by daiqiang

@@ -259,8 +259,18 @@ static float kprogressViewRadius = 2.0f;
 - (BOOL)injectJavascript:(NSString *)resource {
     NSString *jsPath = [[NSBundle mainBundle] pathForResource:resource ofType:@"js"];
     NSString *js = [NSString stringWithContentsOfFile:jsPath encoding:NSUTF8StringEncoding error:NULL];
+    [self.webView stringByEvaluatingJavaScriptFromString:js];
     
-    return ([self.webView stringByEvaluatingJavaScriptFromString:js] != nil);
+
+    //用cordova.version判断cordova是否注入成功
+    NSString* jsCordovaVersion = [NSString stringWithFormat:
+                        @"cordova.version"];
+    NSString* res = [self.webView stringByEvaluatingJavaScriptFromString:jsCordovaVersion];
+    
+    if (res != nil && res.length > 0) {
+        return TRUE;
+    }
+    return FALSE;
 }
 
 /**