diff --git a/dsbridge/DWKWebView.m b/dsbridge/DWKWebView.m
index 2e54d3c..2e48e74 100644
--- a/dsbridge/DWKWebView.m
+++ b/dsbridge/DWKWebView.m
@@ -294,20 +294,26 @@ -(NSString *)call:(NSString*) method :(NSString*) argStr
                             del=[@"delete window." stringByAppendingString:cb];
                         }
                         NSString*js=[NSString stringWithFormat:@"try {%@(JSON.parse(decodeURIComponent(\"%@\")).data);%@; } catch(e){};",cb,(value == nil) ? @"" : value,del];
-                        __strong typeof(self) strongSelf = weakSelf;
-                        @synchronized(self)
-                        {
-                            UInt64  t=[[NSDate date] timeIntervalSince1970]*1000;
-                            jsCache=[jsCache stringByAppendingString:js];
-                            if(t-lastCallTime<50){
-                                if(!isPending){
-                                    [strongSelf evalJavascript:50];
-                                    isPending=true;
+                        dispatch_async(dispatch_get_main_queue(), ^{
+                            //__strong typeof(self) strongSelf = weakSelf;
+                            if (weakSelf != nil) {
+                                NSLog(@"evaluateJavaScript%@",js);
+                                @synchronized(weakSelf)
+                                {
+    //                                UInt64  t=[[NSDate date] timeIntervalSince1970]*1000;
+    //                                jsCache=[jsCache stringByAppendingString:js];
+    //                                if(t-lastCallTime<50){
+    //                                    if(!isPending){
+    //                                        [strongSelf evalJavascript:50];
+    //                                        isPending=true;
+    //                                    }
+    //                                }else{
+    //                                    [strongSelf evalJavascript:0];
+    //                                }
+                                    [weakSelf evaluateJavaScript:js completionHandler:nil];
                                 }
-                            }else{
-                                [strongSelf evalJavascript:0];
                             }
-                        }
+                        });
                         
                     };