udid拷贝后传出给app. Review by 硬币。

@@ -176,7 +176,7 @@ static NSString * const kYohoBuyUdid = @"com.yoho.buy.udid";
         shareUdidString = [NSString stringWithString:udidString];
         shareUdidString = [NSString stringWithString:udidString];
         
         
     });
     });
-    return shareUdidString;
+    return [shareUdidString copy];
 }
 }
 
 
 + (NSString*) valueWithError:(NSError **)error {
 + (NSString*) valueWithError:(NSError **)error {