IOS Uiwebview does not load the url
<p>I am new in IOS developing app. I would like to load an url via UIwebview. Here is my code</p>

<pre><code>NSString *uniqueIdentifier = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
NSString *fullURL = [@"http://abc.efg.com/imei/ios-" stringByAppendingString:uniqueIdentifier];
NSURL *url = [NSURL URLWithString:fullURL];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[_viewWeb loadRequest:requestObj];
</code></pre>

<p>The above code does not load url. The white background shows instead.
Did anything wrong? Please suggest </p>