title: Variable definition inside switch-case
body: <pre><code>#pragma mark AlertView delegate
  - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
      NSUserDefaults *userdefault=[NSUserDefaults standardUserDefaults];
  
      switch (buttonIndex) {
          case 0:
              UIWebView *webview = [[UIWebView alloc]initWithFrame:CGRectMake(0, 0, 1024,768)];
              NSString * URLString =@"http://www.google.com";
              NSURL *URL = [NSURL URLWithString: URLString];
              NSURLRequest *request=[NSURLRequest requestWithURL:URL];
              [webview loadRequest:request]; // Use of undeclared identifier webview
              [self.view addSubview:webview]; // Use of undeclared identifier webview
              break;
          case 1:
              //if Yes button pressed on logout alert
              [self notificationAction];
              [userdefault removeObjectForKey:@"Login"];
              [userdefault synchronize];
              break;
          default:
              break;
      }
  }
  </code></pre>
  
  <p>This is the code I am using to display a webpage. However in Xcode I get the following error on the 1st line of 1st case:</p>
  
  <pre><code>Expected Expression
  </code></pre>
  
  <p>Am I missing a header file that I'm suppose to import or am I doing something wrong?</p>