UIWebView links open in Safari if the URL doesn't match a certain pattern

gistfile1.txt

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
    if ( navigationType == UIWebViewNavigationTypeLinkClicked ) {
        NSString *urlString = request.URL.absoluteString;
        // Set the pattern to search the request URL for
        NSRange range = [urlString rangeOfString:@"mobile.example.com"];
        if (range.location != NSNotFound) {
            NSLog(@"%s", "This link matches the pattern and will be loaded in-app within the UIWebView.");
            return YES;
        } else {
            NSLog(@"%s", "This link does NOT match the pattern and will be loaded in Safari.");
            [[UIApplication sharedApplication] openURL:[request URL]];
            return NO;
        }
    }
    return YES;
}

// Documentation: https://developer.apple.com/library/ios/documentation/uikit/reference/UIWebViewDelegate_Protocol/Reference/Reference.html#jumpTo_4

Note: This should be placed in your ViewController file.