Create a UIWebView instance

let webview = UIWebView(frame: CGRect(x: 0, y: 0, width: 320, height: 480))

UIWebView *webview = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];

//Alternative way of defining frame for UIWebView
UIWebView *webview = [[UIWebView alloc] init];
CGRect webviewFrame = webview.frame;
webviewFrame.size.width = 320;
webviewFrame.size.height = 480;
webviewFrame.origin.x = 0;
webviewFrame.origin.y = 0;
webview.frame = webviewFrame;