Simply use the Swift Webview

import UIKit

import WebKit

class MeHelpDetailController: UIViewController {
@IBOutlet weak var webContainerView: UIView!

var url = "http://www.mapway.online:8090/lvtu/web/help/make.html" 

var webView: WKWebView!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
    webView = WKWebView(frame: webContainerView.frame)
    // 下面一行代码意思是充满的意思(一定要加，不然也会显示有问题)
    webView.autoresizingMask = [.flexibleWidth, .flexibleHeight] 

    webContainerView.addSubview(webView)

    let mapwayURL = URL(string: url)!
    let mapwayRequest = URLRequest(url: mapwayURL)
    webView.load(mapwayRequest)
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

}

When Autoresize Subviews then selected, view automatically resizes the subclass, if not checked or can not fully fill out the screen page content

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