UIWebVIew(不支援ios10及其以上的版本)

import UIKit

class FourViewController: UIViewController,UIWebViewDelegate {
    //內部瀏覽器（webview）
    @IBOutlet var webview1: UIWebView!
    //網址輸入框
    @IBOutlet var textFile1: UITextField!
    override func viewDidLoad() {
        super.viewDidLoad()
        //設定webview控制元件的 Delegate 的監聽
 

        webview1.delegate=self
        //開啟一個外部的網頁
        webview1.loadRequest(NSURLRequest(url: NSURL(string: "http://hao123.com")! as URL) as URLRequest)
        // Do any additional setup after loading the view.
    }
    //返回
    @IBAction func backButClick(_ sender: UIButton) {
        webview1.goBack()
    }
    //前進
 

    @IBAction func toButClick(_ sender: UIButton) {
        webview1.goForward()
    }
    //重新整理
    @IBAction func reloadButClick(_ sender: UIButton) {
        webview1.reload()
    }
    //載入
    @IBAction func goButClick(_ sender: UIButton) {
        let text_url = textFile1.text
        webview1.loadRequest(NSURLRequest(url: NSURL(string
 
: text_url!)! as URL) as URLRequest)
    }

    //網頁開始載入監聽
    func webViewDidStartLoad(_ webView: UIWebView) {
        print("開始載入")
    }
    //網頁結束載入監聽
    func webViewDidFinishLoad(_ webView: UIWebView) {
        print("結束載入")
    }

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

}

WKWebView(支援ios8以上的系統,比UIWebView效能更加的優化,用法跟UIWebView用法差不多)

import UIKit
import WebKit //引入該包

class WebViewController: UIViewController {
    //輸入網址的文字輸入框
    @IBOutlet var textfile1: UITextField!
    //瀏覽器控制元件
    @IBOutlet var webview2: WKWebView!
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }
    //重新整理
    @IBAction func refreshClick(_ sender: AnyObject) {
        webview2.reload()
    }

    //前進
    @IBAction func toClick(_ sender: AnyObject) {
        webview2.goForward()
    }
    //後退
    @IBAction func backClick(_ sender:  AnyObject) {
        webview2.goBack()
    }
    //搜尋
    @IBAction func searchClick(_ sender: AnyObject) {
        let urls = textfile1.text
       // print(urls)
        webview2.load(NSURLRequest(url: NSURL(string: urls!)! as URL)as URLRequest)
    }
    //文字輸入框輸入完成後觸發的事件
    @IBAction func textEndOnExit(_ sender: AnyObject) {
        //隱藏鍵盤(讓文字框失去焦點)
        textfile1.resignFirstResponder()
    }
    //點選空白處讓鍵盤消失(這個事件要將 View改為UIControl)
    @IBAction func touchUpInside(_ sender: UIControl) {
        //隱藏鍵盤(讓文字框失去焦點)
        textfile1.resignFirstResponder()
    }

    //觸控事件，當一個或多個手指離開螢幕時觸發(當手指離開輸入框後鍵盤消失)
    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        //隱藏鍵盤(讓文字框失去焦點)
        textfile1.resignFirstResponder()
    }

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

}

將 View改為UIControl

點選View在右邊將 class改為UIControl