8.18 网络控件 UIWebView

cordova / phoneGap 这两个是同一个东西，开发网页用的，可以用html
w3school.com.cn 感兴趣的可以自己去看看，学习JS的网站

import UIKit

class ViewController: UIViewController, UIWebViewDelegate {

    override func viewDidLoad() {

        super.viewDidLoad()

        

        //混合开发

        let webView = UIWebView(frame: self.view.bounds)
        webView.delegate = self
        
//        let url = NSURL(string: "http://ifeng.com")

//        let request = NSURLRequest(URL: url!)

//        webView.loadRequest(request)

        

//        let htmlStr = "<h1>这是一个标题</h1>"

//        webView.loadHTMLString(htmlStr, baseURL: nil)

        

        //1. 加载本地网页

        let url = NSBundle.mainBundle().URLForResource("index", withExtension: "html")

//        let request = NSURLRequest(URL: url!)

//        webView.loadRequest(request)
        
        //2. 

        let data = NSData(contentsOfURL: url!)
        webView.loadData(data!, MIMEType: "text/html", textEncodingName: "utf-8", baseURL: NSURL())
        self.view.addSubview(webView)
    }

    //1. 开始加载的时机
    //2. 可以过滤网址

    func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
        let path = request.URL?.absoluteString
        print(path!)
        if path!.containsString("baidu.com") {
            return false
        }
        return true
    }
    
    func webViewDidStartLoad(webView: UIWebView) {
       
    }

    

    func webViewDidFinishLoad(webView: UIWebView) {
        //如果需要操作网页，必须等加载完成
        let res = webView.stringByEvaluatingJavaScriptFromString("document.getElementsByTagName('img')")
        print(res)
    }

    func webView(webView: UIWebView, didFailLoadWithError error: NSError?) {        
    }
}