本文实例为大家分享了swift版webview加载网页展示的具体代码，供大家参考，具体内容如下
比较简单，直接上代码
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import UIKitimport WebKitimport SnapKitclass CMWebVC:UIViewController, WKNavigationDelegate { var webUrl: String? var webView: WKWebView =WKWebView() var progressView:UIProgressView = UIProgressView() var closeBtn: UIButton! override func initVC() { webView.addObserver(self, forKeyPath:"estimatedProgress", options: NSKeyValueObservingOptions.new, context:nil) webView.navigationDelegate =self } deinit { webView.removeObserver(self, forKeyPath:"estimatedProgress") webView.navigationDelegate =nil } override func viewDidLoad() { super.viewDidLoad() // webview view.addSubview(webView) webView.snp.makeConstraints { (make)in make.width.height.equalToSuperview() } // progressview view.addSubview(progressView) progressView.snp.makeConstraints { (make)in make.width.equalToSuperview() make.height.equalTo(3) make.top.equalToSuperview() } progressView.tintColor =UIColor.ColorBgTheme() progressView.isHidden =true // load url if webUrl !=nil { webView.load(URLRequest(url:URL(string: webUrl!)!)) } // shear self.showRightItem(image:"nav_share") { } } override func viewWillAppear(_ animated:Bool) { super.viewWillAppear(animated) self.closeButton() } override func viewWillDisappear(_ animated:Bool) { self.closeBtn.removeFromSuperview() } func closeButton() { if self.closeBtn ==nil { self.closeBtn =UIButton(frame: CGRect(x:44, y: 0, width:44, height: 44)) self.closeBtn.setTitle("关闭", for: .normal) self.closeBtn.setTitleColor(UIColor.black, for: .normal) self.closeBtn.addAction({ (button)in self.navigationController!.popViewController(animated:true) }) self.navigationController?.navigationBar.addSubview(self.closeBtn) } } override func observeValue(forKeyPath keyPath:String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) { // 加载进度 if keyPath == "estimatedProgress" { let newprogress = change?[.newKey]!as! Float let oldprogress = change?[.oldKey]as? Float ??0.0 //不要让进度条倒着走...有时候goback会出现这种情况 if newprogress < oldprogress { return } if newprogress == 1 { progressView.isHidden =true progressView.setProgress(0, animated:false) } else { progressView.isHidden =false progressView.setProgress(newprogress, animated:true) } } } func webView(_ webView:WKWebView, didFinish navigation: WKNavigation!) { progressView.isHidden =true progressView.setProgress(0, animated:false) } func webView(_ webView:WKWebView, didFail navigation: WKNavigation!, withError error: Error) { progressView.isHidden =true progressView.setProgress(0, animated:false) } override func navigateBack() { if webView.canGoBack { webView.goBack() } else { super.navigateBack() } }} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://blog.csdn.net/tiantianios/article/details/78474778
