iOSUI⼊门——Swift下WKWebView的使⽤
之前有写过Objective-C语法下WKWebView的使⽤，基本包含了界⾯和与h5的交互，这⾥主要写Swift语法下WKWebView的使⽤。直接
上代码吧，说明基本都在注释⾥。
import UIKit
import WebKit
class ViewController: UIViewController,WKUIDelegate,WKNavigationDelegate,WKScriptMessageHandler{
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.view.backgroundColor = UIColor.white
self.setupWebView()
}
func setupWebView() {
self.view.addSubview(self.webView)
}
//MARK:-WKUIDelegate
func webView(_ webView: WKWebView, runJavaScriptAlertPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo, completionHand // 在JS端调⽤alert函数时，会触发此代理⽅法。
// JS端调⽤alert时所传的数据可以通过message拿到
// 在原⽣得到结果后，需要回调JS，是通过completionHandler回调
let alertView = UIAlertController.init(title: "提⽰", message: message, preferredStyle: UIAlertControllerS
tyle.alert)
let okAction = UIAlertAction.init(title: "确定", style: UIAlertActionStyle.destructive) { (action:UIAlertAction) in
//确定
completionHandler()
}
alertView.addAction(okAction)
}
func webView(_ webView: WKWebView, runJavaScriptConfirmPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo, completionH // JS端调⽤confirm函数时，会触发此⽅法
// 通过message可以拿到JS端所传的数据
// 在iOS端显⽰原⽣alert得到YES/NO后
// 通过completionHandler回调给JS端
let alertView = UIAlertController.init(title: "提⽰", message:message, preferredStyle: UIAlertControllerStyle.alert)
let cancelAction = UIAlertAction.init(title: "取消", style: UIAlertActionStyle.cancel) { (action:UIAlertAction) in
//取消
completionHandler(false)
}
alertView.addAction(cancelAction)
let okAction = UIAlertAction.init(title: "确定", style: UIAlertActionStyle.default) { (action:UIAlertAction) in
//确定
completionHandler(true)
}
alertView.addAction(okAction)
self.present(alertView, animated: true, completion: nil)
}
func webView(_ webView: WKWebView, runJavaScriptTextInputPanelWithPrompt prompt: String, defaultText: String?, initiatedByFrame frame: WKFrame // JS端调⽤prompt函数时，会触发此⽅法
// 要求输⼊⼀段⽂本
// 在原⽣输⼊得到⽂本内容后，通过completionHandler回调给JS
let alertTextField = UIAlertController.init(title: "请输⼊", message: "JS调⽤输⼊框", preferredStyle: UIAlertControllerStyle.alert)        alertTextField.addTextField { (textField:UITextField) in
//设置textField相关属性
}
let okAction = UIAlertAction.init(title: "确定", style: UIAlertActionStyle.destructive) { (action:UIAlertAction) in
//确定
//确定
Fields?.last?.text)
}
alertTextField.addAction(okAction)
self.present(alertTextField, animated: true, completion: nil)
}
view ui框架//MARK:-WKNavigationDelegate
func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
//页⾯开始加载，可在这⾥给⽤户loading提⽰
}
func webView(_ webView: WKWebView, didCommit navigation: WKNavigation!) {
//内容开始到达时
}
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
//页⾯加载完成时
}
func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
//页⾯加载出错，可在这⾥给⽤户错误提⽰
}
func webView(_ webView: WKWebView, didReceiveServerRedirectForProvisionalNavigation navigation: WKNavigation!) { //收到服务器重定向请求
}
func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy // 在请求开始加载之前调⽤，决定是否跳转
decisionHandler(WKNavigationActionPolicy.allow)
}
func webView(_ webView: WKWebView, decidePolicyFor navigationResponse: WKNavigationResponse, decisionHandler: @escaping (WKNavigationRes //在收到响应开始加载后，决定是否跳转
decisionHandler(WKNavigationResponsePolicy.allow)
}
//MARK:-WKScriptMessageHandler
func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) { //h5给端传值的内容，可在这⾥实现h5与原⽣的交互时间
let messageDic = message.body
print(messageDic)
}
//MARK:-lazy
lazy var webView: WKWebView = {
let myWebView = WKWebView.init(frame: self.view.frame)
let web_url = URL.init(string: "www.baidu")
myWebView.load(URLRequest.init(url: web_url!))
myWebView.navigationDelegate = self
myWebView.uiDelegate = self
return myWebView
}()
lazy var webConfiguration: WKWebViewConfiguration = {
let configuration = WKWebViewConfiguration.init()
let preferences = WKPreferences.init()
preferences.javaScriptCanOpenWindowsAutomatically = true
configuration.preferences = preferences
configuration.userContentController = self.webUserContentController
return configuration
}()
lazy var webUserContentController: WKUserContentController = {
lazy var webUserContentController: WKUserContentController = { let userConetentController = WKUserContentController.init()        userConetentController.add(self, name: "webViewApp") return userConetentController
}()
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。