1.WKUIDelegate,WKNavigationDelegate,WKScriptMessageHandler
2.
// 創建一個webiview的配置項
WKWebViewConfiguration *configuretion = [[WKWebViewConfiguration alloc] init];
// Webview的偏好設置
//.WKPreferences()
// 設置偏好設置
configuretion.preferences = [[WKPreferences alloc]init];
configuretion.preferences.minimumFontSize = 10;
configuretion.preferences.javaScriptEnabled = true;
configuretion.processPool = [[WKProcessPool alloc]init];
// 通過js與webview內容交互配置
configuretion.userContentController = [[WKUserContentController alloc] init];
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
//OC注冊供JS調用的方法
[ configuretion.userContentController addScriptMessageHandler:self name:@"WKOcOrAndroidModel"];
// 默認是不能通過JS自動打開窗口的，必須通過用戶交互才能打開
configuretion.preferences.javaScriptCanOpenWindowsAutomatically = NO;
_wkwebView = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:configuretion];//self.view.bounds
[_wkwebView goBack];
[_wkwebView goForward];
_wkwebView.navigationDelegate = self;
_wkwebView.UIDelegate = self;
NSURL *url = [NSURL URLWithString:urlStr]; //測試本地H5
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[_wkwebView loadRequest:request];
3.
/*
*開始加載WKWebView時調用的方法
*/
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation { // 類似UIWebView的 -webViewDidStartLoad:
NSLog(@"didStartProvisionalNavigation");
[self.view showLoading];
}
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation {
NSLog(@"didCommitNavigation");
}
/*
*結束加載WKWebView時調用的方法
*/
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation { // 類似 UIWebView 的 －webViewDidFinishLoad:
NSLog(@"+++++++didFinishNavigation");
[self.view hideLoading];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
dispatch_async(dispatch_get_main_queue(), ^{
if (_wkwebView.title.length > 0) {
self.title = _wkwebView.title;
}
});
});
}
/*
*加載WKWebView失敗時調用的方法
*/
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation withError:(NSError *)error {
// 類似 UIWebView 的- webView:didFailLoadWithError:
NSLog(@"didFailProvisionalNavigation");
[self loadFailedUI:@"啊哦加載失敗!"];
}
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler {
NSLog(@"decidePolicyForNavigationResponse");
// decisionHandler(WKNavigationActionPolicyAllow);
decisionHandler(WKNavigationResponsePolicyAllow);
}
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
decisionHandler(WKNavigationActionPolicyAllow);
// 類似 UIWebView 的 -webView: shouldStartLoadWithRequest: navigationType:
NSLog(@"4.%@",navigationAction.request);
}
#pragma mark - WKScriptMessageHandler
- (void)userContentController:(WKUserContentController *)userContentController
didReceiveScriptMessage:(WKScriptMessage *)message {
if ([message.name isEqualToString:@"WKOcOrAndroidModel"]) {
// 打印所傳過來的參數，只支持NSNumber, NSString, NSDate, NSArray,
// NSDictionary, and NSNull類型
NSLog(@"%@",message.body);
}
}
4.js的alert彈出要調用
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler {
NSLog(@"%s", __FUNCTION__);
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"alert" message:message preferredStyle:UIAlertControllerStyleAlert];
[alert addAction:[UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
completionHandler();
}]];
[self presentViewController:alert animated:YES completion:NULL];
NSLog(@"%@", message);
}
5.
iOS 8 引入WKWebView, WKWebView 不支持JavaScriptCore的方式但提供message handler的方式為JavaScript 與Objective-C 通信.
在Objective-C 中使用WKWebView的以下方法調用JavaScript:
- (void)evaluateJavaScript:(NSString *)javaScriptString
completionHandler:(void (^)(id, NSError *))completionHandler
如果JavaScript 代碼出錯, 可以在completionHandler 進行處理.
在Objective-C 中注冊 message handler:
// WKScriptMessageHandler protocol?
- (void)userContentController:(WKUserContentController *)userContentController
didReceiveScriptMessage:(WKScriptMessage *)message
{
NSLog(@"Message: %@", message.body);
}
[userContentController addScriptMessageHandler:handler name:@"myName"];
在JavaScript 將信息發給Objective-C:
// window.webkit.messageHandlers.<name>.postMessage();?
function postMyMessage()? {?
var message = { 'message' : 'Hello, World!', 'numbers' : [ 1, 2, 3 ] };?
window.webkit.messageHandlers.myName.postMessage(message);?
}