iOS开发笔记之WKWebView的基本使用

// 导入头文件
#import <WebKit/WebKit.h>

// 遵循WKUIDelegate, WKNavigationDelegate, WKScriptMessageHandler

@property (strong, nonatomic) WKWebView *webView;
@property (strong, nonatomic) WKUserContentController *userContentController;

- (void)initViews {
    WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
    WKUserContentController *userContentController = [[WKUserContentController alloc] init];
    self.userContentController = userContentController;
    [userContentController addScriptMessageHandler:self name:@"finish"];
    configuration.userContentController = userContentController;
    
    WKWebView *webView = [[WKWebView alloc] initWithFrame:CGRectMake(0, 0, 375, 667) configuration:configuration];
    webView.UIDelegate = self;
    webView.navigationDelegate = self;
    [self.view addSubview:webView];
    self.webView = webView;
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"url"] cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:15];
//    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [self.webView loadRequest:request];
}

//    [self.webView evaluateJavaScript:@"f(方法名)" completionHandler:nil];  // 调用js方法

#pragma mark - WKNavigationDelegate  // （按触发顺序排列）

// 在发送请求之前，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
    
//    NSLog(@"发送请求前决定是否跳转======%@",navigationAction.request.URL.absoluteString);
    //允许跳转
    decisionHandler(WKNavigationActionPolicyAllow);
    //不允许跳转
    //decisionHandler(WKNavigationActionPolicyCancel);
}

// 页面开始加载时调用
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation {
//    NSLog(@"开始加载======%@",self.webView.URL.absoluteString);
}

// 在收到响应后，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler {
    
//    NSLog(@"收到响应，决定是否跳转======%@",navigationResponse.response.URL.absoluteString);
    
    //允许跳转
    decisionHandler(WKNavigationResponsePolicyAllow);
    //不允许跳转
    //decisionHandler(WKNavigationResponsePolicyCancel);
}

// 当内容开始返回时调用
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation {
//    NSLog(@"内容开始返回======%@",self.webView.URL.absoluteString);
}

// 页面加载完成之后调用
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {
//    NSLog(@"页面加载完成======%@",self.webView.URL.absoluteString);
}

// 页面加载失败时调用
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation {
}

// 接收到服务器跳转请求之后调用
- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation {
//    NSLog(@"接收到服务器跳转请求======%@",webView.URL.absoluteString);
}

#pragma mark - WKUIDelegate

// 创建一个新的WebView
//- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures{
//    return [[WKWebView alloc]init];
//}

// 输入框
//- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * __nullable result))completionHandler{
//    completionHandler(@"");
//}

// 确认框
//- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL result))completionHandler{
//    completionHandler(YES);
//}

// 警告框
//- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler{
//    completionHandler();
//}

#pragma mark - WKScriptMessageHandler

// js调用oc方法  js代码格式：window.webkit.messageHandlers.方法名.postMessage({body: 'hello world!'});
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message {
    if ([message.name isEqualToString:@"方法名"]) {
        // 调用方法
    }
}