WKWebView基本使用

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WKWebView的基本使用和幾個基本的代理方法

 1 #import "ViewController.h" 2 #import <WebKit/WebKit.h> 3 @interface ViewController ()<WKNavigationDelegate,WKUIDelegate> 4 @property(nonatomic,strong)WKWebView *webView; 5 @end 6  7 @implementation ViewController 8  9 - (void)viewDidLoad {10     [super viewDidLoad];11     UIImage *bgImage = [UIImage imageNamed:@"圓角矩形"];12     [self.navigationController.navigationBar setBackgroundImage:bgImage forBarMetrics:UIBarMetricsDefault];13     [self.navigationController.navigationBar setBackgroundColor:[UIColor clearColor]];14     // Do any additional setup after loading the view, typically from a nib.15     self.webView = [[WKWebView alloc] initWithFrame:self.view.bounds];16     [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.hao123.com"]]];17     self.webView.navigationDelegate = self;18     self.webView.allowsBackForwardNavigationGestures = YES;19     [self.view addSubview:self.webView];20 }21 22 -(void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation23 {24     NSLog(@"當頁面開始載入時");25 }26 -(void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation27 {28     NSLog(@"當內容開始返回時調用");29 }30 -(void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation31 {32     NSLog(@"頁面載入完成之後調用");33     [_webView evaluateJavaScript:@"document.body.offsetHeight" completionHandler:^(id _Nullable result, NSError * _Nullable error) {34         NSLog(@"abc:%f",[result doubleValue]);35     }];36 37 }38 -(void)webView:(WKWebView *)webView didFailProvisionalNavigation:(null_unspecified WKNavigation *)navigation withError:(nonnull NSError *)error39 {40     NSLog(@"頁面載入失敗時調用");41 }42 //頁面跳轉的代理方法43 -(void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation44 {45     NSLog(@" 接收到伺服器跳轉請求之後調用");46 }47 -(void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler48 {49     NSLog(@"在收到響應後，決定是否跳轉");50     NSLog(@"%@",navigationResponse.response);51     decisionHandler(WKNavigationResponsePolicyAllow);52 53 }54 -(void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler55 {56     NSLog(@"在發送請求之前，決定是否跳轉");57     NSLog(@"%@",navigationAction.request.URL.absoluteString);58     if ([navigationAction.request.URL.absoluteString rangeOfString:@"https://www.baidu.com"].location != NSNotFound) {59         decisionHandler(WKNavigationActionPolicyAllow);60     }else{61         decisionHandler(WKNavigationActionPolicyAllow);62     }63 }

 

WKWebView基本使用