首页 > 代码库 > WKWebView的一些知识

WKWebView的一些知识

WKWebView的特点:

  • 性能高,稳定性好,占用的内存比较小,
  • 支持JS交互
  • 支持HTML5 新特性
  • 可以添加进度条(然并卵,不好用,还是习惯第三方的)。
  • 支持内建手势,
  • 据说高达60fps的刷新频率(不卡)

创建时候很简单

  1. 导入Wbkit这个类库(WKWebVeiw包含在里面的)

  2. 遵守协议(一般前两个就行啦,第三个主要是与JS相关的东西,这个协议中包含一个必须实现的方法,这个方法是提高App与web端交互的关键,它可以直接将接收到的JS脚本转为OC或Swift对象--网上大神说的,我没用过。)

@interface ViewController : UIViewController<WKNavigationDelegate,WKUIDelegate,WKScriptMessageHandler>

3.创建个WebView的对象

    WKWebView *webView = [[WKWebView alloc] initWithFrame:self.view.bounds];    [webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.baidu.com"]]];    [self.view addSubview:webView];

1. WKNavigationDelegate来追踪加载过程

// 页面开始加载时调用- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation;// 当内容开始返回时调用- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation;// 页面加载完成之后调用- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation;// 页面加载失败时调用- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation;

 2.WKNavigtionDelegate来进行页面跳转

// 接收到服务器跳转请求之后再执行- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation;// 在收到响应后,决定是否跳转- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler;// 在发送请求之前,决定是否跳转
######可以跳转appStore或者拨号(WKWebView默认不支持 打开ituns.apple.com跳转到appStore, 拨打电话, 唤起邮箱等一系列操作
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
if(webView != self.wkWebView) {
decisionHandler(WKNavigationActionPolicyAllow);
return;
}
UIApplication *app = [UIApplication sharedApplication];
if ([url.scheme isEqualToString:@"tel"])
{
if ([app canOpenURL:url])
{
[app openURL:url];
decisionHandler(WKNavigationActionPolicyCancel);
return;
}
}
if ([url.absoluteString containsString:@"ituns.apple.com"])
{
if ([app canOpenURL:url])
{
[app openURL:url];
decisionHandler(WKNavigationActionPolicyCancel);
return;
}
}
decisionHandler(WKNavigationActionPolicyAllow);
}

2. WKUIDelegate

//1.创建一个新的WebVeiw- (nullable WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures;//2.WebVeiw关闭(9.0中的新方法)- (void)webViewDidClose:(WKWebView *)webView NS_AVAILABLE(10_11, 9_0);//3.显示一个JS的Alert(与JS交互)- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler;//4.弹出一个输入框(与JS交互的)- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * __nullable result))completionHandler;//5.显示一个确认框(JS的)- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL result))completionHandler;




注意:
方法里有block的要根据block返回对应的对象,不然会崩掉








WKWebView的一些知识