WKWebView中经常用到的操作

WKWebView相对UIWebView的直观优势

• 更多的支持HTML5的特性
• 官方宣称的高达60fps的滚动刷新率以及内置手势
• 占用更少的内存

现在总结一下我们用WKWebView时经常用到的一些操作

页面允许跳转与取消

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{if (navigationAction.targetFrame &＃61;&＃61; nil) {[webView loadRequest:navigationAction.request];}if ([navigationAction.request.URL.absoluteString containsString:&＃64;"wexin://"]){ //当url中存在weixin://时不进行页面跳转,进行其它操作//TODO: 做一些其它操作decisionHandler(WKNavigationActionPolicyCancel);}else{decisionHandler(WKNavigationActionPolicyAllow);}
}


WK与JS交互

//**********WK与JS交互**********
//配置
- (WKWebViewConfiguration *)configuration{if (!_configuration) {_configuration &＃61; [[WKWebViewConfiguration alloc] init];WKUserContentController *userContentController &＃61; [[WKUserContentController alloc] init];//jumpQRCode是和JS约定好的字符串,保证JS调用OC时判断相同就行,没有具体限制[userContentController addScriptMessageHandler:self name:&＃64;"jumpQRCode"]; _configuration.userContentController &＃61; userContentController;self.webView.configuration &＃61; _configuration;}return _configuration;
}
//JS调用OC
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message{if ([message.name isEqualToString:&＃64;"openQRCode”]) {[self openQRCode];}
}
- (void)openQRCode{
//OC调用JS
NSString *JSResult &＃61; [NSString stringWithFormat:&＃64;"callback(&＃39;%&＃64;&＃39;,&＃39;%&＃64;&＃39;)", index,strScan]; //JS方法名和参数
[self.webView evaluateJavascript:JSResult completionHandler:^(id _Nullable result, NSError * _Nullable error) {NSLog(&＃64;"完成....");
}];
}

WKWebView加载Webp

COOKIE丢失

NSString *COOKIEStr &＃61; [self setJSCOOKIE];
WKUserScript *COOKIEScipt &＃61; [[WKUserScript alloc] initWithSource:COOKIEStr injectionTime:WKUserScriptInjectionTimeAtDocumentStart forMainFrameOnly:NO];
WKUserContentController *wku &＃61; [[WKUserContentController alloc] init];
[wku addScriptMessageHandler:self name:&＃64;"openPay"];
[wku addUserScript:COOKIEScipt];-(NSString *)setJSCOOKIE{NSMutableDictionary *COOKIEsDic &＃61; [[LFCacheTool lf_getCacheObjectFromKey:COOKIES] mutableCopy];__block NSString *COOKIEStr &＃61; &＃64;"";[COOKIEsDic enumerateKeysAndObjectsUsingBlock:^(id _Nonnull key, id _Nonnull obj, BOOL * _Nonnull stop) {NSDictionary *dic &＃61; obj;NSString *appendString;if ([self.url rangeOfString:&＃64;"丢失COOKIE的链接"].location !&＃61; NSNotFound){//根据后台需要的样式修改COOKIE(多参数少参数都可能获取失败)appendString&＃61; [NSString stringWithFormat:&＃64;"&＃39;%&＃64;&＃61;%&＃64;;path&＃61;/;domain&＃61;%&＃64;&＃39;;",key, dic[&＃64;"Value"],&＃64;"丢失COOKIE的链接"];}COOKIEStr &＃61; [NSString stringWithFormat:&＃64;"%&＃64;document.COOKIE&＃61;%&＃64;",COOKIEStr,appendString];}];return COOKIEStr;
}