一、JS调用原生
//注入监听js的事件
WKUserContentController *_userContentController = [[WKUserContentController alloc] init];
// NSString *jsButtonId = @"buttonId";
NSString *jsMessage =@"UnityBack";//监听js的方法名【注：window.webkit.messageHandlers.UnityBack<这个方法名就是原生监听的方法名>.postMessage("这是js返回给原生的body")】
//给js按钮添加事件
//NSString *scriptStr = [NSString stringWithFormat:@"function fun(){window.webkit.messageHandlers.%@.postMessage(null);}(function(){var btn=document.getElementById(\"%@\");btn.addEventListener('click',fun,false);}());", jsMessage, jsButtonId];
//WKUserScript *userScript = [[WKUserScript alloc] initWithSource:scriptStr injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
//[_userContentController addUserScript:userScript];
//webview监听js的事件【name：方法名】
[_userContentController addScriptMessageHandler:self name:jsMessage];//注：销毁时需做相应的移除操作 removeScriptMessageHandlerForName
WKWebViewConfiguration *_configuration = [[WKWebViewConfiguration alloc] init];
_configuration.userContentController = _userContentController;
WKWebView * webView = [[WKWebView alloc] initWithFrame:[UIScreen mainScreen].bounds configuration:_configuration];
webView.translatesAutoresizingMaskIntoConstraints =NO;
webView.UIDelegate = self;
webView.navigationDelegate = self;
if(@available(iOS11.0, *)) {
webView.scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
}
[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:url]]];
====== 以上是简单的初始化方法 ========
====== 以下是WKNavigationDelegate和WKScriptMessageHandler的代理方法 ========
#pragma WKNavigationDelegate 代理方法
// 页面开始加载时调用
- (void)webView:(WKWebView *)webViewdidStartProvisionalNavigation:(WKNavigation *)navigation{
NSLog(@"页面开始加载");
}
// 当内容开始返回时调用
- (void)webView:(WKWebView *)webViewdidCommitNavigation:(WKNavigation *)navigation{
NSLog(@"当内容开始返回时");
}
// 页面加载完成之后调用
- (void)webView:(WKWebView *)webViewdidFinishNavigation:(WKNavigation *)navigation{
NSLog(@"页面加载完成之后");
}
// 页面加载失败时调用
- (void)webView:(WKWebView *)webViewdidFailProvisionalNavigation:(WKNavigation *)navigation{
NSLog(@"页面加载失败");
}
/*- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
NSString *url = navigationAction.request.URL.absoluteString;
if ([url rangeOfString:@"需要跳转源生界面的URL判断"].location != NSNotFound) {
//跳转原生界面
//Cancel the navigation
decisionHandler(WKNavigationActionPolicyCancel);
return;
}
/* <a href = "xxx" target = "_blank">
a 超连接中target的意思
_blank -- 在新窗口中打开链接
_parent -- 在父窗体中打开链接
_self -- 在当前窗体打开链接,此为默认值
_top -- 在当前窗体打开链接，并替换当前的整个窗体(框架页)
*/
//如果是跳转一个新页面需要loadRequest，否则点击网页的链接可能无反应
if(navigationAction.targetFrame ==nil) {
[webView loadRequest:navigationAction.request];
}
decisionHandler(WKNavigationActionPolicyAllow);
}*/
#pragma mark --- WKScriptMessageHandler ---
- (void)userContentController:(WKUserContentController *)userContentControllerdidReceiveScriptMessage:(WKScriptMessage *)message {
NSLog(@"message.name:%@", message.name);
NSLog(@"message.body:%@", message.body);//JS传过来的参数
//TODO:根据注入js的name做想做的操作
if([message.name isEqualToString:@"UnityBack"]){//处理js UnityBack的事件
//TODO:
}
}
二、原生调用JS
注入方法：- (void)evaluateJavaScript:(NSString*)javaScriptString completionHandler:(void(^ _Nullable)(_Nullableid,NSError* _Nullable error))completionHandler;
//这里需要设置js的方法名和所需传入的参数；如下：toCallJS是js的方法名
NSString*jsFunction = [NSStringstringWithFormat:@"toCallJS('%@')",AA];
[self.webView evaluateJavaScript:jsFunction completionHandler:^(id object,NSError* _Nullable error) {
//TODO:
}];
