以WKWebView为例
监听JS方法: - (void)addScriptMessageHandler:(id <WKScriptMessageHandler>)scriptMessageHandler name:(NSString *)name;
WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
WKUserContentController *controller = [[WKUserContentController alloc] init];
//监听的JS @"goMsPage"为监听JS方法
[controller addScriptMessageHandler:self name:@"goMsPage"];
configuration.userContentController = controller;
WKWebView *webView = [[WKWebView alloc]initWithFrame:CGRectZero configuration:configuration];
<WKScriptMessageHandler> 代理需要实现方法处理事件:- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message
{
if ([message.name isEqualToString:@"goMsPage"]) {
//处理事件
}
}
还有很关键的一点
- JS的实现必须为
window.webkit.messageHandlers.goMsPage.postMessage("");如果你家Android没问题你监听不到就让你家前段适配一下吧。
iOS调用JS方法：- (void)evaluateJavaScript:(NSString *)javaScriptString completionHandler:(void (^ _Nullable)(_Nullable id, NSError * _Nullable error))completionHandler;
[webView evaluateJavaScript:@"appback('string')" completionHandler:^(id _Nullable obj, NSError * _Nullable error) {
}];
