WKWebView捕获HTML弹出的Alert和Confirm

为了响应html的alert和confirm事件，需要添加WKWebView的代理方法，如下：

- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler {
LILog(@"runJavaScriptAlertPanelWithMessage");
[LIUseFunc alertWithMessage:message];
}

- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL))completionHandler {
LILog(@"runJavaScriptConfirmPanelWithMessage");
}

但是程序上面的程序就出出现如下错误：

runJavaScriptAlertPanelWithMessage:initiatedByFrame:completionHandler:] was not called

出现这个程序之后就崩掉了，因为completionHandler这个block需要执行才行，所以我们需要写成类似如下：

- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler {
LILog(@"runJavaScriptAlertPanelWithMessage");
[LIUseFunc alertWithMessage:message];
completionHandler();
}

- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL))completionHandler {
LILog(@"runJavaScriptConfirmPanelWithMessage");
completionHandler(NO);
}

这下就好了…