WKWebview H5弹框问题

(void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler {
NSLog(@"runJavaScriptAlertPanelWithMessage");
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"" message:message delegate:nil cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
[alert show];
completionHandler();
}

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