wkwebview 和 JS 自用

-(void)webView:(WKWebView *)webView didCommitNavigation:(null_unspecified WKNavigation *)navigation{
    //获取 当前页URL
    NSString *js = @"document.location.href";
    [self.webView evaluateJavaScript:js completionHandler:^(id _Nullable response, NSError * _Nullable error) {
        NSLog(@"response: %@", response);
    }];
    
}

//这个调用只能放在 finish 里，不然会报JS 异常
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation{
    NSString *js = @"headHide()";
    [self.webView evaluateJavaScript:js completionHandler:^(id _Nullable response, NSError * _Nullable error) {
        NSLog(@"\n error: %@", error);
    }];

}