iOS:WKWebView JS 交互这点事

#import <WebKit/WebKit.h>

   NSString *jsmethod = [NSString stringWithFormat:@"mymethd(\"%@\")",data]; //data（NSDate）为要传给js的数据
        [self.wkWebView  evaluateJavaScript:jsmethod completionHandler:^(id _Nullable result, NSError * _Nullable error) {
//   result  js返回值
        }];

@interface SharecgiteViewController ()<WKNavigationDelegate,WKScriptMessageHandler>

 WKWebViewConfiguration *webviewConfig = [[WKWebViewConfiguration alloc] init];
        webviewConfig.userContentController = wkUController;
        [webviewConfig.userContentController addScriptMessageHandler:self name:@"share"];
        
        WKWebView  *webView = [[WKWebView alloc ] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height - 64) configuration:webviewConfig];

#pragma mark - WKScriptMessageHandler

- (void)userContentController:(WKUserContentController *)userContentController
      didReceiveScriptMessage:(WKScriptMessage *)message {
    
    if ([message.name isEqualToString: @"share"]) {
        NSLog(@"%@",message.body);
    }
    
}

window.webkit.messageHandlers.share.postMessage(message);

 WKUserContentController *controller = self.wkWebView.configuration.userContentController;
    [controller removeScriptMessageHandlerForName:@"share"];