使用WKWebView与H5交互

1.注册代理
<WKUIDelegate,WKNavigationDelegate,WKScriptMessageHandler>
2.新建webview和实例化WKWebViewConfiguration对象

_webView = [[WKWebView alloc] init];
//初始化WKWebViewConfiguration
WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
// 实例化对象
config.userContentController = [WKUserContentController new];
[config.userContentController addScriptMessageHandler:self name:@"returnMsg"];
// 进行偏好设置
WKPreferences *preferences = [WKPreferences new];
preferences.javaScriptCanOpenWindowsAutomatically = YES;
config.preferences = preferences;
self.webView = [[WKWebView alloc] initWithFrame:CGRectMake(0, HuiStutasH, SCREEN_WIDTH, SCREEN_HEIGHT-HuiStutasH - (kDevice_Is_iPhoneX ? 34 : 0)) configuration:config];
[self.view addSubview:_webView];
//设置代理
_webView.UIDelegate = self;
_webView.navigationDelegate = self;
[_webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.urlStr]]];

3.代理方法
//H5回调 TODO
// 添加scriptMessageHandler

• (void)addScriptMessageHandler:(id <WKScriptMessageHandler>)scriptMessageHandler name:(NSString *)name{}

• (void)userContentController:(nonnull WKUserContentController *)userContentController didReceiveScriptMessage:(nonnull WKScriptMessage *)message {

  if ([message.name isEqualToString:@"returnMsg"]) {

    //跳转到借款记录
    TCRecordVC *recordVC = [[TCRecordVC alloc] init];
    recordVC.typeNum = @1;
    [self.navigationController pushViewController:recordVC animated:YES];
  

  }
  }

4.H5代码
window.webkit.messageHandlers.returnMsg.postMessage()