App 客户端接入

import android.webkit.WebView;
import android.webkit.WebSettings;
import android.webkit.WebViewClient;
import android.webkit.WebChromeClient;

<uses-permission android:name="android.permission.INTERNET"/>
<application android:usesCleartextTraffic="true">...</application>

<WebView
android:id="@+id/webview"
android:layout_height="match_parent"
android:layout_width="match_parent"
/>

import android.webkit.JavascriptInterface;
public class JsBridge {
@JavascriptInterface
public void getData(String data) {
System.out.println(data);
}
}

public class MainActivity extends AppCompatActivity {
private WebView webview;
private WebSettings webSettings;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}

private void initView() {
webview = (WebView) findViewById(R.id.webview);
webSettings = webview.getSettings();
webSettings.setUseWideViewPort(true);
webSettings.setLoadWithOverviewMode(true);
// 禁用缓存
webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE);
webview.setWebViewClient(new WebViewClient(){
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
// 开启js支持
webSettings.setJavaScriptEnabled(true);
webview.addJavascriptInterface(new JsBridge(), "jsBridge");
// 也可以加载本地html(webView.loadUrl("file:///android_asset/xxx.html"))
webview.loadUrl("https://x.x.x/x/");
}
}

#import <WebKit/WebKit.h>

-(WKWebView *)webView{
if(_webView == nil){    
 //创建网页配置对象
 WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
 // 创建设置对象
 WKPreferences *preference = [[WKPreferences alloc]init];
 //设置是否支持 javaScript 默认是支持的
 preference.javaScriptEnabled = YES;
 // 在 iOS 上默认为 NO，表示是否允许不经过用户交互由 javaScript 自动打开窗口
 preference.javaScriptCanOpenWindowsAutomatically = YES;
 config.preferences = preference;      
 //这个类主要用来做 native 与 JavaScript 的交互管理
 WKUserContentController * wkUController = [[WKUserContentController alloc] init];
 //注册一个name为jsToOcNoPrams的js方法 设置处理接收JS方法的对象
 [wkUController addScriptMessageHandler:self  name:@"jsToOcNoPrams"];
 [wkUController addScriptMessageHandler:self  name:@"jsToOcWithPrams"]; 
 config.userContentController = wkUController;     
 _webView = [[WKWebView alloc] initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT) configuration:config];
 // UI 代理
 _webView.UIDelegate = self;
 // 导航代理
 _webView.navigationDelegate = self;        
 //此处即需要渲染的网页
 NSString *path = [[NSBundle mainBundle] pathForResource:@"JStoOC.html" ofType:nil];
 NSString *htmlString = [[NSString alloc]initWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
 [_webView loadHTMLString:htmlString baseURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] bundlePath]]];       
}
return _webView;
}
[self.view addSubview:self.webView];

// 页面开始加载时调用
-(void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation {
}
// 页面加载失败时调用
-(void)webView:(WKWebView *)webView didFailProvisionalNavigation:(null_unspecified WKNavigation *)navigation withError:(NSError *)error {
[self.progressView setProgress:0.0f animated:NO];
}
// 当内容开始返回时调用
-(void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation {
}
// 页面加载完成之后调用
-(void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {
[self getCookie];
}
//提交发生错误时调用
-(void)webView:(WKWebView *)webView didFailNavigation:(WKNavigation *)navigation withError:(NSError *)error {
[self.progressView setProgress:0.0f animated:NO];
}
// 接收到服务器跳转请求即服务重定向时之后调用
-(void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation {
}

<p style="text-align:center"> <button id="btn2" type = "button" onclick = "jsToOcFunction()"> JS调用OC：带参数  </button> </p>
function jsToOcFunction()
{
window.webkit.messageHandlers.jsToOcWithPrams.postMessage({"params":"res.randstr"});
}

-(void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message{
//此处message.body即传给客户端的json数据
//用message.body获得JS传出的参数体
NSDictionary * parameter = message.body;
//JS调用OC
if([message.name isEqualToString:@"jsToOcWithPrams"]){
//在此处客户端得到js透传数据 并对数据进行后续操作
parameter[@"params"]
}
}