详解JS与APP原生控件交互

package com.chinaonenet.mywebview;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.widget.Button;
/**
 * SuppressLint一定要加上去！！！
 * 低版本可能没问题，高版本JS铁定调不了Android里面的方法
 */
@SuppressLint("SetJavaScriptEnabled")
public class MainActivity extends Activity {
 private Button button1,button2;
 private WebView mWebView;
 private MyWebViewClient WVClient;
 private WebSettings webSettings;
 private MyWebChromeClient chromeClient;
 //封装接收js调用Android的方法类
 private JSObject jsobject;
 //异步请求
 private Handler mHandler = new Handler();
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 init();
 initView();
 setButton();
 }
 private void setButton() {
 //无参调用
 button1.setOnClickListener(new OnClickListener() {
  @Override
  public void onClick(View v) {
  mHandler.post(new Runnable() {
   @Override
   public void run() {
   mWebView.loadUrl("javascript:showNoMessage()");
   }
  });
  }
 });
 //有参调用
 button2.setOnClickListener(new OnClickListener() {
  @Override
  public void onClick(View v) {
  mHandler.post(new Runnable() {
   @Override
   public void run() {
   mWebView.loadUrl("javascript:showMessage('顺带给JS传个参数')");
   }
  });
  }
 });
 }
 private void init() {
 mWebView = (WebView) findViewById(R.id.webview);
 button1 = (Button)findViewById(R.id.button1);
 button2 = (Button)findViewById(R.id.button2);
 WVClient = new MyWebViewClient();
 chromeClient = new MyWebChromeClient();
 jsobject = new JSObject(MainActivity.this); 
 }
 private void initView() {
 webSettings = mWebView.getSettings();
 webSettings.setJavaScriptEnabled(true);
 webSettings.setBuiltInZoomControls(true);
 webSettings.setSavePassword(false);
 //支持多种分辨率，需要js网页支持
 webSettings.setUserAgentString("mac os");
 webSettings.setDefaultTextEncodingName("utf-8");
 //显示本地js网页
 mWebView.loadUrl("file:///android_asset/test.html");
 mWebView.setWebViewClient(WVClient);
 mWebView.setWebChromeClient(chromeClient);
 //注意第二个参数android，这个是JS网页调用Android方法的一个类似ID的东西
 mWebView.addJavascriptInterface(jsobject, "android");
 }
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
tools:context="com.chinaonenet.mywebview.MainActivity" >
 <Button
 android:id="@+id/button1"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_alignParentLeft="true"
 android:text="无参" />
 <Button
 android:id="@+id/button2"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_alignParentRight="true"
 android:text="有参" />
 <WebView
 android:id="@+id/webview"
 android:layout_width="wrap_content"
 android:layout_height="match_parent"
 android:layout_alignParentLeft="true"
 android:layout_alignParentRight="true"
 android:layout_below="@+id/button2" />
 <TextView
 android:id="@+id/textView1"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_alignBaseline="@+id/button1"
 android:layout_alignBottom="@+id/button1"
 android:layout_centerHorizontal="true"
 android:text="js与android交互" />
</RelativeLayout>

package com.chinaonenet.mywebview;
import org.json.JSONArray;
import org.json.JSONException;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.webkit.JavascriptInterface;
import android.widget.Toast;
/**
 * JS调用android的方法
 * @JavascriptInterface仍然必不可少
 */
public class JSObject {
 private Context context;
 public JSObject(Context context){
 this.context = context;
 }
 //js调用无参方法
 @JavascriptInterface
 public void callNull(){
 Toast.makeText(context, "JsCallAndroid", Toast.LENGTH_SHORT).show();
 }
 //js调用有参方法
 @JavascriptInterface
 public void callMessage(String data){
 Toast.makeText(context, data, Toast.LENGTH_SHORT).show();
 }
 //js调用有参方法，参数类型：JSON
 @JavascriptInterface
 public void callJson(String data) throws JSONException{
 JSONArray jsonArray = new JSONArray(data);
 Toast.makeText(context, jsonArray.toString(), Toast.LENGTH_SHORT).show();
 }
 //js调用有参方法，参数类型：JSON，获取电话号码拨打
 @JavascriptInterface
 public void callPhone(String data){
 context.startActivity(new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + data)));
 }
}

<style>
 .main-wrap ul {
 width: 100%;
 display: inline-block;
 padding-top: 20px;
 }
 .main-wrap ul li {
  float: left;
  width: 100%;
  height: 40px;
  line-height: 40px;
  font-size: 14px;
  margin-bottom: 20px;
  background-color: #00D000;
  color: #fff;
  text-align: center;
  cursor: pointer;
 }
  .main-wrap ul li:active {
  opacity: 0.8;
  }
</style>
<div class="main-wrap">
 <ul class="postAndroid">
 <li onclick="jsCallAndroid('1')">不传参数调用原生控件</li>
 <li onclick="jsCallAndroid('2')">传参数调用原生控件</li>
 <li onclick="jsCallAndroid('3')">以JSON格式传参数调用原生控件</li>
 <li onclick="jsCallAndroid('4')">调用打电话服务</li>
 </ul>
</div>
<script>
 function jsCallAndroid(rel) {
 switch(rel){
  case "1":
  android.callNull();
  break;
  case "2":
  android.callMessage("javaScript操作Android原生");
  break;
  case "3":
  var json = "[{\"name\":\"满艺网\", \"phone\":\"4008366069\"}]";
  android.callJson(json);
  break;
  case "4":
  android.callPhone("4008366069");
  break;
 }
 }
 function showNoMessage() {
 alert("Android无参调用");
 }
 function showMessage(data) {
 alert("Android有参调用-data:" + data);
 }
</script>

import UIKit
import JavaScriptCore
class ViewController: UIViewController {
 var context = JSContext()
 var jsContext: JSContext?
 @IBOutlet weak var webView: UIWebView!
 override func viewDidLoad() {
 super.viewDidLoad()
 webView.delegate = self//初始化webView
 loadJS()
 }
 /**
 *加载html页面
 */
 func loadJS() {
 let str = NSBundle.mainBundle().pathForResource("test", ofType: "html")
 let request = NSURLRequest(URL: NSURL(string: str!)!)
 webView.loadRequest(request)
 }
 //Swift 调用JS 方法 （无参数）
 @IBAction func swift_js_pargram(sender: AnyObject) {
 self.context.evaluateScript("Swift_JS1()")
 //self.webView.stringByEvaluatingJavaScriptFromString("Swift_JS1()") //此方法也可行
 }
 //Swift 调用JS 方法 （有参数）
 @IBAction func swift_js_nopargam(sender: AnyObject) {
 self.context.evaluateScript("Swift_JS2('Ios' ,'Swift')")
 //self.webView.stringByEvaluatingJavaScriptFromString("Swift_JS2('oc','swift')") //此方法也可行
 }
 //js调用Swift方法（无参）
 func menthod1() {
 print("JS调用了无参数swift方法")
 let title = "操作提示";
 let msg = "JS调用了无参数swift方法";
 //创建提示信息
 let alert = UIAlertController(title: title, message: msg, preferredStyle: .Alert)
 //确定按钮
 alert.addAction(UIAlertAction(title: "ok", style: .Default, handler: nil))
 //显示提示框
 self.presentViewController(alert, animated: true, completion: nil)
 }
 //js调用Swift方法（有参数）
 func menthod2(str1: String, str2: String) {
 print("JS调用了有参数swift方法:参数为\(str1),\(str2)")
 //创建提示信息
 let alert = UIAlertController(title: str1, message: str2, preferredStyle: .Alert)
 //确定按钮
 alert.addAction(UIAlertAction(title: "ok", style: .Default, handler: nil))
 //显示提示框
 self.presentViewController(alert, animated: true, completion: nil)
 }
 func webView(webView: UIWebView, didFailLoadWithError error: NSError) {
 print(error)
 }
}
//js调用Swift方法注入
extension ViewController: UIWebViewDelegate {
 func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
 let str = NSBundle.mainBundle().pathForResource("test", ofType: "html")
 let request = NSURLRequest(URL: NSURL(string: str!)!)
 let connecntion = NSURLConnection(request: request, delegate: self)
 connecntion?.start()
 return true
 }
 func webViewDidStartLoad(webView: UIWebView) {
 print("webViewDidStartLoad----")
 }
 func webViewDidFinishLoad(webView: UIWebView) {
 self.context = webView.valueForKeyPath("documentView.webView.mainFrame.javaScriptContext") as! JSContext
 //JS调用了无参数swift方法---menthod1
 let temp1: @convention(block) () ->() = {
  self.menthod1()
 }
 //forKeyedSubscript:参数为JS调用方法名
 self.context.setObject(unsafeBitCast(temp1, AnyObject.self), forKeyedSubscript: "test1")
 //JS调用了有参数swift方法---menthod2
 let temp2: @convention(block) () ->() = {
  let array = JSContext.currentArguments()//这里接到的array中的内容是JSValue类型
  for object in array {
  print("参数：" + object.toString())
  }
  self.menthod2(array[0].toString(), str2: array[1].toString())
 }
 //forKeyedSubscript:参数为JS调用方法名
 self.context.setObject(unsafeBitCast(temp2, AnyObject.self), forKeyedSubscript: "test2")
 //模型注入的方法
 let model = JSObjCModel()
 model.controller = self
 model.jsContext = context
 self.jsContext = context
 //这一步是将OCModel这个模型注入到JS中，JS就可以通过OCModel调用我们公暴露的方法了。
 self.jsContext?.setObject(model, forKeyedSubscript: "OCModel")
 let url = NSBundle.mainBundle().URLForResource("test", withExtension: "html")
 self.jsContext?.evaluateScript(try? String(contentsOfURL: url!, encoding: NSUTF8StringEncoding));
 self.jsContext?.exceptionHandler = {
  (context, exception) in
  print("exception @", exception)
 }
 }
}
@objc protocol JavaScriptSwiftDelegate: JSExport {
 func callSystemCamera()
 func showAlert(title: String, msg: String)
 func callWithDict(dict: [String: AnyObject])
 func jsCallObjcAndObjcCallJsWithDict(dict: [String: AnyObject])
}
//js调用Swift模型方法
@objc class JSObjCModel: NSObject, JavaScriptSwiftDelegate {
 weak var controller: UIViewController?
 weak var jsContext: JSContext?
 //JS无参调用Swift方法并返回处理结果
 func callSystemCamera() {
 print("js call objc method: callSystemCamera");
 let jsFunc = self.jsContext?.objectForKeyedSubscript("jsFunc");
 jsFunc?.callWithArguments([]);
 }
 //JS有参调用Swift方法
 func showAlert(title: String, msg: String) {
 print("js call objc method: showAlert, title: %@", title, " msg: %@", msg)
 dispatch_async(dispatch_get_main_queue()) { () -> Void in
  let alert = UIAlertController(title: title, message: msg, preferredStyle: .Alert)
  alert.addAction(UIAlertAction(title: "ok", style: .Default, handler: nil))
  self.controller?.presentViewController(alert, animated: true, completion: nil)
 }
 }
 //JS有参调用Swift方法
 func callWithDict(dict: [String : AnyObject]) {
 print("js call objc method: callWithDict, args: %@", dict)
 let alert = UIAlertController(title: "消息提示", message: "查看控制台打印信息", preferredStyle: .Alert)
 alert.addAction(UIAlertAction(title: "ok", style: .Default, handler: nil))
 self.controller?.presentViewController(alert, animated: true, completion: nil)
 }
 //JS有参调用Swift方法并返回处理结果
 func jsCallObjcAndObjcCallJsWithDict(dict: [String : AnyObject]) {
 print("js call objc method: jsCallObjcAndObjcCallJsWithDict, args: %@", dict)
 let jsParamFunc = self.jsContext?.objectForKeyedSubscript("jsParamFunc");
 let dict = NSDictionary(dictionary: ["age": 2, "height": 178, "name": "满艺网"])
 jsParamFunc?.callWithArguments([dict])
 }
}
extension ViewController: NSURLConnectionDelegate,NSURLConnectionDataDelegate {
 func connection(connection: NSURLConnection, didReceiveData data: NSData) {
 print("didReceiveData\(data)")
 }
 func connection(connection: NSURLConnection, willSendRequest request: NSURLRequest, redirectResponse response: NSURLResponse?) -> NSURLRequest? {
 print("request:\(request)response:\(response)")
 return request
 }
 func connection(connection: NSURLConnection, didFailWithError error: NSError) {
 
 }
}
//MARK: - allowsAnyHTTPSCertificateForHost
extension NSURLRequest {
 static func allowsAnyHTTPSCertificateForHost(host: String) -> Bool {
 return true
 }
}

<html>
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <title>JSAndIos</title>
 </head>
 <style>
 .main-wrap ul {
  width: 100%;
  display: inline-block;
  padding-top: 20px;
 }
 .main-wrap ul li {
  float: left;
  width: 100%;
  height: 40px;
  line-height: 40px;
  font-size: 14px;
  margin-bottom: 20px;
  background-color: #00D000;
  color: #fff;
  text-align: center;
  cursor: pointer;
 }
 .main-wrap ul li:active {
  opacity: 0.8;
 }
 </style>
 <body bgcolor="#dddd">
  <div class="main-wrap">
  <ul class="postAndroid">
   <li onclick="JS_Swift1()">不传参数调用原生控件（常规方式）</li>
   <li onclick="JS_Swift2()">传参数调用原生控件（常规方式）</li>
   <li onclick="JS_Swift3()">不传参数调用原生控件,带返回结果处理（模型注入）</li>
   <li onclick="JS_Swift4()">传参数调用原生控件（模型注入）</li>
   <li onclick="JS_Swift5()">传对象格式参数调用原生控件（模型注入）</li>
   <li onclick="JS_Swift6()">传对象格式参数调用原生控件,带返回结果处理（模型注入）</li>
  </ul>
  </div>
  <script>
  function Swift_JS1() {
  alert("Swift调用Js无参方法");
  }
  function Swift_JS2(name,msg) {
  alert("Swift调用Js有参方法，name:"+name+";mes:"+msg);
  }
  function JS_Swift1() {
  test1();
  }
  function JS_Swift2() {
  test2('JsCallSwift', 'Js调用Swift方法');
  }
  function JS_Swift3() {
  OCModel.callSystemCamera();
  }
  //js调用Swift方法，处理返回结果
  function jsFunc() {
  alert('JS调用Swift方法，无返回值结果处理');
  }
  function JS_Swift4() {
  OCModel.showAlertMsg('js send title', 'js send message');
  }
  function JS_Swift5() {
  OCModel.callWithDict({ 'name': 'testname', 'age': 10, 'height': 170 });
  }
  function JS_Swift6() {
OCModel.jsCallObjcAndObjcCallJsWithDict({ 'name': 'testname', 'age': 10, 'height': 170 });
  }
  //注意哦，如果JS写错，可能在OC调用JS方法时，都会出错哦。
  function jsParamFunc (argument) {
  alert("JS调用Swift方法，有返回值处理结果---name:"+argument['name'] + " age:" + argument['age']);
  }
  </script>
 </body>
</html>