总结Flex与浏览器交互
在用flex做Web应用时为了扩展应用程序功能，势必会更多的同浏览器进行交互，这样就会用到下面介绍的知识
1、在Flex中实现URL 跳转(使用flash.net.navigateToURL()方法如：)
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/*
* param1: 要跳转的URL
* param2: 跳转方式 _blank /_self
*/
navigateToURL(new URLRequest("http://blog.csdn.net/xingjunli"),"_blank");
/*
* param1: 要跳转的URL
* param2: 跳转方式 _blank /_self
*/
navigateToURL(new URLRequest("http://blog.csdn.net/xingjunli"),"_blank");
2、使用FlashVars传替换参数（使用Application.application.parameters属性）
页面嵌入SWF文件代码（我们可以通过JS动态来设置FlashVars信息已达到数据交互的目的）
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<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="100%" height="100%" id="mySwf">
<param name="movie" value="main.swf" />
<param name="quality" value="high" />
<param name="bgcolor" value="#869ca7" />
<param name="allowScriptAccess" value="sameDomain" />
<param name="FlashVars" value="UserName=Andy_liu&Age=18&Address=HongKong" />
</object>
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="100%" height="100%" id="mySwf">
<param name="movie" value="main.swf" />
<param name="quality" value="high" />
<param name="bgcolor" value="#869ca7" />
<param name="allowScriptAccess" value="sameDomain" />
<param name="FlashVars" value="UserName=Andy_liu&Age=18&Address=HongKong" />
</object>
Flex中获取参数代码:
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private function onFlashVars(e:MouseEvent):void //获取页面参数
{
var parameters:Object = Application.application.parameters;
labURL.text = Application.application.url.toString(); // http://localhost:8889/main.swf
var param1:String = parameters.UserName; // Andy_liu
var param2:int = parseInt(parameters.Age); // 18
var param3:String = parameters.Address; // HongKong
/*
txtParam1.text = param1;
txtParam2.text = String(param2);
txtParam3.text = param3;
*/
}
private function onFlashVars(e:MouseEvent):void //获取页面参数
{
var parameters:Object = Application.application.parameters;
labURL.text = Application.application.url.toString(); // http://localhost:8889/main.swf
var param1:String = parameters.UserName; // Andy_liu
var param2:int = parseInt(parameters.Age); // 18
var param3:String = parameters.Address; // HongKong
/*
txtParam1.text = param1;
txtParam2.text = String(param2);
txtParam3.text = param3;
*/
}
3、在Flex中调用JavaScript函数
先在页面中完成js function(注在Flex中只能调用当前页面引入的JS函数)
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function ShowUserInfo(name,age,address)
{
alert("Name:" + name+"\n" + "Age:" + age + "\n" +"Address"+address);
return "Call Successful!"
}
function ShowUserInfo(name,age,address)
{
alert("Name:" + name+"\n" + "Age:" + age + "\n" +"Address"+address);
return "Call Successful!"
}
Flex中调用方法并获取JS function返回值（ 使用ExternalInterface.call()方法）：
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private function onCallJS(e:MouseEvent):void
{
/*
* param1:当前页JS function 方法名
* param...传递的参数0-N个
*/
var resultValue:String = ExternalInterface.call("ShowUserInfo",txtParam1.text,txtParam2.text,txtParam3.text);
//resultValue = Call Successful!
}
private function onCallJS(e:MouseEvent):void
{
/*
* param1:当前页JS function 方法名
* param...传递的参数0-N个
*/
var resultValue:String = ExternalInterface.call("ShowUserInfo",txtParam1.text,txtParam2.text,txtParam3.text);
//resultValue = Call Successful!
}
4、在JavaScript中调用ActionScript函数
页面中调用的JS 函数
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function CallFlexMethod()
{
var swf="mySwf";
var container;
//alert(navigator.appName);
if(navigator.appName.indexOf("Microsoft")>=0)
{
container = document;
}
else
{
container = window;
}
container[swf].flexFunction1(); //无参方法
container[swf].flexFunction2("myHtmlRequest!");//参数传递方法
alert(container[swf].flexFunction3()); //含返回值方法
}
function CallFlexMethod()
{
var swf="mySwf";
var container;
//alert(navigator.appName);
if(navigator.appName.indexOf("Microsoft")>=0)
{
container = document;
}
else
{
container = window;
}
container[swf].flexFunction1(); //无参方法
container[swf].flexFunction2("myHtmlRequest!");//参数传递方法
alert(container[swf].flexFunction3()); //含返回值方法
}
Flex中注册和调用执行的方法：
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//重要必须在Flex中执行如下注册 才能在JS中调用
private function registerCallBacks():void
{
ExternalInterface.addCallback("flexFunction1",jsCallBack1);
ExternalInterface.addCallback("flexFunction2",jsCallBack2);
ExternalInterface.addCallback("flexFunction3",jsCallBack3);
}
private function jsCallBack1():void
{
Alert.show("Call First Flex Method!");
}
private function jsCallBack2(params:*):void
{
Alert.show("Call Method2:" + String(params));
}
private function jsCallBack3():String
{
return Math.random().toString();
}
//重要必须在Flex中执行如下注册 才能在JS中调用
private function registerCallBacks():void
{
ExternalInterface.addCallback("flexFunction1",jsCallBack1);
ExternalInterface.addCallback("flexFunction2",jsCallBack2);
ExternalInterface.addCallback("flexFunction3",jsCallBack3);
}
private function jsCallBack1():void
{
Alert.show("Call First Flex Method!");
}
private function jsCallBack2(params:*):void
{
Alert.show("Call Method2:" + String(params));
}
private function jsCallBack3():String
{
return Math.random().toString();
}
5、BrowserManager管理组件应用
BrowserManager 是一个 Singleton 管理器，用于充当浏览器和应用程序之间的代理。使用它可以访问浏览器地址栏中的 URL，这与访问 JavaScript 中的 document.location 属性类似。当 url 属性发生更改时调度这些事件。然后侦听器可以响应、更改该 URL 或阻止其它对象获取此事件。
获得bm实例：
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private var bm:IBrowserManager = BrowserManager.getInstance();
private var bm:IBrowserManager = BrowserManager.getInstance();
a、获取URL传递的参数：
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private function getBrowserValue():void
{
//URL = "http://localhost/browser/main.html#name=peter;age=25;address=shenzhen china"
var o:Object = URLUtil.stringToObject(bm.fragment);
txtURLName.text = o.name; // peter
txtURLAge.text = o.age; // 25
txtURLAddress.text = o.address; // shenzhen china
}
private function getBrowserValue():void
{
//URL = "http://localhost/browser/main.html#name=peter;age=25;address=shenzhen china"
var o:Object = URLUtil.stringToObject(bm.fragment);
txtURLName.text = o.name; // peter
txtURLAge.text = o.age; // 25
txtURLAddress.text = o.address; // shenzhen china
}
b、获取浏览器信息(请求URL：“http://localhost:8889/main.html#name=peter;age=25;address=shenzhen%20china”)
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private function onBrowserManager(e:MouseEvent):void
{
txtBMOutPut.text += "Full URL: \n" + bm.url + "\n\n";
txtBMOutPut.text += "Base URL: \n" + bm.base + "\n\n";
txtBMOutPut.text += "URL Fragment URL: \n" + bm.fragment + "\n-----------\n";
var o:Object = URLUtil.stringToObject(bm.fragment);
txtBMOutPut.text += "Object: \n" + ObjectUtil.toString(o) + "\n\n";
txtBMOutPut.text += "Name: \n" + o.name + "\n\n";
txtBMOutPut.text += "Age: \n" + o.age + "\n\n";
txtBMOutPut.text += "Address: \n" + o.address + "\n-----------\n";
txtBMOutPut.text += "URL Port: \n" + URLUtil.getPort(bm.url) + "\n\n";
txtBMOutPut.text += "URL Protocol: \n" + URLUtil.getProtocol(bm.url) + "\n\n";
txtBMOutPut.text += "URL Server: \n" + URLUtil.getServerName(bm.url) + "\n\n";
txtBMOutPut.text += "URL Server with Port: \n" + URLUtil.getServerNameWithPort(bm.url) + "\n-----------\n";
/* 执行结果:
Full URL:
http://localhost:8889/main.html#name=peter;age=25;address=shenzhen%20china
Base URL:
http://localhost:8889/main.html
URL Fragment URL:
name=peter;age=25;address=shenzhen%20china
-----------
Object:
(Object)#0
address = "shenzhen china"
age = 25
name = "peter"
Name:
peter
Age:
25
Address:
shenzhen china
-----------
URL Port:
8889
URL Protocol:
http
URL Server:
localhost
URL Server with Port:
localhost:8889
-----------
*/
}
private function onBrowserManager(e:MouseEvent):void
{
txtBMOutPut.text += "Full URL: \n" + bm.url + "\n\n";
txtBMOutPut.text += "Base URL: \n" + bm.base + "\n\n";
txtBMOutPut.text += "URL Fragment URL: \n" + bm.fragment + "\n-----------\n";
var o:Object = URLUtil.stringToObject(bm.fragment);
txtBMOutPut.text += "Object: \n" + ObjectUtil.toString(o) + "\n\n";
txtBMOutPut.text += "Name: \n" + o.name + "\n\n";
txtBMOutPut.text += "Age: \n" + o.age + "\n\n";
txtBMOutPut.text += "Address: \n" + o.address + "\n-----------\n";
txtBMOutPut.text += "URL Port: \n" + URLUtil.getPort(bm.url) + "\n\n";
txtBMOutPut.text += "URL Protocol: \n" + URLUtil.getProtocol(bm.url) + "\n\n";
txtBMOutPut.text += "URL Server: \n" + URLUtil.getServerName(bm.url) + "\n\n";
txtBMOutPut.text += "URL Server with Port: \n" + URLUtil.getServerNameWithPort(bm.url) + "\n-----------\n";
/* 执行结果:
Full URL:
http://localhost:8889/main.html#name=peter;age=25;address=shenzhen%20china
Base URL:
http://localhost:8889/main.html
URL Fragment URL:
name=peter;age=25;address=shenzhen%20china
-----------
Object:
(Object)#0
address = "shenzhen china"
age = 25
name = "peter"
Name:
peter
Age:
25
Address:
shenzhen china
-----------
URL Port:
8889
URL Protocol:
http
URL Server:
localhost
URL Server with Port:
localhost:8889
-----------
*/
}
c、BrowserManager还包含其它一些浏览器的扩展方法如：bm.setTitle("新标题：正在培训!")修改页面标题等...参考 http://livedocs.adobe.com/flex/3/html/help.html?content=deep_linking_3.html
6、在Flex中通过实现mx.managers.IHistoryManagerClinet接口来实现自定义历史记录管理器
自定义textInput
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<?xml version="1.0" encoding="utf-8"?>
<mx:TextInput xmlns:mx="http://www.adobe.com/2006/mxml" text="Change Me!" implements="mx.managers.IHistoryManagerClient"
creationComplete="mx.managers.HistoryManager.register(this);" change="textChanged(event)">
<mx:Script>
<!--[CDATA[
import mx.managers.HistoryManager;
private function textChanged(e:Event):void
{
HistoryManager.save();
}
public function saveState():Object
{
return {text:text};
}
public function loadState(state:Object):void
{
var newState:String = state?state.text:"";
if(newState != text)
{
text = unescape(newState);
}
}
]]-->
</mx:Script>
</mx:TextInput>
<?xml version="1.0" encoding="utf-8"?>
<mx:TextInput xmlns:mx="http://www.adobe.com/2006/mxml" text="Change Me!" implements="mx.managers.IHistoryManagerClient"
creationComplete="mx.managers.HistoryManager.register(this);" change="textChanged(event)">
<mx:Script>
<!--[CDATA[
import mx.managers.HistoryManager;
private function textChanged(e:Event):void
{
HistoryManager.save();
}
public function saveState():Object
{
return {text:text};
}
public function loadState(state:Object):void
{
var newState:String = state?state.text:"";
if(newState != text)
{
text = unescape(newState);
}
}
]]-->
</mx:Script>
</mx:TextInput>
当我们在使用上面自定义的TextInput时会发现在浏览器URL中会动态创建修入如这样的一些信息“#app=a4e4&8211- text=asdfasdfasdfsd%20”故FLEX通过浏览器URL记录SWF文件中组件的变化已实现保存历史记录数据已实现历史记录管理！
