为了使用 Updater 类,用户或应用程序必须先在本地将 AIR 文件保存到用户的计算机。
注:
AIR 1.5 包括一个更新框架,该框架可帮助开发人员在 AIR 应用程序中提供良好的更新功能。使用此框架比直接使用 Updater 类的
update()
方法简单许多。有关详细信息,请参阅
使用更新框架
。
以下代码从一个 URL (http://example.com/air/updates/Sample_App_v2.air) 读取 AIR 文件,然后将该 AIR 文件保存到应用程序存储目录中。
ActionScript 示例:
var urlString:String = "http://example.com/air/updates/Sample_App_v2.air";
var urlReq:URLRequest = new URLRequest(urlString);
var urlStream:URLStream = new URLStream();
var fileData:ByteArray = new ByteArray();
urlStream.addEventListener(Event.COMPLETE, loaded);
urlStream.load(urlReq);
function loaded(event:Event):void {
urlStream.readBytes(fileData, 0, urlStream.bytesAvailable);
writeAirFile();
}
function writeAirFile():void {
var file:File = File.applicationStorageDirectory.resolvePath("My App v2.air");
var fileStream:FileStream = new FileStream();
fileStream.open(file, FileMode.WRITE);
fileStream.writeBytes(fileData, 0, fileData.length);
fileStream.close();
trace("The AIR file is written.");
}
JavaScript 示例:
var urlString = "http://example.com/air/updates/Sample_App_v2.air";
var urlReq = new air.URLRequest(urlString);
var urlStream = new air.URLStream();
var fileData = new air.ByteArray();
urlStream.addEventListener(air.Event.COMPLETE, loaded);
urlStream.load(urlReq);
function loaded(event) {
urlStream.readBytes(fileData, 0, urlStream.bytesAvailable);
writeAirFile();
}
function writeAirFile() {
var file = air.File.desktopDirectory.resolvePath("My App v2.air");
var fileStream = new air.FileStream();
fileStream.open(file, air.FileMode.WRITE);
fileStream.writeBytes(fileData, 0, fileData.length);
fileStream.close();
trace("The AIR file is written.");
}
有关详细信息,请参阅:
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