Flash ios Apps Cookbook学习整理(一)

1. 设置应用程序休眠状态

通过NativeApplication.nativeApplication可以得到应用程序的实例，这是一个单例模式的引用

设置nativeApplication.systemIdleMode来指定当休眠时间到来时应用程序的状态

systemIdleMode有两个值:SystemIdleMode.NORMAL(默认)与SystemIdleMode.KEEP_AWAKE(保持唤醒)

var application:NativeApplication = NativeApplication.nativeApplication;
application.systemIdleMode = SystemIdleMode.KEEP_AWAKE;

还有一种灵活的方法，是监听应用程序的Event.ACTIVATE和Event.DEACTIVATE事件，当程序被激活时，设置休眠状态为KEEP_AWAKE(保持唤醒);当程序未激活时(后台运行)，设置休眠状态为NORMAL

package  
{
    import flash.desktop.NativeApplication;
    import flash.desktop.SystemIdleMode;
    import flash.display.MovieClip;
    import flash.events.Event;

    public class Main extends MovieClip 
    {
        private var application:NativeApplication;
        
        public function Main() 
        {
            application = NativeApplication.nativeApplication;
            application.addEventListener(Event.ACTIVATE,activateHandler);
            application.addEventListener(Event.DEACTIVATE,deactivateHandler);
        }
        
        private function activateHandler(event:Event):void
        {
            application.systemIdleMode = SystemIdleMode.KEEP_AWAKE;
        }
        
        private function deactivateHandler(event:Event):void
        {
            application.systemIdleMode = SystemIdleMode.NORMAL;
        }
    }
}

2. 应用程序关闭事件

package  
{
    import flash.desktop.NativeApplication;
    import flash.desktop.SystemIdleMode;
    import flash.display.MovieClip;
    import flash.events.Event;

    public class Main extends MovieClip 
    {
        private var application:NativeApplication;
        
        public function Main() 
        {
            application = NativeApplication.nativeApplication;
            application.addEventListener(Event.EXITING,exitingHandler);
        }
        
        private function exitingHandler(event:Event):void
        {
            application.removeEventListener(Event.EXITING,exitingHandler);
            application.systemIdleMode = SystemIdleMode.NORMAL;
        }
    }
}