[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationWillResignActive:)

name:UIApplicationWillResignActiveNotification object:nil]; //監(jiān)聽是否觸發(fā)home鍵掛起程序.

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationDidBecomeActive:)

name:UIApplicationDidBecomeActiveNotification object:nil]; //監(jiān)聽是否重新進(jìn)入程序程序.

- (void)applicationWillResignActive:(NSNotification *)notification

{

printf("按理說是觸發(fā)home按下\n");

}

- (void)applicationDidBecomeActive:(NSNotification *)notification

{

printf("按理說是重新進(jìn)來后響應(yīng)\n");

[NSTimer scheduledTimerWithTimeInterval:10.0f target:self selector:@selector(dismissKeyHUD) userInfo:nil repeats:NO];

}