標籤：
為了處理好應用程式的掛起、暫停等情況下的資料儲存，或對應添加所需處理，我們必須瞭解ios生命週期。
但是不要去背去記，做個實驗就好。
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
NSLog(@"程式開始");
return YES;
}
- (void)applicationWillResignActive:(UIApplication *)application
{
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
NSLog(@"程式暫停");
}
- (void)applicationDidEnterBackground:(UIApplication *)application
{
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
NSLog(@"程式進入後台");
}
- (void)applicationWillEnterForeground:(UIApplication *)application
{
// Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
NSLog(@"程式進入前台");
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
NSLog(@"程式再次啟用");
}
- (void)applicationWillTerminate:(UIApplication *)application
{
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
NSLog(@"程式意外終止");
}
實驗結果：
1.初次開機應用程式：
2012-06-26 11:06:39.313 WQTest[485:17903] 程式開始
2012-06-26 11:06:39.320 WQTest[485:17903] 程式再次啟用
2.摁HOME鍵退出：
2012-06-26 11:08:08.687 WQTest[485:17903] 程式暫停
2012-06-26 11:08:08.690 WQTest[485:17903] 程式進入後台
3.再次進入程式：
2012-06-26 11:09:11.047 WQTest[485:17903] 程式進入前台
2012-06-26 11:09:11.049 WQTest[485:17903] 程式再次啟用
iOS開發——生命週期
