iOS应用程序的生命周期
- - (BOOL)application:(UIApplication *)application willFinishLaunchingWithOptions:(NSDictionary *)launchOptions
- {
- NSLog(@"①告诉代理进程启动但还没进入状态保存");
- return YES;
- }
- - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
- {
- self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
- NSLog(@"②告诉代理启动基本完成程序准备开始运行");
- // Override point for customization after application launch.
- self.window.backgroundColor = [UIColor whiteColor];
- [self.window makeKeyAndVisible];
- 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(@"③当应用程序将要入非活动状态执行,在此期间,应用程序不接收消息或事件,比如来电话");
- }
- - (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(@"④当应用程序进入活动状态执行");
- }
- - (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(@"⑤当程序被推送到后台的时候调用");
- [application beginBackgroundTaskWithExpirationHandler:^{
- NSLog(@"begin Background Task With Expiration Handler");
- }];
- }
- - (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(@"⑥当程序从后台将要重新回到前台时候调用");
- }
- - (void)applicationWillTerminate:(UIApplication *)application
- {
- // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
- NSLog(@"⑦当程序将要退出是被调用");
- }
- - (void)applicationDidFinishLaunching:(UIApplication *)application
- {
- NSLog(@"⑧当程序载入后执行");
- }
- [application beginBackgroundTaskWithExpirationHandler:^{
- NSLog(@"begin Background Task With Expiration Handler");
- }];
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