iOS開發-生命週期

應用生命週期

首次啟動Not running→Inactive→Active

呼叫didFinishLaunchingWithOptions，applicationDidBecomeActive

應用結束Active → Inactive → Background→Suspended→Not running

呼叫applicationWillResignActive，applicationDidEnterBackground，applicationWillTerminate

應用重新執行Suspended → Background → Inactive → Active

呼叫applicationWillEnterForeground，applicationDidBecomeActive

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    NSLog(@"%@",@"didFinishLaunchingWithOptions");
    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(@"%@",@"applicationWillResignActive");
}

- (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(@"%@",@"applicationDidEnterBackground");
}

- (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(@"%@",@"applicationWillEnterForeground");
}

- (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(@"%@",@"applicationDidBecomeActive");
}

- (void)applicationWillTerminate:(UIApplication *)application {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
    NSLog(@"%@",@"applicationWillTerminate");
}

檢視生命週期

// 檢視建立
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    NSLog(@"%@",@"viewDidLoad");
}
// 檢視即將可見
- (void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    NSLog(@"%@",@"viewWillAppear");
}
// 檢視已經可見
- (void)viewDidAppear:(BOOL)animated{
    [super viewDidAppear:animated];
    NSLog(@"%@",@"viewDidAppear");
}
// 檢視即將不可見
- (void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    NSLog(@"%@",@"viewWillDisappear");
}
// 檢視已經不可見
- (void)viewDidDisappear:(BOOL)animated{
    [super viewDidDisappear:animated];
    NSLog(@"%@",@"viewDidDisappear");
}
// 低記憶體警告
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
    NSLog(@"%@",@"didReceiveMemoryWarning");
}
// 檢視銷燬
- (void)viewDidUnload{
    [super viewDidUnload];
    NSLog(@"%@",@"viewDidUnload");
}