如果要在APP从后台切换到前台的后执行一些任务应该在以下哪个方法中执行？
- (BOOL)application:(UIApplication *)application<br>didFinishLaunchingWithOptions:(nullable NSDictionary *)launchOptions
- (void)applicationWillResignActive:(UIApplication *)application
- (void)applicationDidBecomeActive:(UIApplication *)application
- (void)viewWillAppear:(BOOL)animated
