Я использовал addObserver
в viewDidLoad:
и removeObserver
в dealloc:
. Код:
- (void)viewDidLoad
{
[super viewDidLoad];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(refreshData)
name:AnyNotification
object:nil];
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self
name:AnyNotification
object:nil];
}
Но, согласно некоторым статьям, лучше addObserver
в viewDidAppear:
и removeObserver
в viewDidDisappear:
. Код:
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(refreshData)
name:AnyNotification
object:nil];
}
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:AnyNotification
object:nil];
}
Итак, какой лучший способ добавитьObserver/removeObserver?