Aggiornamento: Le code di invio rendono molto semplice la pubblicazione di una notifica sul thread principale.
dispatch_async(dispatch_get_main_queue(),^{
[[NSNotificationCenter defaultCenter] postNotification...];
});
di aspettare per i gestori di notifica per finire, basta sostituire dispatch_async con dispatch_sync.
seguito la risposta di notnoop, ecco alcune infrastrutture è possibile utilizzare per inviare in modo sicuro le notifiche sul thread principale senza attesa di loro alla fine. Spero che qualcuno lo troverà utile!
NSNotificationCenter + Utils.h:
@interface NSNotificationCenter (Utils)
-(void)postNotificationOnMainThread:(NSNotification *)notification;
-(void)postNotificationNameOnMainThread:(NSString *)aName object:(id)anObject;
-(void)postNotificationNameOnMainThread:(NSString *)aName object:(id)anObject userInfo:(NSDictionary *)aUserInfo;
@end
NSNotificationCenter + Utils.m:
@interface NSNotificationCenter (Utils_Impl) {
}
-(void)postNotificationOnMainThreadImpl:(NSNotification*)notification;
-(void)postNotificationNameOnMainThreadImpl:(NSString *)aName object:(id)anObject userInfo:(NSDictionary *)aUserInfo;
@end
@implementation NSNotificationCenter (Utils)
-(void)postNotificationOnMainThread:(NSNotification *)notification {
[notification retain];
[notification.object retain];
[self performSelectorOnMainThread:@selector(postNotificationOnMainThreadImpl:)
withObject:notification
waitUntilDone:NO];
}
-(void)postNotificationNameOnMainThread:(NSString *)aName object:(id)anObject {
[self postNotificationNameOnMainThread:aName object:anObject userInfo:nil];
}
-(void)postNotificationNameOnMainThread:(NSString *)aName object:(id)anObject userInfo:(NSDictionary *)aUserInfo {
[aName retain];
[anObject retain];
[aUserInfo retain];
SEL sel = @selector(postNotificationNameOnMainThreadImpl:object:userInfo:);
NSMethodSignature* sig = [self methodSignatureForSelector:sel];
NSInvocation* invocation = [NSInvocation invocationWithMethodSignature:sig];
[invocation setTarget:self];
[invocation setSelector:sel];
[invocation setArgument:&aName atIndex:2];
[invocation setArgument:&anObject atIndex:3];
[invocation setArgument:&aUserInfo atIndex:4];
[invocation invokeOnMainThreadWaitUntilDone:NO];
}
@end
@implementation NSNotificationCenter (Utils_Impl)
-(void)postNotificationOnMainThreadImpl:(NSNotification*)notification {
[self postNotification:notification];
[notification.object release];
[notification release];
}
-(void)postNotificationNameOnMainThreadImpl:(NSString *)aName object:(id)anObject userInfo:(NSDictionary *)aUserInfo {
[self postNotificationName:aName object:anObject userInfo:aUserInfo];
[aName release];
[anObject release];
[aUserInfo release];
}
@end
NSInvocation + Utils.h:
@interface NSInvocation (Utils)
-(void)invokeOnMainThreadWaitUntilDone:(BOOL)wait;
@end
NSInvocation + Utils.m:
@implementation NSInvocation (Utils)
-(void)invokeOnMainThreadWaitUntilDone:(BOOL)wait
{
[self performSelectorOnMainThread:@selector(invoke)
withObject:nil
waitUntilDone:wait];
}
@end
Se si utilizza il tag "iPhone", il richiedente non è probabilmente il 10.6. –
Hai ragione, Alex. Che stupido. – Yuji
grazie per il suggerimento. –