Under Mac OS X similar to the Windows message handler

 
void secondsLatterProcessEvents (unsigned int time) 
{
MSG msg; 
while (true) 
{
while (PeekMessage (& msg, NULL, 0, 0, PM_REMOVE)) 
{TranslateMessage (& msg); 
DispatchMessage (& msg); 
} 
sleep (100); 
time - = 100; 
if (time <= 0) break; 
} 
} 

How compiler environment under Mac Xcode same function, that is, for a process, the pause for some time, but does not affect message processing threads. .
Reply:
windows message handler less likely. . . Less contact.

If you want to pop up a message box on the mac os, there are two methods that comes

UIActionSheet: (ask box: OK, Cancel) using
same warning box (below that)UIAlertView * a = [[UIAlertView alloc] initWithTitle: (NSString *) title
message: (NSString *) message
delegate: self
cancelButtonTitle: (NSString *) cancelButtonTitle
otherButtonTitles: nil];
[A show];
[A release];
Reply:
no body!
Reply:
runloop