On Dec 5, 2008, at 3:16 PM, Påhl Melin wrote:
2008/12/5 Sherm Pendley <[EMAIL PROTECTED]>:
You'd have far, far less trouble programming for the Mac if you'd
simply
learn how Cocoa works, instead of trying to reinvent .NET in
Objective-C.
When in Rome, do as the Romans do.
That's why I asked in the first place. I didn't know how Cocoa works
in regards to timers.
I understand that - and it's a good point. But consider how you asked
the question. If you don't know how Cocoa works, how is it that you've
already decided that you shouldn't use a run loop? That's putting the
cart in front of the horse, IMHO. The fact that you don't use a run
loop to build timers with some other framework doesn't imply that you
shouldn't do so when you're using Cocoa.
Unless I've missed something, you have a classic A/B situation. You
want to do task A - fire a timer event every half second, starting
five seconds from now. And based on your experience with .Net and BSD,
you've decided that method B - threading without run loops - is how
you want to do that, so you're asking for help with method B. The
problem is that the method B isn't the best match for Cocoa's way of
doing things, and actually makes task A far more difficult than it
normally would be. You need to take a step further back, and find out
how Cocoa does task A.
So, how to do task A the "Cocoa way?" Here's a simple example:
- (void)startTimer {
NSTimer * t = [NSTimer scheduledTimerWithTimeInterval: 4.5
target: self
selector: @selector(delayTimerFired:)
userInfo: nil
repeats: NO
];
}
- (void)delayTimerFired:(NSTimer *)theTimer {
// Create interval timer
NSTimer * t = [NSTimer scheduledTimerWithTimeInterval: 0.5
target: self
selector: @selector(intervalTimerFired:)
userInfo: nil
repeats: YES
];
}
- (void)intervalTimerFired:(NSTimer *)theTimer {
// do stuff every half second
}
If you want to invalidate the timer at some future point, you could do
so directly by storing a reference to it in an instance variable. Or,
you could check for some condition in -intervalTimerFired:, and send
[theTimer invalidate] if needed.
sherm--
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