Solved: I didn't know how to use NSInvocation correctly.
I had to add calls to -[NSInvocation setSelector:] and -[NSInvocation
setTarget:] before I put it in the NSTimer. Worked great after it knew what
message it needed to send and where to send it. *blush*
Thanks for the replies that got me digging in the right direction, though.
-----Original Message-----
From: cocoa-dev-bounces+tophu=email@hidden
[mailto:cocoa-dev-bounces+tophu=email@hidden] On Behalf Of
Christopher Hickman
Sent: Wednesday, August 31, 2005 2:39 PM
To: Cocoa Mailing List
Subject: NSTimer
Hi folks,
I have an NSTimer that I'm trying to use to periodicly call a method.
The
timer gets created, but it doesn't call my method when it fires. Here's
my code, do you see anything wrong?
-(void)incrementProgressIndicator;
{
NSLog(@"incrementProgressIndicator"); //Never logs
//progressIndicator is an NSProgressIndicator IBOutlet of this
object
//incrementAmount is a double ivar with a written accessor
if (progressIndicator != nil) {[progressIndicator incrementBy:[self
incrementAmount]];}
}
-(void)incrementProgressIndicatorEveryTimeInterval:
(NSTimeInterval)seconds iterations:(int)iterations;
{
NSLog(@"incrementProgressIndicatorEveryTimeInterval: %f iterations:
%i", seconds, iterations);
NSTimer *incrementerTimer;
NSInvocation *incrementerInvocation;
incrementerInvocation = [NSInvocation invocationWithMethodSignature:
[self
methodSignatureForSelector:@selector(incrementProgressIndicator)]];
incrementerTimer = [NSTimer scheduledTimerWithTimeInterval:seconds
invocation:incrementerInvocation
repeats:YES];
//incrementerTimer needs to be invalidated after it fires
(iterations)
times, so we set up a
//second timer to wait (seconds * iterations) seconds and invalidate
the original timer
[NSTimer scheduledTimerWithTimeInterval:(seconds*iterations)
invocation:[NSInvocation
invocationWithMethodSignature:
[incrementerTimer
methodSignatureForSelector:@selector(invalidate)]]
repeats:NO];
}
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References:
>NSTimer (From: Christopher Hickman <email@hidden>)
