Re: NSTimer +timerWithTimeInterval:
Re: NSTimer +timerWithTimeInterval:
- Subject: Re: NSTimer +timerWithTimeInterval:
- From: Alex Zavatone via Cocoa-dev <email@hidden>
- Date: Wed, 29 Apr 2020 15:38:47 -0500
Are you ever removing your timers?
Quit Xcode, reload the project and see if the same thing happens.
> On Apr 29, 2020, at 3:36 PM, Carl Hoefs via Cocoa-dev
> <email@hidden> wrote:
>
> When I issue NSTimer's +timerWithTimeInterval::::: method, I'm getting
> unexpected timer firing times (20X faster than expected).
>
> ∙ If I specify 1.0 for the time interval, my method gets called 20 times/sec.
> ∙ If I specify 20.0 for the time interval, my method gets called 1 time/sec.
> ∙ If I specify 100.0 for the time interval, my method gets called 5 times/sec.
> ...etc.
>
> Here is my only invocation, called once and nevermore:
>
> NSTimer *newTimer = [NSTimer timerWithTimeInterval:1.0 // should be
> 1/sec
> target:self
> selector:@selector(newData:)
> userInfo:nil
> repeats:YES];
> [[NSRunLoop mainRunLoop] addTimer:newTimer
> forMode:NSRunLoopCommonModes];
>
> How can this be? NSTimeInterval is supposed to be in seconds!
>
> From the Apple documentation:
>
> + (NSTimer
> <https://developer.apple.com/documentation/foundation/nstimer?language=objc>
> *)timerWithTimeInterval:(NSTimeInterval
> <https://developer.apple.com/documentation/foundation/nstimeinterval?language=objc>)ti
>
> target:(id)aTarget
> selector:(SEL)aSelector
> userInfo:(id)userInfo
> repeats:(BOOL)yesOrNo;
> Parameters
> ti
> The number of seconds between firings of the timer. If ti is less than or
> equal to 0.0, this method chooses the nonnegative value of 0.0001 seconds
> instead. A NSTimeInterval value is always specified in seconds; it yields
> sub-millisecond precision over a range of 10,000 years.
>
> I can accommodate this odd behavior in my code, but something's gotta be
> wrong...
> -Carl
>
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