Re: NSTimer +timerWithTimeInterval:
Re: NSTimer +timerWithTimeInterval:
- Subject: Re: NSTimer +timerWithTimeInterval:
- From: Alex Zavatone via Cocoa-dev <email@hidden>
- Date: Wed, 29 Apr 2020 16:31:15 -0500
Just ot be safe, reboot your Mac to make sure that things aren’t completely
borked. I’ve had to do this many times.
> On Apr 29, 2020, at 4:26 PM, Carl Hoefs <email@hidden>
> wrote:
>
> I accept that NSTimer works as documented! But I allege there must be
> something odd about my (inherited) project that I can't quite put my finger
> on.
>
> Perhaps the +timerWithTimeInterval: method is overridden...
> -Carl
>
>
>> On Apr 29, 2020, at 2:15 PM, Alex Zavatone <email@hidden
>> <mailto:email@hidden>> wrote:
>>
>> I used your code in an iOS project and it works as expected.
>>
>> 2020-04-29 16:14:02.254107-0500 Timer[83275:13268128] Wed Apr 29 16:14:02
>> 2020
>> 2020-04-29 16:14:03.254048-0500 Timer[83275:13268128] Wed Apr 29 16:14:03
>> 2020
>> 2020-04-29 16:14:04.253957-0500 Timer[83275:13268128] Wed Apr 29 16:14:04
>> 2020
>> 2020-04-29 16:14:05.254170-0500 Timer[83275:13268128] Wed Apr 29 16:14:05
>> 2020
>> 2020-04-29 16:14:06.254490-0500 Timer[83275:13268128] Wed Apr 29 16:14:06
>> 2020
>> 2020-04-29 16:14:07.254570-0500 Timer[83275:13268128] Wed Apr 29 16:14:07
>> 2020
>> 2020-04-29 16:14:08.254651-0500 Timer[83275:13268128] Wed Apr 29 16:14:08
>> 2020
>> 2020-04-29 16:14:09.253715-0500 Timer[83275:13268128] Wed Apr 29 16:14:09
>> 2020
>> 2020-04-29 16:14:10.254741-0500 Timer[83275:13268128] Wed Apr 29 16:14:10
>> 2020
>>
>> I’ll mail you the project offlist.
>>
>>
>>
>>> On Apr 29, 2020, at 4:07 PM, Carl Hoefs via Cocoa-dev
>>> <email@hidden <mailto:email@hidden>> wrote:
>>>
>>> On Apr 29, 2020, at 1:53 PM, Carl Hoefs via Cocoa-dev
>>> <email@hidden <mailto:email@hidden>> wrote:
>>>>
>>>> On Apr 29, 2020, at 1:43 PM, Steve Mills via Cocoa-dev
>>>> <email@hidden <mailto:email@hidden>
>>>> <mailto:email@hidden <mailto:email@hidden>>>
>>>> wrote:
>>>>>
>>>>> On Apr 29, 2020, at 15:36:23, Carl Hoefs via Cocoa-dev
>>>>> <email@hidden <mailto: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];
>>>>>
>>>>> Sounds like multiple timers are being installed. Set a breakpoint that
>>>>> logs when hit.
>>>>>
>>>>
>>>> On break, It's always the same timer. This is with time interval set to
>>>> 20.0:
>>>>
>>>> <timer id> <interval> <fire date>
>>>> <__NSCFTimer: 0x60000323c600> 1.000000 Wed Apr 29 13:50:40 2020
>>>> <__NSCFTimer: 0x60000323c600> 1.000000 Wed Apr 29 13:50:41 2020
>>>> <__NSCFTimer: 0x60000323c600> 1.000000 Wed Apr 29 13:50:42 2020
>>>> . . .
>>>>
>>>
>>> I put a break directly after the creation of the timer, and introspection
>>> already shows the wrong value for the time interval! And since
>>> .timeInterval is a readonly attribute, I cannot force it to the correct
>>> value, nor is there a -setTimeInterval: method.
>>>
>>> Argh...
>>> -Carl
>>>
>>>
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