TIMER still runs after deleting the variable

AA
2015 2 1
2 个回答
回答已采纳
更新时间：2015 2 14
9 次查看（30 天）

0 个投票

currentTimeSecs = rem(now,1)*24*60*60;
fireTimerAtSecs = 15*60*60;
if currentTimeSecs < fireTimerAtSecs
% timer will fire today
timerDelaySecs = fireTimerAtSecs - currentTimeSecs;
else
% timer will fire tomorrow
timerDelaySecs = (24*60*60 - currentTimeSecs) + fireTimerAtSecs;
end
T = timer('Period',120, ...
'ExecutionMode','fixedRate', ...
'StartDelay', timerDelaySecs, ...
'TimerFcn',@(src,evt)disp('hi'));
start(T);
When I run the above code and then delete the variable T then the script still continues running and executing the function disp(hi). How can I stop that? how can i stop the timer?

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 采纳的回答

Image Analyst
Image Analyst 2015-2-1

2 个投票

Check out this snippet of code that I wrote to stop all timers. Works even if you have lost the handle to some timer you started up:
%--------------------------------------------------------------------------------------------------------------------------
function StopTimer(handles)
try
fprintf('Entering StopTimer...\n');
listOfTimers = timerfindall % List all timers, just for info.
% Get handle to the one timer that we should have.
if isempty(listOfTimers)
% Exit if there is no timer to turn off.
fprintf('There are no timers to turn off. Leaving StopTimer().\n');
return;
end
handleToTimer = getappdata(handles.figMainWindow, 'timerObj');
% Stop that timer.
stop(handleToTimer);
% Delete all timers from memory.
listOfTimers = timerfindall
if ~isempty(listOfTimers)
delete(listOfTimers(:));
end
fprintf('Left StopTimer and turned off all timers.\n');
catch ME
errorMessage = sprintf('Error in StopTimer().\nThe error reported by MATLAB is:\n\n%s', ME.message);
fprintf('%s\n', errorMessage);
uiwait(warndlg(errorMessage));
end
return; % from StopTimer

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AA
AA 2015-2-14
it gives me the error that it cant find the handles variable. what is handles?
Image Analyst
Image Analyst 2015-2-14
编辑：Image Analyst 2015-2-14
This was a snippet from a GUI I had built with GUIDE. If you're not using a GUIDE GUI, you won't have handles. Just use this code:
% Delete all timers from memory.
listOfTimers = timerfindall
if ~isempty(listOfTimers)
delete(listOfTimers(:));
end
I'm not sure if you have to stop them first - I think just deleting the timer object will automatically stop it. If it doesn't then put it in a loop.

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