timer never stop!

Question

Kyungsun Ha 2017-3-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/329757-timer-never-stop

编辑： Jan 2017-3-14

 function timecount(~)
sec=input('얼마나 세야 하는거냐?');
t = timer('TimerFcn', 'stat=false; disp(''땡!'')','StartDelay',sec); 
    start(t) 
        stat=true; 
        b=sec;
        a=0;
        min=0;
        hour=0;
        while(stat==true) 
            b=b-1;
            a=a+1;
                if a>=60
                a=a-60;
                min=min+1;
                end
                if min>=60
                    min=min-60;
                    hour=hour+1;
                end
            if min==0
            fprintf('%s초 \n', num2str(a));
            elseif hour==0
            fprintf('%s분 \n', num2str(min));
            fprintf('%s초 \n', num2str(a));
            else
            fprintf('%s시간 \n', num2str(hour));
            fprintf('%s분 \n', num2str(min));
            fprintf('%s초 \n', num2str(a));
            end
         pause(1) 
         if sec == 0;
             stop(t)
             delete(t)
         end
        end
end

this is whole code of timer.. Input is second that you want to count(ex : 10sec).. when you input 10sec, this function will end after 10sec. but it's not stop and run infinity...

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Answer 1

Jan 2017-3-14

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/329757-timer-never-stop#answer_258631

编辑：Jan 2017-3-14

在 MATLAB Online 中打开

When you define the timer's callback as a string, it is evaluatred in the base workspace. Therefore you cannot observe changes in the variable |stat|inside the show function. Better use a flag which is "attached" to the timer, e.g. its UserData:

t = timer('TimerFcn', @myTimerCB, 'StartDelay', sec, 'UserData', 0);
start(t)
...
while get(t, 'UserData') == 0
  ...
end
...
function mytimerCB(TimerH, EventData)
set(TimerH, 'UserData', 1);
end