Error in Timer function

Question

Karthik KJ 2012-7-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/43544-error-in-timer-function

Hi I am just testing how Timer function works in GUI. I have an older script from google search.

Basically i have created an timer and when the gui opens it should update the edit box with an random number.

function figure1_CreateFcn(hObject, eventdata, handles)

handles.guifig = gcf
handles.tmr = timer('TimerFcn',... 
{@TmrFcn,handles.guifig},'BusyMode','Queue',...
  'ExecutionMode','FixedRate','Period',2);%timer updating after every 2 secs
guidata(handles.guifig,handles);
start(handles.tmr);
guidata(hObject, handles);
%Timer Function

function TmrFcn(src,event,handles) %Timer function

handles = guidata(handles)
x = rand%define your function here 
set(handles.edit1,'value',num2str(x));
guidata(handles.guifig, handles);

Im getting error ' Reference to non-existent field 'edit1'.

Can any one help me in solving this.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

TAB 2012-7-13

Karthik, please format your code. See markup help.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2012-7-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/43544-error-in-timer-function#answer_53426

In GUIDE, look at the "Tag" property of the edit fields on your GUI. You don't have any that have the "tag" of "edit1".

2 个评论
显示无隐藏无

Karthik KJ 2012-7-13

I have checked no issue with the tag property. Sorry I forgot to add the full error

??? Error while evaluating TimerFcn for timer 'timer-17'

Reference to non-existent field 'edit1'.

Image Analyst 2012-7-14

编辑：Image Analyst 2012-7-14

Same answer. See where it says "Reference to non-existent field 'edit1'." The variable "handles" exists but it has no field called edit1. That means you don't have a control on your GUI called edit1, just like I first said. Look again at the tag property of all your edit fields on your GUI.

请先登录，再进行评论。

Answer 2

Sean de Wolski 2012-7-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/43544-error-in-timer-function#answer_53438

编辑：Sean de Wolski 2012-7-13

在 MATLAB Online 中打开

Is this occuring because you close the GUI without stopping the timer?

In the closeRequestFcn of the GUI, be sure to have a:

t = timerfindall;
is ~isempty(t)
  stop(t);
  delete(t);
end

2 个评论
显示无隐藏无

Sean de Wolski 2012-7-13

Nevermind. Probably not the case because the field doesn't exist. You would get an error "invalid or deleted object" here I would think.

Image Analyst 2012-7-14

编辑：Image Analyst 2012-7-14

I agree with Sean - and the field does not exist because the edit text box called "edit1" (meaning the tag property = edit1) simply does not exist on the GUI.

请先登录，再进行评论。