Problem with my Callback function or handles values

2 次查看（过去 30 天）
Nimrodb
Nimrodb 2013-3-3
Hi everybody, I have a problem with my function and I do not understand why.
Here is some part of my code:
handles.STANumber = 1;
handles.PanelPosition = [60 670 1098 80];
handles.AddSTA = uicontrol( 'Parent',handles.MainFigure,...
'style','pushbutton',...
'String','Add STA',...
'Tag','AddSTA',...
'Callback', {@AddSTA,handles});
handles.STANumber = handles.STANumber + 1;
....
function [handles] = AddSTA(hObject,eventdata,handles)
handles.AddSTA = hObject; % I DO NOT KNOW WHY THIS IS NEEDED. without this
% handles.AddSTA is not recognized - but all the
% other handles are recognized
handles.STANumber = handles.STANumber + 1;
My main problems are:
1. When I enter the AddSTA function the handles structure does not have AddSTA field
2. Every time I enter the AddSTA function - handles.STANumber is '1' (even though I prev' increased it) - On the same not - handles.PanelPosition is also in his default value.

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回答（1 个）

Brian B
Brian B 2013-3-3
编辑：Brian B 2013-3-3
You need to save handles back to the figure after each call, as in:
handles.STANumber = handles.STAumber + 1;
guidata(hObject,handles);
See http://www.mathworks.com/help/matlab/ref/guidata.html.
  2 个评论
Nimrodb
Nimrodb 2013-3-3
I tried that already. I places 1 in my main function (at the end) and got the folloiwng error:
Reference to a cleared variable hObject.
Error in SimulationMain (line 28)
guidata(hObject,handles);
and I also tried to place 1 at the end of the AddSTA function and that did not produce an error - but also did not do anything.

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