If I change a property of a UIControl in a callback do I still need to call setappdata before exiting?
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Eugene Davis
am 30 Jul. 2018
Kommentiert: Eugene Davis
am 30 Jul. 2018
I start my call back with
handles = getappdata(gcf,'handles');
So I have created a local copy of the handles structure.
Then I modify a control with
set(handles.Batch,'value',1);
Since handles.batch is a handle, don't I automatically change its properties without having to call
setappdata(gcf,'handles',handles);
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Walter Roberson
am 30 Jul. 2018
Correct, you only have to call setappdata() if you modify the structure itself.
Note: it is more common to use guidata() to manage a handles structure. It does the same thing as setappdata() of a property named UsedByGUIData_m, but people are more accustomed to reading guidata()
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