How can i stop the loop iteration using pushbutton callback in MATLAB GUI?

Question

VBBV 2018-11-27

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评论： Roche de Guzman 2021-1-20

I have GUI which has pushbutton to stop the for loop iteration. the code structure for stop button callback is follows

g = 1
handles.g = g
guidata(hObject,handles) 

When i press the button, it sets the value of g = 1;

In the iteration loop, i have passed the updated value of g using

g = handles.g

and issuing a condition to stop the loop iterations

if g == 1
return
end 

however, the iteration loop does not stop, since the value of g resets to 0

why does this happen ?

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Answer 1

Image Analyst 2018-11-28

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I have a very small demo that does exactly that. It start counting, then when you press stop, it stops counting and updating the text label on the GUI. Then when you press Go, it starts counting and updating the label again.

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Roche de Guzman 2021-1-20

TestStartStop.mlapp

I tried doing a similar process in MATLAB app but the changing of user data to true (1) only happens after the iteration (on queue). I have attached the mlapp file.

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Answer 2

YT 2018-11-28

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If you want to stop your iteration (for/while loop), you could try break instead of return.

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VBBV 2018-11-28

编辑：VBBV 2018-11-28

yes, i have tried that as well. still it does not stop. because it does not enter the if loop, since the value of g resets to 0. why does this happen ?

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