App that opens new uifigure with zoom function stops responding occasionally

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Shao-Yu Wang
Shao-Yu Wang 2022-6-10
评论： Shao-Yu Wang 2022-6-13
I built an app in App Designer that allows users to select a range of data in the plot with the zoom function, then returns the trimmed data back to the main app. At first it works fine, but if I call this selectSignalRange function for a few more times by clicking the button, sometimes it just stops responding with no error message. It's not greyed out completely, but nothing happens when you click a button in the app or editor window. You can't even close the window. When this happens the only option is to force quit Matlab completely and start over. I'm quite sure it's not a bug from my code, but how do I make the code stable?
The main app:
~
~
function TrimsignalButtonPushed(app, event)
[app.simSignal, app.signalRange] = selectSignalRange(~~~);
drawnow; pause(0.05); % I read from the internet that this line helps prevent crashes
end
~
~
The function:
function [simSignal, range] = selectSignalRange(simSignal, range)
fig = uifigure; % opens new uifigure window
ax = uiaxes(fig);
drawnow; pause(0.05);
plotSignalinUI;
zoom(ax,'on')
% Create push buttons
uibutton(fig,'push',...
'ButtonPushedFcn', @(~,~)simTrimBtnPushed);
uibutton(fig,'push',...
'ButtonPushedFcn', @(~,~)finishBtnPushed);
uiwait(fig); % To prevent outputs until finish button pushed
function simTrimBtnPushed
range.sim = get(ax,'XLim');
simSignal = ~~~; % Edit this variable
~
~
plotSignalinUI;
drawnow; pause(0.05);
end
function finishBtnPushed
close(fig)
end
function plotSignalinUI
plot(~~~) % Plots stuff in the window
end
end

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