uisetcolor figure goes blank

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Tek 2023-10-11

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https://ww2.mathworks.cn/matlabcentral/answers/2031914-uisetcolor-figure-goes-blank

编辑： Tek 2023-10-11

I have a veirg bug considering the uisetcolor function. I am using this function in a callback of my appdesigner app and for the first time uisetcolor is called it works fine. But after the first call, whenever the uisetcolor function is called it creates a blank figure with a title "Color" and nothing else. Weird thing, if I call the uisetcolor repeatedly (around 4 5 times changes everytime) it works once and then again becomes blank in further calls. I am using 2019a version (without updates due to offline computer) on Windows 10.

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Adam Danz 2023-10-11

Please share the line where you're calling uisetcolor or give let us know if you are using any inputs.

Tek 2023-10-11

编辑：Tek 2023-10-11

First I have used it without any input but since blank screen only have option to close and without any input function doesn't return any value, I have decided to use it with previous color o f the button. The code snippet:

function results = ColorPicker(app, buttonnumber) %I have several buttons that I will use same color pick function

PickedColor = uisetcolor(ColorArray(buttonnumber, :)); % The different colors of the buttons are stored in rows of ColorArray as R G B triplets

ColorArray(buttonnumber, :) = PickedColor;

results = now;

end

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