Predefine UI components (App Designer)

Hello,

I am making an app which generates all the components depending on an Excel-File.

It does work and the App is running, but Matlab keeps giving me the warning, that predefining the Components would be more efficent, because they're expanding in a loop.

One example for all the Switches I generate is below.

Commands like zeros(..) do not work, because afterwards the code doesn't work because of dot indexing ore something like that.

I hope that predefining the Components would be better for the performance for my app, but I don't know how..

I hope someone can help me - thank you very much!

Code example:

for i = 1:length(allKeysOne)   %For Loop to create the Check Boxes
                j = (ContPos(ContType(allKeysOne(i))));
                %%% Label %%%
                UniSwLabel(i) = uilabel(Tabs(TabNames(ContType(allKeysOne(i)))));  %Creating a CheckBox
                UniSwLabel(i).HorizontalAlignment = 'center';
                UniSwLabel(i).FontSize = 14;
                UniSwLabel(i).FontWeight = 'bold';
                UniSwLabel(i).Text = allKeysOne(i); %Giving the CheckBox it's Text
                ContSwNr(allKeysOne(i)) = i;
                
                %%% Components %%%
                UniSw(i) = uiswitch(Tabs(TabNames(ContType(allKeysOne(i)))), 'slider');
                UniSw(i).ValueChangedFcn = @app.switchswitched;  %Callback function
                UniSw(i).FontSize = 16;
                UniSw(i).Tag = allKeysOne(i);
                UniSw(i).FontWeight = 'bold';
                %%% ....%%%
end