% Button pushed function: GotoApp2Button
function GotoApp2ButtonPushed(app, event)
app.app1handle = findall(0, 'Name', 'MyApp'); % MyApp is the App's fig name
app2handle = app2;
app2handle.app1handle = app.app1handle;
end
findall will return the UIFigure, not the app object. The UIFigure doesn't have a 'UIAxes' field (the app does), so that's the reason for the error.
Rather than doing what you're trying to do there, pass app1 (the entire app object) as an argument to app2. This way, any code in app2 that needs information from app1 can access it (because you store app1 as a property of app2).
This requires adding an input argument to app2 (which can be done by clicking the "App Input Arguments" button in the App Designer toolstrip when app2 is the active app in App Designer); you can call the new input argument "app1".
Then, the GotoApp2ButtonPushed function can simply be:
% Button pushed function: GotoApp2Button
function GotoApp2ButtonPushed(app, event)
app2(app); % call app2 with this app (app1) as an input argument
end
And app2's startupFcn becomes:
% Code that executes after component creation
function startupFcn(app, app1)
app.x = evalin('base','x');
app.y = evalin('base','y');
app.app1handle = app1; % store app1 as a property of this app (app2)
end
Note the new second input there, which is app1.
I've made those changes and the mlapp files are attached. It seems to work as intended now.
