In App Designer I'm having trouble assigning a function handle to TimerFcn.

18 views (last 30 days)
I'm kind of a newby with App Designer and having trouble assigning a function handle to TimerFcn.
I know the Timer is set up properly because the line:
app.myTimer.TimerFcn = @(~,~)disp('do something'); works fine.
But when I use:
app.myTimer.TimerFcn = @Timer_func; I get "Undefined function 'Timer_func' for input arguments of type 'timer' ".
But the function is in fact defined:
methods (Access = private)
function Timer_func(app)
if app.tval == "Green"
app.tval = 'Red';
elseif app.tval == "Red"
app.tval = 'Green';
end
app.TimerLamp.Value = app.tval;
end
end

Accepted Answer

Greg
Greg on 30 Nov 2018
Edited: Greg on 30 Nov 2018
You missed the second half of the error message: "Undefined function 'Timer_func' for input arguments of type 'timer'." Apps in AppDesigner are classdefs, meaning the app is a class. When you define a method inside the .MLAPP file, you've defined it for "input arguments of type [your app]," which means variables like timers can't see that function. Move Timer_func out of the .MLAPP into its own .M or .MLX file on your MATLAB path.
Or, since you appear to need app itself inside the timer callback, use
@(~,~) Timer_func(app)

More Answers (0)

Categories

Find more on Develop Apps Using App Designer in Help Center and File Exchange

Tags

Products


Release

R2018b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!