how to interrupt a while loop??

Question

IPSAS 2012-6-6

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/40387-how-to-interrupt-a-while-loop

评论： Danilo Teran 2017-5-10

in GUI, I try to interrupt a while loop...let's say.. a program initiate while loop when button A are pushed, and i want to stop/interupt the loop by pushing button B.. any idea????

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2012-6-6

3
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/40387-how-to-interrupt-a-while-loop#answer_50049

在 MATLAB Online 中打开

You cannot do that.

The closest you can get is to have button B set a variable in a place that the code in button A can reach, with that code checking the value periodically. For example,

Button B:

set(handles.buttonA, 'UserData', 'stop');

Button A:

set(handles.buttonA, 'Userdata', []);
while ....
   curval = get(handles.buttonA, 'UserData');
   if ~isempty(curval) && strcmp(curval, 'stop')
    break;
  end
 ....
 end

4 个评论
显示 2更早的评论隐藏 2更早的评论

Image Analyst 2013-4-13

Walter might want to add this to the FAQ. It's useful and asked fairly often, but I don't think it's on there yet. By the way, you can also do it with a checkbox. Button A makes the "Finish Now" checkbox become visible and clears it. When the user checks the box, the loop will "break" because it gets the checkbox value and checks to see if it's checked.

Danilo Teran 2017-5-10