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问题描述
我正在尝试编写一个脚本，以在指定的时间间隔内获取用户输入.我写了一个简单的脚本，如下所示:
I'm trying to write a script which gets user input for a specified time interval. I wrote a simple script as below:
timeEllapsed=0;
Count=0;
while 1
tic
input('press enter');
timeEllapsed=timeEllapsed+toc;
Count=Count+1;
if(timeEllapsed>5)
break;
end
end
disp ('result is:')
disp(Count)
第一次输入和最后一次输入之间的时间少于5秒时，此脚本将获得用户输入.但是，如果用户未按预期输入任何输入，则此脚本将无限期等待.有什么办法可以在给定的时间间隔内获得用户输入吗?预先感谢！
This script gets user input, when the time between first and last input less than 5 seconds. But this script waits indefinitely if user doesn't enter any input as expected. Is there any way to get user input for exactly given time interval?Thanks in advance!
推荐答案
这是一个自包含的解决方案...
This is a self contained solution...
function output = timeinput(t,default_string)
% TIMEINPUT
% Input arguments:
% t - time delay
% default_string - string which is returned if nothing is entered
%
% Examples:
% If a string is expected
% x = timeinput(20,'no input')
% If a number is expected
% x = str2num(timeinput(20,'1'))
%
if nargin == 1
default_string = '';
end
% Creating a figure
h = figure('CloseRequestFcn','','Position',[500 500 200 50],'MenuBar','none',...
'NumberTitle','off','Name','Please insert...');
% Creating an Edit field
hedit = uicontrol('style','edit','Units','pixels','Position',[10 15 180 20],'callback','uiresume','string',default_string);
% Defining a Timer object
T = timer('Name','mm', ...
'TimerFcn','uiresume', ...
'StartDelay',t, ...
'ExecutionMode','singleShot');
% Starting the timer
start(T)
uiwait(h)
% Defining the return value
output = get(hedit,'String');
% Deleting the figure
delete(h)
% Stopping and Deleting the timer
stop(T)
delete(T)
要运行5秒钟的超时输入，只需输入:
To run a 5 seconds timeout input, just write:
x = timeinput(5,'no input')
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