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我想在GUI/Matlab中使用计时器进行倒计时代码。 GUI是通过指南创建的。我的想法是有两个编辑框，其中一个框可以用ss：ms格式填充一个时间（例如50.200）。通过按下开始按钮倒计时应显示在第二个编辑框中并执行。 我现在的问题是，我可以在第二个编辑框中显示秒数而不是毫秒数。我试过sprintf - 但我认为定时器的“TasksToExecute”句柄不接受小数点数字？！有没有办法在编辑框中显示秒和毫秒？
有人可以帮忙吗？还是有人有一个想法如何解决？
谢谢。
function varargout = Countdown_test(varargin)
% COUNTDOWN_TEST MATLAB code for Countdown_test.fig
% COUNTDOWN_TEST, by itself, creates a new COUNTDOWN_TEST or raises the existing
% singleton*.
%
% H = COUNTDOWN_TEST returns the handle to a new COUNTDOWN_TEST or the handle to
% the existing singleton*.
%
% COUNTDOWN_TEST('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in COUNTDOWN_TEST.M with the given input arguments.
%
% COUNTDOWN_TEST('Property','Value',...) creates a new COUNTDOWN_TEST or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before Countdown_test_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to Countdown_test_OpeningFcn via varargin.
%
% *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one
% instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES
% Edit the above text to modify the response to help Countdown_test
% Last Modified by GUIDE v2.5 23-Jan-2017 14:47:18
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @Countdown_test_OpeningFcn, ...
'gui_OutputFcn', @Countdown_test_OutputFcn, ...
'gui_LayoutFcn', [] , ...
'gui_Callback', []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT
% --- Executes just before Countdown_test is made visible.
function Countdown_test_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% varargin command line arguments to Countdown_test (see VARARGIN)
% Choose default command line output for Countdown_test
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes Countdown_test wait for user response (see UIRESUME)
% uiwait(handles.Countdown_test);
countdown_timer = timer;
set(countdown_timer,'ExecutionMode','fixedrate');
set(countdown_timer,'Period',1.0);
set(countdown_timer,'TimerFcn',{@countdowntimercallback,handles});
% Store the timer in the GUI so it persists for the life of the GUI
setappdata(handles.Countdown_test, 'Countdown_timer', countdown_timer);
fileName = 'state.mat';
if exist(fileName)
load(fileName)
set(handles.ed_PS_Time,'String',state.PST);
delete(fileName);
end
% --- Outputs from this function are returned to the command line.
function varargout = Countdown_test_OutputFcn(hObject, eventdata, handles)
% varargout cell array for returning output args (see VARARGOUT);
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Get default command line output from handles structure
varargout{1} = handles.output;
function ed_countdown_Callback(hObject, eventdata, handles)
% hObject handle to ed_countdown (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of ed_countdown as text
% str2double(get(hObject,'String')) returns contents of ed_countdown as a double
% --- Executes during object creation, after setting all properties.
function ed_countdown_CreateFcn(hObject, eventdata, handles)
% hObject handle to ed_countdown (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
set(hObject,'String','');
% --- Executes on button press in pb_start.
function pb_start_Callback(hObject, eventdata, handles)
% hObject handle to pb_start (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
countdown_timer = getappdata(handles.Countdown_test,'Countdown_timer');
anzahl=str2num(get(handles.ed_PS_Time,'String'));
sprintf('%0.3f',anzahl);
set(countdown_timer,'TasksToExecute',anzahl);
start(countdown_timer);
set(handles.ed_countdown, 'Enable','off');
durchlaeufe=get(countdown_timer,'TasksToExecute');
setappdata(handles.Countdown_test,'Durchlauf',durchlaeufe);
function countdowntimercallback(obj,~,handles)
countdown_timer = getappdata(handles.Countdown_test,'Countdown_timer');
durchlaeufe_aktuell=get(countdown_timer,'TasksExecuted');
durchlaeufe = getappdata(handles.Countdown_test,'Durchlauf');
Countdown = durchlaeufe - durchlaeufe_aktuell;
sprintf('%0.3f',Countdown);
set(handles.ed_countdown,'String',Countdown);
% --- Executes on button press in pb_stop.
function pb_stop_Callback(hObject, eventdata, handles)
% hObject handle to pb_stop (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% handles.ed_PS_Time = str2num(get(handles.ed_PS_Time, 'String'));
% guidata(hObject,handles);
countdown_timer = getappdata(handles.Countdown_test,'Countdown_timer');
stop(countdown_timer);
function ed_PS_Time_Callback(hObject, eventdata, handles)
% hObject handle to ed_PS_Time (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of ed_PS_Time as text
% str2double(get(hObject,'String')) returns contents of ed_PS_Time as a double
% --- Executes during object creation, after setting all properties.
function ed_PS_Time_CreateFcn(hObject, eventdata, handles)
% hObject handle to ed_PS_Time (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
set(hObject,'String','0');
% --- Executes when user attempts to close Countdown_test.
function Countdown_test_CloseRequestFcn(hObject, eventdata, handles)
% hObject handle to Countdown_test (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: delete(hObject) closes the figure
saveState(handles)
delete(hObject);
function saveState(handles)
state.PST = get(handles.ed_PS_Time, 'String');
save('state.mat','state')
}
