How to delete the text of the previous state

Question

han han 2020-7-2

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/558316-how-to-delete-the-text-of-the-previous-state

编辑： Walter Roberson 2020-7-2

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

I want to implement an input UE ID (edit1) will display text on axes.

But I want to have only one text on axes.

For example: I entered UE ID 5 and pressed pushbutton, and then entered UE ID 6 and pressed pushbutton. When axes only displayed the text of UE ID 6.

function varargout = untitled(varargin)
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @untitled_OpeningFcn, ...
                   'gui_OutputFcn',  @untitled_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 untitled is made visible.
function untitled_OpeningFcn(hObject, eventdata, handles, varargin)
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% --- Outputs from this function are returned to the command line.
function varargout = untitled_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 pushbutton2_Callback(hObject, eventdata, handles)
[UElocation] = textread('observe/mdUELocationforGUI2.txt');
InputUEID = get(handles.edit1,'String');
InputUEID2 = str2double(InputUEID);
InputUEID3 = InputUEID2+1;
axes(handles.axes1)
c = string(InputUEID);
x3 = text(UElocation(InputUEID3,2), UElocation(InputUEID3,3), c,'FontSize',16);
axis([0 120 0 120])
function edit1_Callback(hObject, eventdata, handles)
function edit1_CreateFcn(hObject, eventdata, handles)
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end

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Answer 1

Walter Roberson 2020-7-2

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/558316-how-to-delete-the-text-of-the-previous-state#answer_459949

编辑：Walter Roberson 2020-7-2

在 MATLAB Online 中打开

function pushbutton2_Callback(hObject, eventdata, handles)
[UElocation] = textread('observe/mdUELocationforGUI2.txt');
InputUEID = get(handles.edit1,'String');
InputUEID2 = str2double(InputUEID);
InputUEID3 = InputUEID2+1;
ax = handles.axes1;
delete(findobj(ax.Children, 'flat', 'type','text'));  %delete previous text if any
c = string(InputUEID);
x3 = text(ax, UElocation(InputUEID3,2), UElocation(InputUEID3,3), c,'FontSize',16);
axis(ax, [0 120 0 120])