Matlab实例学习--------不同界面的数据传递（多窗口编程）（实例）

实现功能为：两个窗口，一个主窗口一个子窗口。主窗口中有文本框和按钮，文本框用来显示子窗口中按钮的点击次数，按钮用来打开子窗口。     子窗口中包含文本框和两个按钮，文本框显示按钮点击次数，第一个按钮用来增加点击次数，第二个按钮用来返回主窗口。

实现步骤：

（1）创建两个GUI界面，分别为主窗口和子窗口，设置好相关属性和Tag等信息：

（2）编写主程序的回调函数：（主要是添加了按钮的响应函数）

function varargout = main(varargin)

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @main_OpeningFcn, ...
                   'gui_OutputFcn',  @main_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 main is made visible.
function main_OpeningFcn(hObject, eventdata, handles, varargin)

% Choose default command line output for main
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes main wait for user response (see UIRESUME)
% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.
function varargout = main_OutputFcn(hObject, eventdata, handles) 

% Get default command line output from handles structure
varargout{1} = handles.output;

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
set(handles.figure1,'Visible','off');%将主窗口隐藏
times=child(handles.figure1);%调用显示子窗口并接收子窗口的返回参数
set(handles.text1,'String',num2str(times));%将文本设置为从子窗口接收过来的按钮点击次数

（3）编写子窗口的回调函数：

function varargout = child(varargin)

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @child_OpeningFcn, ...
                   'gui_OutputFcn',  @child_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 child is made visible.
function child_OpeningFcn(hObject, eventdata, handles, varargin)

% Choose default command line output for child
handles.output = hObject;

global count;%定义全局变量用来统计按钮点击次数
count=0;%初始化

main=varargin{1};%获取主窗口传递过来的参数
handles.mainhandles=guihandles(main);%将主窗口传递过来的参数添加到handles结构体中

% Update handles structure
guidata(hObject, handles);%更新handles结构体

% UIWAIT makes child wait for user response (see UIRESUME)
uiwait(handles.figure1);%设置等待，等待用户进行操作

% --- Outputs from this function are returned to the command line.
function varargout = child_OutputFcn(hObject, eventdata, handles) 

% Get default command line output from handles structure
global count;
varargout{1} = count;%输出返回参数，返回按钮点击次数

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
global count;
count=count+1;%按钮点击次数增加
set(handles.text1,'String',num2str(count));%设置文本为点击次数
% guidata(hObject, handles);%更新

% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
set(handles.mainhandles.figure1,'Visible','on');%将主窗口显示出来
uiresume(handles.figure1);%用户操作完成
closereq%关闭子窗口

（4）程序运行结果