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

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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 EDITgui_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});endif 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 mainhandles.output = hObject;% Update handles structureguidata(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 structurevarargout{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 EDITgui_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});endif 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 childhandles.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 structureguidata(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 structureglobal 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

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