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搞了一下午，看了些资料，终于弄好了matlab GUI中的回调函数。
效果图见底部~
umtitled3.m:
function varargout = untitled3(varargin)% UNTITLED3 M-file for untitled3.fig% UNTITLED3, by itself, creates a new UNTITLED3 or raises the existing% singleton*.%% H = UNTITLED3 returns the handle to a new UNTITLED3 or the handle to% the existing singleton*.%% UNTITLED3('CALLBACK',hObject,eventData,handles,...) calls the local% function named CALLBACK in UNTITLED3.M with the given input arguments.%% UNTITLED3('Property','Value',...) creates a new UNTITLED3 or raises the% existing singleton*. Starting from the left, property value pairs are% applied to the GUI before untitled3_OpeningFunction gets called. An% unrecognized property name or invalid value makes property application% stop. All inputs are passed to untitled3_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% Copyright 2002-2003 The MathWorks, Inc.% Edit the above text to modify the response to help untitled3% Last Modified by GUIDE v2.5 18-Mar-2012 16:58:53% Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @untitled3_OpeningFcn, ... 'gui_OutputFcn', @untitled3_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 untitled3 is made visible.function untitled3_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 untitled3 (see VARARGIN)% Choose default command line output for untitled3handles.output = hObject;% Update handles structureguidata(hObject, handles);% UIWAIT makes untitled3 wait for user response (see UIRESUME)% uiwait(handles.figure1);% --- Outputs from this function are returned to the command line.function varargout = untitled3_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 structurevarargout{1} = handles.output;% --- Executes on button press in openfile.function openfile_Callback(hObject, eventdata, handles)%打开文件global filepfilep=OnFileOpen();% hObject handle to openfile (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)% --- Executes on button press in pushbutton2.function pushbutton2_Callback(hObject, eventdata, handles)%求取sift特征global filepglobal im1global des1global loc1[im1,des1,loc1] = sift(filep);showkeys(im1,loc1);% hObject handle to pushbutton2 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)% --- Executes on button press in pushbutton3.function pushbutton3_Callback(hObject, eventdata, handles)%写入txt文件global im1global des1global loc1fid=fopen('matrix.txt','w');fprintf(fid,'%f',des1);%sift特征fclose(fid);% hObject handle to pushbutton3 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)图片贴上：
design view:
result view:
property inspector:
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