【matlab】----GUI编程-登录框实现（纯m文件）

1. 功能

• 用户名输入
• 密码输入（隐藏密码，带星号）
• 输入正确错误提示
• 带背景图片
• 带logo修改

2. 界面 
 
 
 
 
3. 源代码

【loginSys.m】
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function loginSys%% 清除变量，清命令窗口屏,清除图形clear;clc;%% 新建图形并设置相关属性%scrsz = get(0,'ScreenSize');Hd_login = figure('NumberTitle', 'off', 'Resize','off','Color',[0.753,0.753,0.753],'Name', '登录','tag','Hd_login');%取得Figure的JavaFrame。%修改图标newIcon = javax.swing.ImageIcon('.\images\icon.png');figFrame = get(Hd_login,'JavaFrame');            figFrame.setFigureIcon(newIcon);%转换图形窗口菜单条的“开”与“关”5set(Hd_login,'menubar','none','Unit','normalized','Position',[0.28,0.32,0.38,0.45]);%% 设置登录窗口背景图片%% 添加背景图片Hd_axes = axes('units','normalized','position',[0 0 1 1],'tag','Hd_axes');uistack(Hd_axes,'down')II=imread('.\images\login.jpg');image(II)% colormap grayset(Hd_axes,'handlevisibility','off','visible','off');%% 添加登录所需控件：用户名框、密码框等%用户名Hd_user = uicontrol('Parent',Hd_login,'Style','text',...    'String','用户名',...    'Units','normalized',...    'FontWeight','bold',...        'Background',[0.8 0.8 0.8],...    'ForegroundColor','black',...    'Units','normalized',...    'FontSize',25,...    'Enable','inactive',...    'tag','Hd_user',...    'Position',[0.1,0.68,0.25,0.15],...    'CallBack','');Hd_unserin = uicontrol('Parent',Hd_login,'Style','Edit',...    'String','',...    'FontWeight','bold',...    'ForegroundColor',[0.871,0.49,0],...    'Units','normalized',...    'FontSize',10,...    'HorizontalAlignment','left',...    'tag','Hd_unserin',...    'Position',[0.38,0.68,0.55,0.15],...    'CallBack','');%密码Hd_passwd = uicontrol('Parent',Hd_login,'Style','text',...    'String','密    码',...    'Units','normalized',...    'FontWeight','bold',...        'Background',[0.8 0.8 0.8],...    'ForegroundColor','black',...    'Units','normalized',...    'FontSize',25,...    'Enable','inactive',...    'tag','Hd_passwd',...    'Position',[0.1,0.48,0.25,0.15],...    'CallBack','');%java 实现密码文本框输入jPass = javax.swing.JPasswordField;J_passwdin = javacomponent(jPass,[198 167 287 52]);%提示 文本框hTip = uicontrol('style','text','visible','off','String','',...    'FontSize',18,...    'FontWeight','bold',...    'ForegroundColor','red',...    'position',[150 300 250 30]);%登录，修改密码uicontrol('pos',[100 80 140 40],'string','确认','FontWeight','bold',...    'ForegroundColor',[0 0 1],...    'FontSize',18,...    'callback',{@loginCheck,Hd_unserin,J_passwdin,hTip});uicontrol('pos',[290 80 140 40],'string','修改密码','FontWeight','bold',...    'ForegroundColor',[0 0 1],...    'FontSize',18,...    'callback',{@modifyPasswd,hTip});function modifyPasswd(~,~,hTip)    set(hTip,'Visible','on','string','请联系开发人员！');    pause(3);    set(hTip,'Visible','off');
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【loginCheck.m】
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function loginCheck(~, ~,hUser,hPass,hTip)    user = get(hUser,'String')    pswd = hPass.text    if (strcmp(pswd, '111111') && strcmp(user,'FreeApe'))        set(hTip,'Visible','off','string','密码正确');        out = '密码正确'        %do something...（比如进入系统主界面等）    else        set(hTip,'Visible','on','string','用户名或密码错误！');        pause(2);        set(hTip,'Visible','off');        out = '密码错误'    end