Question

matlab GUI 界面，保存图片的程序如下，保存文件夹里已经有相同名字的图片存在了，为什么不提醒是否替换

button1=questdlg('是否保存图片？',' ','是','否','是');
if strcmp(button1,'是')
axes(handles.axes1);
newfig=figure;
set(newfig,'visible','off');
newaxes=copyobj(handles.axes1,newfig);
set(newaxes,'units','default','position','default');
[filename,pathname]=uiputfile({'*.bmp','BMP files';'*.jpg','JPG files'},'保存图像','图片1');
if isequal(filename,0)||isequal(pathname,0)
return;
else
fpath=fullfile(pathname,filename);
newf=getframe(newfig);
f=frame2im(newf);
imwrite(f,fpath,'jpg');
close(newfig);
end
end

Answer 1

使用这个代码可以实现：
[filename pathname]=uiputfile({'*.jpeg','jpg file(*.jpg)');
str = [pathname filename];
strBefore = str(1:end-4);
strEx = str(end-3 : end);
figure('visible', 'off');
strcmp(strEx, '.jpg')
fullName = [strBefore,'.jpg'];
h=get(handles.axes1,'children');
figure('visible','off');
axes;
copyobj(h,gca)
print(gcf,'-dmeta',fullName)