Creating an app using Matlabs App designer, need help displaying images in the app from and API.

1 次查看（过去 30 天）
Aaron
Aaron 2023-7-17
评论： Walter Roberson 2023-7-18
I would like to display an image of the countries flag in the app associated to the name of the country selected in the drop down list. I can't seem to get it to work. This is my attempt so far, the image is in the API as a png file. The other fields populate, but the image will not.
data = webread('https://restcountries.com/v3.1/all');
val = app.Country_Select.Value;
switch val
case 'Jordan'
app.SpokenLanguageEditField.Value = data{1,1}.languages.ara;
app.PopulationSizeEditField.Value = data{1,1}.population;
app.AreaEditField.Value = data{1,1}.area;
app.RegionEditField.Value = data{1,1}.region;
app.Flagimage.ImageSource = (data{1,1}.flags.png);
end

请先登录，再回答此问题。

回答（1 个）

Walter Roberson
Walter Roberson 2023-7-17
[im, cmap] = imread(app.Flagimage.ImageSource);
if isempty(cmap)
if ndims(im) == 2
im = im(:,:,[1 1 1]); %gray to rgb
end
else
im = ind2rgb(im, cmap);
end
app.Flagimage.image = im;
  2 个评论
Walter Roberson
Walter Roberson 2023-7-18
Ran in:
It works when I test it.
data = webread('https://restcountries.com/v3.1/all');
val = 'Jordan';
switch val
case 'Jordan'
app.SpokenLanguageEditField.Value = data{1,1}.languages.ara;
app.PopulationSizeEditField.Value = data{1,1}.population;
app.AreaEditField.Value = data{1,1}.area;
app.RegionEditField.Value = data{1,1}.region;
app.Flagimage.ImageSource = (data{1,1}.flags.png);
end
[im, cmap] = imread(app.Flagimage.ImageSource);
if isempty(cmap)
if ndims(im) == 2
im = im(:,:,[1 1 1]); %gray to rgb
end
else
im = ind2rgb(im, cmap);
end
app.Flagimage.image = im;
imshow(app.Flagimage.image)

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Develop Apps Using App Designer 的更多信息

标签

产品


版本

R2022b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by