Add new DropDown item in App designer 2019a

Question

CamPe 2020-5-3

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/522714-add-new-dropdown-item-in-app-designer-2019a

评论： CamPe 2020-5-11

Im new in Matlab, and Im trying to add a new item to the existing dropdown items, from an EditField text value, but I havent find out how, this is what Im doing, but Im not sure how to finish it:

function EditFieldValueChanged(app, event)

new = app.EditField.Value;

hDropDown = app.DropDown;

currentItems = get(hDropDown);

[~, index] = ismember(hDropDown.Value, hDropDown.Items);

newItems = {currentItems,new};

newItems(index) = [];

end

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Answer 1

Tommy 2020-5-3

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/522714-add-new-dropdown-item-in-app-designer-2019a#answer_430004

在 MATLAB Online 中打开

This will add the edit text's string to the drop down's list of items as long as it is not already there:

function EditFieldValueChanged(app, ~)
    new = app.EditField.Value;
    if ~any(ismember(app.DropDown.Items, new))
        app.DropDown.Items = [app.DropDown.Items new];
    end
end

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