GUI工作流命令

Question

我正在Matlab中開發一個GUI，我想知道單擊按鈕時的工作流程。更具體一點，我想知道當我點擊一個按鈕時會發生什麼，因爲它的回調沒有被觸發。

Answer 1

如果使用GUIDE開發，每次添加一個按鈕，你的GUI生成的代碼塊：

% --- Executes on button press in pushbutton1. 
function pushbutton1_Callback(hObject, eventdata, handles) 
% hObject handle to pushbutton1 (see GCBO) 
% eventdata reserved - to be defined in a future version of MATLAB 
% handles structure with handles and user data (see GUIDATA) 

該功能被稱爲每次按下該按鍵的時間。所以，如果你點擊按鈕時需要執行某些操作，只需要在生成的代碼塊下面添加要執行的代碼行即可。例如，假設你有一個edit text變量稱爲edit1與價值

edit1 = 'hello'; 

如果你想用它，你需要調用handles互動，但首先你需要創建一個全局變量：

%set the current figure handle to main application data 
setappdata(0,'figureHandle',gcf); 
%set the handles to figure's application data 
setappdata(gcf,'EDIT1',handles.edit1); 

然後，在你的按鈕的回調函數，你需要寫：

% --- Executes on button press in pushbutton1. 
function pushbutton1_Callback(hObject, eventdata, handles) 
% hObject handle to pushbutton1 (see GCBO) 
% eventdata reserved - to be defined in a future version of MATLAB 
% handles structure with handles and user data (see GUIDATA) 
figureHandle = getappdata(0,'figureHandle'); 
EDIT1 = getappdata(figureHandle,'EDIT1 '); 
new_string = 'updated string'; 
set(EDIT1, 'String', new_string); 

希望這有助於