我的目标是从Error using
UnitConverter/lbs2kg
Too many input arguments.
Error in
UnitConverter>@(varargin)app.lbs2kg(varargin{:})
(line 22)
'Callback',@app.lbs2kg,'String',app.inputMass);
Error while evaluating UIControl Callback
文本框中获取用户的输入,对输入执行操作,然后将输出显示到另一个文本框。 MATLAB给出了错误:
classdef UnitConverter < handle
properties
Figure % Graphics handles
DispInputMass
DispOutputMass
inputMass %Variables/Class Properties
outputMass
end
methods
function app = UnitConverter
% This is the "constructor" for the class
% It runs when an object of this class is created
app.Figure = figure('Name','Unit Converter') ;
app.DispInputMass = uicontrol('Style','edit',...
'Callback',@app.lbs2kg,'String',app.inputMass);
app.DispOutputMass = uicontrol(app.Figure,'Style','edit','Position'...
,[168 100 47 26],'String','kg');
end
function lbs2kg(app,evt)
app.inputMass = get(app.DispInputMass,'string');
app.outputMass = app.inputMass*.453;
set(app.DispOutputMass,'string',app.outputMass);
end
end
end
这是我的代码:
{{1}}
答案 0 :(得分:0)
回调方法实际上有3个输入 - MATLAB抛出此错误,因为它试图向回调发送三个输入,写入只接受2. 3个输入是(按顺序):主要对象(app) ,发送事件的对象(uicontrol)和事件(matlab.ui.eventdata.ActionData)。
您可以将代码更改为以下代码以使其正常工作:
function lbs2kg(app, obj, evt)
app.inputMass = get(app.DispInputMass,'string');
app.outputMass = app.inputMass*.453;
set(app.DispOutputMass,'string',app.outputMass);
end
此外,您可以将函数的第一行更改为以下内容:
function lbs2kg(varargin)
断开回调第一行的代码并调查varargin的内容。有关varargin的更多帮助,请参阅此处(http://www.mathworks.com/help/matlab/ref/varargin.html)