How do I fix the "A METHODS block or END might be missing before the function definition. This might be causing additional error messages." issue.

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Ahmed Mukhtar
Ahmed Mukhtar 2021-5-12
评论： Jan 2021-5-13
Hey, I'm new to the app designer in MATLAB and while trying to write a code for a button push callback I get the message A METHODS block or END might be missing before the function definition. This might be causing additional error messages. Here's a screenshot for reference:
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Ahmed Mukhtar
Ahmed Mukhtar 2021-5-12
Additional error info:
Error using app4
Error: File: app4.mlapp Line: 57 Column: 9
Function definition not supported in this context. Create functions in code file.

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采纳的回答

Image Analyst
Image Analyst 2021-5-13
It looks like you defined the function ApplyNoiseButtonPushed inside itself. No - you cannot do that. A function cannot have another function nested inside it that has the same name as the parent function. Either delete that line, or (if it really is a separate function) call it something else.

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Jan
Jan 2021-5-12
编辑：Jan 2021-5-12
The conditions are not recognized in the "elseif" commands. If you really want to move them to the next line, insert the line continuation "..." . But it looks nicer, if you move the condition to the same line as the elseif.
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Jan
Jan 2021-5-13
There are two lines, which define the same function:
function ApplyNoiseButtonPushed(app, evt) % First
function ApplyNoiseButtonPushed(app, ~) % Twice
Simply omit the 2nd one.

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