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[Flutter/dart]GestureDetector event runs when page is displayed


Phenomenon

Certain icons perform certain actions when long-pressed

To achieve this, I registered the actions in GestureDetector's onLongPress event.


However, when I tried to build it, the process was executed when the icon was displayed.


Below is the source code for the relevant part.

Now, what's wrong?


return GestureDetector(
  child: Container(
    //・・・
  ),
  onLongPress: onLongPress(),
);
  
void onLongPress(){
 //actions to executed on log-press
}

Cause

What you should pass is onLongPress

When passing onLongPress(), the execution result is passed, so the process is executed to obtain the result in the GestureDetector constructor.

You must pass the method instead of the execution result.



Lastly

You can easily understand it when summarized like this, but when it occurred, I didn't know what was going on and was confused lol

Actually, it was a part github copilot wrote, but I had to check it properly.

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