问题
I have a list of TPanels in a FMX application and I want to free a panel if I click on it.
To free them directly in the Onclick-handler is not the right way, because I get an access-violation. And I don't want to use windowsmessages (recommended in How to free control inside its event handler? and Why does my program crash when I destroy a button in its own OnClick handler?) because it is a firemonkey application and I do not know how these messages work on android and mac.
Is there another solution?
回答1:
Use myObject.Release:
Marks this TFmxObject object for delayed deletion.
Immediate actions in this method:
- set Parent = nil
- insert object into delayed delete list
Delayed action:
- free object from list (
vPurgatory).
Remember, that method Free (and procedure FreeAndNil) does not remove the object itself in mobile platforms:
// under ARC, this method isn't actually called since the compiler translates // the call to be a mere nil assignment to the instance variable, which then calls _InstClear
来源：https://stackoverflow.com/questions/31785692/how-to-free-a-control-in-its-own-event