Hello,
I am implementing mouse support in Core Animation. For this I have a
CAButton : CALayer and adds button-related behavior : highlighting on
mouseDown, stopping highlighting on mouseExit, etc. and actions.
The actions are associated using:
-[CAButton setAction:(SEL) withTarget:(SEL)]
These are performed on mouseUp if the mouse is still within the
button's rect.
The problem that occurred is that the action might cause the button to
be removed by a side-effect of performSelector (ex. a view switch) and
I might still need to perform additional actions that needs button's
ivars after performSelector has been called (which might cause
unexpected behavior).
When I encounter the problem, I changed mouseUp so it does not need to
perform any action after the performSelector. But I am wondering if
there are special practices to prevent this problem : should we assume
that the button will not be released by the performAction, retain it
before the performSelector and release it after, or do not use self
after performSelector ?
Thanks for your advice,
Yvan
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