THAT is how I find this bug:
There is a script on a
Button,and I add a method in that script to this
Button's "On Click" Notify List.Then I remove this particular script,But
Button's Notify List haven't clear.After a while,I find I remove this script wrong,So I add this script to the
Button back,and "On Click" Notify List look like right,but the method in List never been execute.Then I realize maybe old list point wrong place,So I reAdd the method to the Notify List,It's works fine.
To someone who have similar situation like me,Hope this help.
