点击Cell中的按钮时，如何取所在的Cell

4.点击Cell中的按钮时，如何取所在的Cell：
-(void)OnTouchBtnInCell:(UIButton *)Btu
{
CGPoint point = btn.center;
point = [table convertPoint:point fromView:btn.superview];
NSIndexPath* indexpath = [table indexPathForRowAtPoint:point];
UITableViewCell *cell = [table cellForRowAtIndexPath:indexpath];
...