Please do not post the same thing multiple times. The board software automatically flags certain posts as needing moderator attention. This happens the most often for new users. I'm pretty sure this is made clear at the time you attempt to post. Posting the same thing over and over again just makes that many more posts the moderators have to weed through later. This makes us sad. Don't make us sad. If your post/thread doesn't appear, just wait a while. Don't post it again. If it hasn't shown up by the next day, then you can try again. I normally go through posts in the mornings, and try to check a few times throughout the day, but I'm not here 24/7. There will typically be a significant delay before posts are approved. Just be patient.
what's the difference between alpha=0 and hidden=YES?
I want to put a UIView as a subview to the toppest of all the other subviews. And I want to let this UIView be totally transparent and also let this UIView receive some input events such as slipping over its surface. So I set its alpha to Zero. It is totally transparent after that but the strange thing is it can't receive any input events. And if I tap it, the other UIViews below it would receive the tap event. It seems that the UIView whose alpha=0 disappears or hides. If that's true, I wonder that what's the difference between alpha=0 and hidden=YES?!!! How could it be?!! If alpha=0 and hidden=YES are the same, why do we need property hidden?
If anyone could give me an answer to this question or tell me another way to let a UIView be transparent and receive some input events at the same time, I'll appreciate him/her very much.
Also thank the guys who come in to read my question.
BTW, the UIView can receive events when its alpha value equals or more than 0.02. But I can't let it be 0.02 because of some reasons. I want it to be Zero.